EP0117806A1 - Fluid distribution device, particularly for a remote control - Google Patents

Fluid distribution device, particularly for a remote control Download PDF

Info

Publication number
EP0117806A1
EP0117806A1 EP84400311A EP84400311A EP0117806A1 EP 0117806 A1 EP0117806 A1 EP 0117806A1 EP 84400311 A EP84400311 A EP 84400311A EP 84400311 A EP84400311 A EP 84400311A EP 0117806 A1 EP0117806 A1 EP 0117806A1
Authority
EP
European Patent Office
Prior art keywords
drawer
pusher
chamber
fluid
bore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84400311A
Other languages
German (de)
French (fr)
Other versions
EP0117806B1 (en
Inventor
Michel Bessard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rexroth Sigma SA
Original Assignee
Rexroth Sigma SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rexroth Sigma SA filed Critical Rexroth Sigma SA
Priority to AT84400311T priority Critical patent/ATE21148T1/en
Publication of EP0117806A1 publication Critical patent/EP0117806A1/en
Application granted granted Critical
Publication of EP0117806B1 publication Critical patent/EP0117806B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87056—With selective motion for plural valve actuator
    • Y10T137/87064—Oppositely movable cam surfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87056—With selective motion for plural valve actuator
    • Y10T137/87072—Rotation about either of two pivotal axes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87233—Biased exhaust valve

Definitions

  • the invention relates to a fluid dispensing device, in particular for a remote control, of the type which includes a body provided with bores with parallel axes in which are mounted sliding drawers associated two by two, in particular symmetrically with respect to the 'axis of the body, these drawers being controlled by pushers actuated by an oscillating cam or the like to establish the desired communications between an inlet of pressurized fluid, a reservoir of fluid at low pressure, and a starting orifice towards a member of use, each spool bore having a groove connected to the arrival of pressurized fluid, each slide valve being combined with a chamber limited by at least one annular surface of trans - versale of the drawer and connected to the tank via a throttle.
  • the invention relates more particularly, but not exclusively, the dispensing devices of this kind used on s public works vehicles.
  • the object of the invention is essentially to remedy these drawbacks as far as possible and to propose a dispensing device which gives better satisfaction to the various requirements of the practice, and which, in particular, is of a smoother operation, which either more reliable and safer and which is of a simpler and less costly structure to manufacture.
  • a fluid dispensing device of the kind defined above is characterized in that it comprises means for returning each pusher suitable for maintaining a first pusher in permanent support against the cam when the latter tends to move away from said pusher during the driving-in movement of a second associated pusher, the drawer corresponding to the first pusher being driven by the latter in its movement, and by the fact that each drawer has, on its periphery, towards its end distant of the pusher, a recess whose arrangement and length are such that before the end of the complete movement of the drawer during its drive by the first pusher, said recess establishes a connection between the inlet of pressurized fluid and the said chamber, the assembly being such that there is a rise in pressure of the fluid in this chamber which ensures the locking of the drawer and of the first pusher in the high position and, consequently, the locking of the other pusher and of the corresponding drawer in position low.
  • each pusher may comprise elastic return means, in particular formed by a spring bearing at one end against the body, and at the other end against the pusher, abutment surfaces being provided between the pusher and the drawer to allow the drawer to be driven by the pusher.
  • the recess provided at the periphery of the drawer can be formed by a peripheral clearance forming an annular groove.
  • the drawer can be a regulation drawer, the insertion of which is controlled, from the pusher, by means of a setting spring so that the pressure of the fluid, at the outlet orifice, can be adjusted.
  • the starting orifice is provided in the axis of the bore of the regulating slide, which comprises an axial channel opening at one end towards said starting orifice, the aforesaid. chamber being provided in the body of the distributor and being located in the direction of the axis of the bore between the zone of this bore where the axial channel opens and the groove connected to the pressure inlet.
  • the drawer can be a simple dispensing drawer directly controlled by the pusher; the chamber is then provided, in the distributor body, at the end of the drawer opposite the pusher.
  • all the fluid pressure inlet, return to the reservoir, and departure orifices can be provided on the same face of the distributor, generally the face opposite to that adjacent to the cam.
  • the locking is provided in such a way that it is possible for the user to overcome the locking effort in the event of an emergency or safety stop, by acting on the normal control and exerting a reasonable effort.
  • This unlocking command can be carried out by establishing a connection, in particular by means of an electrovalve, between the chambers corresponding to two associated drawers.
  • a fluid distributor device 1 formed by a hydraulic manipulator, in particular for remote control.
  • This device comprises a body 2 provided with bores 3 with parallel axes in which are mounted drawers 4 associated two by two, symmetrically with respect to the axis A-A of the body.
  • Generally two or four slots, as well as two or four corresponding drawers are provided in the body 2, diametrically opposite two by two.
  • Each drawer 4 is controlled by a pusher 5 actuated by an oscillating cam 6 or the like.
  • the cam 6 forms a sort of plate fixed to a control lever 7 articulated around the point O.
  • Each slide 4 is suitable for establishing, by moving in the bore 3, the desired communications between an inlet for pressurized fluid P located in the body 2, a low-pressure fluid reservoir (not shown) connected to the areas designated by T and a starting orifice D, corresponding to each bore 3, towards a user member (not shown) such as a hydraulic cylinder .
  • Each bore 3 has an annular groove 8 connected to the pressurized fluid inlet P.
  • Each drawer 3 is combined with a chamber 9 limited by at least one annular transverse surface b of the drawers.
  • This chamber 9 is connected to a pipe 10 leading to the reservoir via a throttle e advantageously formed by a nozzle 11 with calibrated nozzle mounted in a pipe 12 connecting the chamber 9 to the pipe 10.
  • each drawer 4 is a regulation drawer whose insertion, in the bore 3 is controlled from the pusher 5 by means of a calibration spring 13.
  • the outlet or departure orifice D associated with the bore 3 is provided in the axis of this bore; the drawer 4 has an axial channel 14 opening at its end 15 facing the orifice D. Radial channels, 16, 17 are provided in appropriate places, in the axial direction, to establish the desired connections during the movement of the drawer 4 .
  • the end zone 15 of the drawer 4 has a smaller diameter f than that of the bore 3 (the diameter of the bore 3 is, apart from the operating clearance, that of the major part of the drawer 4 ).
  • the transverse annular surface b is formed by the shoulder marking the transition between the end zone 15 and the rest of the drawer.
  • the chamber 9 is provided in the body of the distributor and is located, in the direction of the axis of the bore, between the zone 21 of this bore where the axial channel 14 opens, and the groove 8 connected to the inlet of pressure P.
  • the dispensing device 1 comprises return means R of each pusher 5 suitable for maintaining a first pusher against the cam 6 when the latter tends to move away from said pusher during the driving-in movement of a second diametrically opposite pusher. According to the representation of FIG. 1, this means that the first pusher 5 is held in abutment against the cam 6 when the region of the latter, in abutment against the pusher, moves upwards.
  • These return means R advantageously comprise elastic return means formed by a spring 22 bearing, at one end, against the body 2 and, at its other end, against the pusher 5, in particular by means of a cup 23.
  • Stop surfaces 24, 25 are provided between the pusher 5 and the drawer 4 to allow the drawer to be driven, by the pusher 5 under the action of the spring 23, in an upward movement according to the representation in FIG. 1. More specifically, the abutment surface 24 of the pusher 5 is obtained at using two semi-washers separated according to a diameter, inserted between the cup 23 and the base of the pusher 5.
  • the abutment surface 25 is formed by a transverse shoulder of the head 25a of a plunger 26 secured to the drawer 4.
  • the head 25a is located in a blind bore 27 of the pusher 5, the axial length of this blind bore 27 allowing a movement, upwards relative to the pusher, of the head 25a.
  • the cup 23 and the pusher 5 slide in a bore 28 provided in an upper part 2a, attached, of the distributor body.
  • the bore 28 is closed by a plug 29, screwed into the threaded end of the bore 28, and the internal transverse face 29a of which serves as a limit stop for the pusher 5.
  • Each drawer 4 has, on its periphery, towards its end 15 remote from the pusher, a cavity advantageously constituted by a peripheral recess forming an annular groove 30 situated between the end zone 15 of the drawer 4, and the rest of the drawer.
  • this groove 30 along the axis of the drawer 4, and its length are such that before the end of the complete displacement of the drawer 4 during its drive (upwards according to the representation of FIG. 1) by the pusher 5 , said recess or groove 30 establishes a connection between the groove 8 for the arrival of pressurized fluid and the chamber 9.
  • this chamber there is an increase in fluid pressure in this chamber, which ensures the hydraulic locking of the drawer 4 and of the pusher 5 in the high position and consequently the locking of the pusher and of the corresponding diametrically opposite drawer in the low position.
  • the abutment surface 29a of the plug 29 is located so that the pusher 5 can travel long enough for the groove 30 to come into communication with the groove 8.
  • the permanent flow which is established through the nozzle 11 creates a pressure drop ensuring the maintenance of sufficient pressure in the chamber 9 for hydraulic locking.
  • This locking is provided in such a way that it is possible for the user to overcome the hydraulic locking effort in the event of an emergency stop or for safety reasons by exerting a reasonable effort on the lever 7.
  • An automatic unlocking control can be provided for example when a lifting movement controlled by the operating member (not shown) connected to the starting orifice D is completed.
  • this unlocking command comprises a set 31 of connecting pipes between the two chambers 9 of the diametrically opposite drawers 4.
  • the passage of the fluid in this pipe assembly 31 is controlled by a solenoid valve 32 whose drawer 33 is housed in a pipe section of the assembly 31.
  • the hydraulic locking can take place.
  • the communication between the two opposite chambers 9 is established by the drawer 33, there is pressure equalization in the chambers and unlocking, in particular because the spring 19 compressed by the pressed drawer 4 can push this drawer 4 and therefore the cam 6 to the neutral position.
  • the control of the solenoid valve 32 can be ensured by a limit switch contact (not shown) controlling the unlocking at the end of movement, for example of a jack connected to the orifice D , or on a distributor with hydraulic control controlled by the pressure from the orifice D, by displacement of the slide 33.
  • the corresponding pusher 5 When the lever is tilted in one direction, the corresponding pusher 5 is actuated by the cam 6 including the corresponding calibration spring 16 which pushes the regulation slide 4 downwards.
  • connection which existed, in neutral position, between the starting orifice D and the exhaust T is removed; as the slide-in stroke of the slide 4 continues, the connection between the pressure inlet groove 8 and the starting orifice D is established by means of the radial channel 17 and the axial channel 14.
  • the other pusher 5 diametrically opposite to that which is depressed, is kept in contact against the cam 6 by the effect of the corresponding spring 22.
  • the slide 4 and the plunger 26 progressively rise until the recess g (groove 30) connects the groove 8 with the corresponding chamber 9.
  • the resulting flow of fluid in the chamber 9, through the nozzle 11, creates a pressure drop and an increase in pressure in the chamber 9.
  • This pressure causes the slide 4 and the plunger 26 which will come up abutment against the bottom of the blind bore 27.
  • the corresponding push-button 5 goes up in turn driving the cam 6 and the lever 7.
  • Hydraulic locking is performed. The user can release the lever 7 without the dispensing function being interrupted.
  • the solenoid valve 32 establishes, through its drawer 33, communication between the diametrically opposed chambers 9 and the equalization of the pressures in these chambers 9 cause the lever 7 to be unlocked and returned to position 9 , in particular due to the action of that of the springs 19 which is compressed.
  • the layout of the pipes in the body 2 is particularly simple, in particular because of the situation of the starting orifice D in the axial extension of the channel 14.
  • the body 2 has a lower part 2b, attached, as visible in FIG. 1.
  • the separation between the part 2b and the body 2 is advantageously carried out at the end surface of the Part 15 of the drawer 4 in the neutral position.
  • the bore 3 in which the major part of the slide 4 slides, and the bore in which the end portion 15 slides are provided in the same part 2 and their concentricity can be obtained under good conditions, when the making.
  • FIG. 2 illustrates an alternative embodiment in which the dispensing device is still equipped with regulation drawers.
  • the numerical references used in FIG. 1 are repeated, possibly accompanied by the letter c in FIG. 2, to designate identical elements or playing similar roles. The description of these elements will not be repeated in detail.
  • FIG. 2 The differences in construction between FIG. 2 and FIG. 1 will essentially be noted.
  • the chambers 9c are provided at the end of the bore 3 in which the drawer 4c slides.
  • the transverse surface b partially limiting the chamber 9c is formed by the frontal annular end surface of drawer 4c.
  • This drawer has an axial channel 14 transforming, in the area facing the chamber 9c, into a cylindrical housing 34 of larger diameter, which opens towards the chamber 9c.
  • a needle 35 is slidably mounted in a sealed manner in this housing 34; this cylindrical needle 35 bears, at one end, against the bottom of the chamber 9c.
  • the two ends of the needle 35 are rounded.
  • the spring 19 is compressed between the bottom of the chamber 9c and and an annular flange facing outwards from a bush 36 mounted on the end zone of the drawer 4c; the sleeve 36 has an inner rim 37 bearing against the transverse surface b of the drawer 4c.
  • the recess is formed by a clearance peri- p hérique 40 provided at the end of the drawer 4c.
  • the starting pipe 38 is connected by a bore, not shown, to the underside of the part 2b.
  • the chamber 9c receives pressurized fluid, and the pressure drop through the nozzle 11 causes the rise in pressure from this room.
  • the needle 35 then recovers in its housing 34 under the effect of the pressure and abuts against the bottom of this housing.
  • the plunger 4c also rises under the effect of the pressure, and the head 25a abuts against the bottom of the bore 27.
  • Hydraulic locking is obtained under the same conditions as those mentioned above.
  • the springs 22 constitute simple and effective means of returning the pushers 5 to keep them in abutment against the cam 6 when the latter tends to move away from them, one could imagine other types return means, for example a mechanical connection between the cam 6 and the pusher 5.
  • FIG. 3 shows an alternative embodiment of the dispensing device according to which the drawer 4d is a simple dispensing drawer, the insertion of which is controlled by the direct mechanical thrust of the pusher 5; for this, the head 25d of the plunger linked to the drawer 4d is in abutment against the bottom of the blind bore 27 of the pusher 5.
  • a chamber 9c such as that shown in Figure 2 and just described.
  • the recess g is always formed by an annular peripheral clearance 40 provided at the end of the drawer 4d, the section of which is full.
  • This distribution drawer 4d has, in its central zone, a groove with flared walls 41 ensuring the desired communications during the movement of the drawer 4d.
  • the spring 22 ensures permanent contact of the pusher 5 with the cam 6 and helps to avoid impacts between these two parts.
  • the spring 19 maintains the neutral position when the manipulator is unlocked.

Abstract

The fluid distributing device, more especially for remote control, comprises a body (2) having bores (3) with parallel axes in which are slidably mounted slide valves (4) associated in pairs and controlled by push-rods (5) actuated by an oscillating cam (6). Each slide valve bore (3) has a groove (8) connected to the pressurized fluid intake, each slide valve being combined with a chamber (9) limited by at least one transverse annular surface (b) of the slide valve and connected to the reservoir by a constriction. It comprises return devices (R) for each push-rod (5) adapted to maintain a first push-rod in abutment against the cam (6) when this latter tends to move away from the push-rod and each slide valve comprises, on its periphery, towards its end (15) remote from the push-rod, a recess (g) whose arrangement and length are such that before the end of the complete movement of the slide valve (4) when it is driven by the first push-rod, the recess establishes a connection between the pressurized fluid intake (8, P) and the chamber (9), the whole being such that there is a rise in pressure of the fluid in this chamber (9) which causes locking of the slide valve (4) and of the first push-rod (5) in the high position.

Description

L'invention est relative à un dispositif distributeur de fluide, notamment pour télécommande, du genre de ceux qui comprennent un corps muni d'alésagesà axes parallèles dans lesquels sont montés des tiroirs coulissants associés deux par deux, notamment de manière symétrique par rapport à l'axe du corps, ces tiroirs étant commandés par des poussoirs actionnés par une came oscillante ou analogue pour établir les communications souhaitées entre une arrivée de fluide sous pression, un réservoir de fluide à basse pression, et un orifice de départ vers un organe d'utilisation, chaque alésage de tiroir comportant une gorge reliée à l'arrivée de fluide sous pression, chaque tiroir étant combiné avec une chambre limitée par au moins une surface annulaire trans- versale du tiroir et reliée au réservoir par un étranglement.The invention relates to a fluid dispensing device, in particular for a remote control, of the type which includes a body provided with bores with parallel axes in which are mounted sliding drawers associated two by two, in particular symmetrically with respect to the 'axis of the body, these drawers being controlled by pushers actuated by an oscillating cam or the like to establish the desired communications between an inlet of pressurized fluid, a reservoir of fluid at low pressure, and a starting orifice towards a member of use, each spool bore having a groove connected to the arrival of pressurized fluid, each slide valve being combined with a chamber limited by at least one annular surface of trans - versale of the drawer and connected to the tank via a throttle.

L'invention concerne plus particulièrement, mais non exclusivement, les dispositifs distributeurs de ce genre utiliséssur les engins de travaux publics.The invention relates more particularly, but not exclusively, the dispensing devices of this kind used on s public works vehicles.

Il est connu d'agencer un distributeur de fluide du genre en question de façon que la commande puisse être immobilisée dans une position de travail déterminée par avance pour une fonction donnée. Un tel verrouillage permet à l'utilisateur du dispositif distributeur de fluide de lâcher le levier agissant sur la came oscillante, sans que la fonction soit interrompue ; pendant ce temps, l'u- tilisateur peut effectuer une autre manoeuvre.It is known to arrange a fluid distributor of the kind in question so that the control can be immobilized in a working position determined in advance for a given function. Such locking allows the user of the fluid distributor device to release the lever acting on the oscillating cam, without the function being interrupted; meanwhile, the u - ser may do any other operation.

Un tel dispositif distributeur de fluide est connu par exemple de par la demande de brevet DE 32 16 659. Toutefois, ce dispositif connu présente l'inconvénient que, en raison même de son agencement, le poussoir qui est situé en regard de la partie de la came qui a tendance à s'éloigner n'est soumis à une force ascendante apte à le déplacer au contact de la came que lorsque la came a été amenée et maintenue dans une inclinaison extrême provoquant l'enfoncement maximum d'un autre poussoir opposé au précédent. Cette brusque venue en appui du poussoir premier nommé contre la came est génératrice de chocs susceptibles de gêner l'utilisateur et d'endommager à la longue l'appareillage.Such a fluid dispensing device is known for example from patent application DE 32 16 659. However, this known device has the disadvantage that, by reason of its arrangement, the pusher which is located opposite the part of the cam which tends to move away is not subjected to an upward force capable of move it in contact with the cam only when the cam has been brought in and kept in an extreme inclination causing the maximum depression of another push rod opposite to the previous one. This abrupt abutment of the first push button named against the cam generates shocks likely to annoy the user and damage the apparatus in the long run.

En outre, un tel agencement rend deux poussoirs opposés asservis l'un à l'autre puisque la pression hydraulique nécessaire au déplacement vers le haut de l'un est fournie à la suite du déplacement vers le bas de l'autre. Il en résulte que la fiabilité et la sécurité du dispositif ne sont pas optimales.In addition, such an arrangement makes two opposite pushers slaved to each other since the hydraulic pressure necessary for the upward movement of one is supplied following the downward movement of the other. As a result, the reliability and security of the device are not optimal.

Enfin, l'agencement en question nécessite l'usinage de nombreux canaux de liaison, ce qui complique singulièrement la structure et en accroît le coût de fabrication.Finally, the arrangement in question requires the machining of numerous connecting channels, which singularly complicates the structure and increases the manufacturing cost.

L'invention a essentiellement pour but de remédier à ces inconvénients dans toute la mesure du possible et de proposer un dispositif distributeur qui donne mieux satisfaction aux diverses exigences de la pratique, et qui, en particulier, soit d'un fonctionnement plus doux, qui soit plus fiable et plus sûr et qui soit d'une structure plus simple et moins coûteuse à fabriquer.The object of the invention is essentially to remedy these drawbacks as far as possible and to propose a dispensing device which gives better satisfaction to the various requirements of the practice, and which, in particular, is of a smoother operation, which either more reliable and safer and which is of a simpler and less costly structure to manufacture.

Selon l'invention, un dispositif distributeur de fluide du genre défini précédemment, est caractérisé par le fait qu'il comporte des moyens de rappel de chaque poussoir propres à maintenir un premier poussoir en appui permanent contre la came lorsque celle-ci a tendance à s'éloigner dudit poussoir lors du mouvement d'enfoncement d'un deuxième poussoir associé, le tiroir correspondant au premier poussoir étant entraîné par celui-ci dans son mouvement, et par le fait que chaque tiroir comporte, sur sa périphérie, vers son extrémité éloignée du poussoir, un évidement dont la disposition et la longueur sont telles qu'avant la fin du déplacement complet du tiroir lors de son entraînement par le premier poussoir, ledit évidement établisse une liaison entre l'arrivée de fluide sous pression et la susdite chambre, l'ensemble étant tel qu'il y ait une montée en pression du fluide dans cette chambre qui assure le verrouillage du tiroir et du premier poussoir en position haute et, par conséquent, le verrouillage de l'autre poussoir et du tiroir correspondant en position basse.According to the invention, a fluid dispensing device of the kind defined above, is characterized in that it comprises means for returning each pusher suitable for maintaining a first pusher in permanent support against the cam when the latter tends to move away from said pusher during the driving-in movement of a second associated pusher, the drawer corresponding to the first pusher being driven by the latter in its movement, and by the fact that each drawer has, on its periphery, towards its end distant of the pusher, a recess whose arrangement and length are such that before the end of the complete movement of the drawer during its drive by the first pusher, said recess establishes a connection between the inlet of pressurized fluid and the said chamber, the assembly being such that there is a rise in pressure of the fluid in this chamber which ensures the locking of the drawer and of the first pusher in the high position and, consequently, the locking of the other pusher and of the corresponding drawer in position low.

Les moyens de rappel de chaque poussoir peuvent comprendre des moyens de rappel élastiques, notamment formés par un ressort prenant appui à une extrémité contre le corps, et à l'autre extrémité contre le poussoir, des surfaces de butée étant prévues entre le poussoir et le tiroir pour permettre l'entraînement du tiroir par le poussoir.The return means of each pusher may comprise elastic return means, in particular formed by a spring bearing at one end against the body, and at the other end against the pusher, abutment surfaces being provided between the pusher and the drawer to allow the drawer to be driven by the pusher.

L'évidement prévu à la périphérie du tiroir peut être formé par un dégagement périphérique formant une gorge annulaire.The recess provided at the periphery of the drawer can be formed by a peripheral clearance forming an annular groove.

Le tiroir peut être un tiroir de régulation dont l'enfoncement est commandé, à partir du poussoir, par l'intermédiaire d'un ressort de tarage de telle sorte que la pression du fluide, à l'orifice de sortie, puisse être réglée. Dans ce cas, avantageusement, l'orifice de départ est prévu dans l'axe de l'alésage du tiroir de régulation, lequel comporte un canal axial débouchant à une extrémité vers ledit orifice de départ, la susdite. chambre étant prévue dans le corps du distributeur et étant située suivant la direction de l'axe de l'alésage entre la zone de cet alésage où débouche le canal axial et la gorge reliée à l'arrivée de pression.The drawer can be a regulation drawer, the insertion of which is controlled, from the pusher, by means of a setting spring so that the pressure of the fluid, at the outlet orifice, can be adjusted. In this case, advantageously, the starting orifice is provided in the axis of the bore of the regulating slide, which comprises an axial channel opening at one end towards said starting orifice, the aforesaid. chamber being provided in the body of the distributor and being located in the direction of the axis of the bore between the zone of this bore where the axial channel opens and the groove connected to the pressure inlet.

Le tiroir peut être un simple tiroir de distribution directement commandé par le poussoir ; la chambre est alors prévue, dans le corps de distributeur, à l'extrémité du tiroir opposée au poussoir.The drawer can be a simple dispensing drawer directly controlled by the pusher; the chamber is then provided, in the distributor body, at the end of the drawer opposite the pusher.

Avantageusement, tous les orifices d'arrivée de pression de fluide,de retour au réservoir, et de départ peuvent être prévus sur une même face de distributeur, généralement la face opposée à celle voisine de la came.Advantageously, all the fluid pressure inlet, return to the reservoir, and departure orifices can be provided on the same face of the distributor, generally the face opposite to that adjacent to the cam.

Le verrouillage est prévu de telle sorte qu'il soit possible,pour l'utilisateur, de surmonter l'effort de verrouillage en cas d'arrêt d'urgence ou par sécurité, en agissant sur la commande normale et en excerçant un effort raisonnable.The locking is provided in such a way that it is possible for the user to overcome the locking effort in the event of an emergency or safety stop, by acting on the normal control and exerting a reasonable effort.

On peut en outre prévoir une commande automatique du déverrouillage par exemple lorsqu'un mouvement est terminé, à l'aide d'un contact fin de course.It is also possible to provide automatic control of the unlocking, for example when a movement is finished, using a limit switch contact.

Cette commande de déverrouillage peut être effectuée en établissant une liaison, notamment par l'intermédiaire d'une électrovalve,entre les chambres correspondant à deux tiroirs associés.This unlocking command can be carried out by establishing a connection, in particular by means of an electrovalve, between the chambers corresponding to two associated drawers.

L'invention sera mieux comprise à l'aide de la description suivante de modes de réalisation particuliers mais non limitatif% représentés sur les dessins annexés.

  • La figure 1, de ces dessins, est une représentation simplifiée d'un dispositif distributeur conforme à l'invention comportant des tiroirs de régulation.
  • La figure 2 représente une variante du distributeur de la figure 1.
  • La figure 3 est une représentation schématique partielle d'un distributeur selon l'invention comportant des tiroirs de distribution.
  • La figure 4, enfin, est une vue simplifiée de dessous par rapport à la figure l montrant le système de déverrouillage automatique.
The invention will be better understood with the aid of the following description of particular but non-limiting embodiments shown in the accompanying drawings.
  • Figure 1 of these drawings is a simplified representation of a dispensing device according to the invention comprising control drawers.
  • FIG. 2 represents a variant of the dispenser of FIG. 1.
  • Figure 3 is a partial schematic representation of a dispenser according to the invention comprising distribution drawers.
  • Figure 4, finally, is a simplified view from below compared to Figure l showing the automatic unlocking system.

En se reportant à la figure 1, on peut voir un dispositif distributeur de fluide 1 formé par un manipulateur hydraulique, notamment pour télécommande. Ce dispositif comprend un corps 2 muni d'alésages 3 à axes parallèles dans lesquels sont montés des tiroirs 4 associés deux par deux, de manière symétrique par rapport à l'axe A-A du corps. Généralement deux ou quatre alésaaes, ainsi que deux ou quatre tiroirs correspondants sont prévus dans le corps 2, diamètralement opposés deux à deux.Referring to Figure 1, we can see a fluid distributor device 1 formed by a hydraulic manipulator, in particular for remote control. This device comprises a body 2 provided with bores 3 with parallel axes in which are mounted drawers 4 associated two by two, symmetrically with respect to the axis A-A of the body. Generally two or four slots, as well as two or four corresponding drawers are provided in the body 2, diametrically opposite two by two.

Chaque tiroir 4 est commandé par un poussoir 5 actionné par une came oscillante 6 ou analogue. La came 6 forme une sorte de plateau fixé à un levier de commande 7 articulé autour du point O. Chaque tiroir 4 est propre à établir, en se déplaçant dans l'alésage3, les communications souhaitées entre une arrivée de fluide sous pression P située dans le corps 2, un réservoir de fluide à basse pression (non représenté) relié aux zones désignées par T et un orifice de départ D, correspondant à chaque alésage 3, vers un organe d'utilisation (non représenté) tel qu'un vérin hydraulique.Each drawer 4 is controlled by a pusher 5 actuated by an oscillating cam 6 or the like. The cam 6 forms a sort of plate fixed to a control lever 7 articulated around the point O. Each slide 4 is suitable for establishing, by moving in the bore 3, the desired communications between an inlet for pressurized fluid P located in the body 2, a low-pressure fluid reservoir (not shown) connected to the areas designated by T and a starting orifice D, corresponding to each bore 3, towards a user member (not shown) such as a hydraulic cylinder .

Chaque alésage 3 comporte une gorge annulaire 8 reliée à l'arrivée de fluide sous pression P. Chaque tiroir 3 est combiné avec une chambre 9 limitée par au moins une surface annulaire transversale b des tiroirs. Cette chambre 9 est reliée à une canalisation 10 conduisant au réservoir par l'intermédiaire d'un étranglement e avantageusement formé par un gicleur 11 à ajutage calibré monté dans une canalisation 12 reliant la chambre 9 au conduit 10.Each bore 3 has an annular groove 8 connected to the pressurized fluid inlet P. Each drawer 3 is combined with a chamber 9 limited by at least one annular transverse surface b of the drawers. This chamber 9 is connected to a pipe 10 leading to the reservoir via a throttle e advantageously formed by a nozzle 11 with calibrated nozzle mounted in a pipe 12 connecting the chamber 9 to the pipe 10.

Dans la réalisation de la figure 1, chaque tiroir 4 est un tiroir de régulation dont l'enfoncement, dans l'alésage 3, est commandé à partir du poussoir 5 par l'intermédiaire d'un ressort de tarage 13.In the embodiment of FIG. 1, each drawer 4 is a regulation drawer whose insertion, in the bore 3 is controlled from the pusher 5 by means of a calibration spring 13.

Dans la solution représentée sur la figure 1, l'orifice de sortie ou de départ D associé à l'alésage 3 est prévu dans l'axe de cet alésage; le tiroir 4 comporte un canal axial 14 débouchant à son extrémité 15 tournée vers l'orifice D. Des canaux radiaux, 16, 17 sont prévus en des endroits appropriés, suivant la direction axiale, pour établir les connexions souhaitées lors du déplacement du tiroir 4.In the solution represented in FIG. 1, the outlet or departure orifice D associated with the bore 3 is provided in the axis of this bore; the drawer 4 has an axial channel 14 opening at its end 15 facing the orifice D. Radial channels, 16, 17 are provided in appropriate places, in the axial direction, to establish the desired connections during the movement of the drawer 4 .

L'extrémité 15, lorsque le tiroir 4 est enfoncé, vient en aqoui contre une rondelle 18 en butée centre le conps 2 et repousse CEtte rondelle à l'encontre d'un ressort 19 logé dans un espace cylindrique 20 communiquant axialement avec l'orifice de départ D et prévu vers ladite extrémité 15.The end 15, when the drawer 4 is pushed in, comes into contact with a washer 18 in abutment center the conps 2 and pushes this washer against a spring 19 housed in a cylindrical space 20 communicating axially with the orifice starting point D and provided towards said end 15.

La zone d'extrémité 15, du tiroir 4, a un diamètre f plus faible que celui de l'alésage 3 (le diamètre de l'alésage 3 est égal, au jeu de fonctionnement près, à celui de la majeure partie du tiroir 4). La surface annulaire transversale b est formée par l'épaulement marquant la transition entre la zone d'extrémité 15 et le reste du tiroir. La chambre 9 est prévue dans le corps du distributeur et est située, suivant la direction de l'axe de l'alésage, entre la zone 21 de cet alésage où débouche le canal axial 14, et la gorge 8 reliée à l'arrivée de pression P.The end zone 15 of the drawer 4 has a smaller diameter f than that of the bore 3 (the diameter of the bore 3 is, apart from the operating clearance, that of the major part of the drawer 4 ). The transverse annular surface b is formed by the shoulder marking the transition between the end zone 15 and the rest of the drawer. The chamber 9 is provided in the body of the distributor and is located, in the direction of the axis of the bore, between the zone 21 of this bore where the axial channel 14 opens, and the groove 8 connected to the inlet of pressure P.

Le dispositif distributeur 1 comporte des moyens de rappel R de chaque poussoir 5 propres à maintenir un premier poussoir contre la came 6 lorsque celle-ci a tendance à s'éloigner dudit poussoir lors du mouvement d'enfoncement d'un deuxième poussoir diamétralement opposé. Selon la représentation de la figure 1, cela signifie que le premier poussoir 5 est maintenu en appui contre la came 6 lorsque la région de celle-ci, en appui contre le poussoir, se déplace vers le haut.The dispensing device 1 comprises return means R of each pusher 5 suitable for maintaining a first pusher against the cam 6 when the latter tends to move away from said pusher during the driving-in movement of a second diametrically opposite pusher. According to the representation of FIG. 1, this means that the first pusher 5 is held in abutment against the cam 6 when the region of the latter, in abutment against the pusher, moves upwards.

Ces moyens de rappel R comprennent avantageusement des moyens de rappel élastiques formés par un ressort 22 prenant appui, à une extrémité, contre le corps 2 et, à son autre extrémité, contre le poussoir 5, notamment par l'intermédiaire d'une coupelle 23. Des surfaces de butée 24,25, sont prévues entre le poussoir 5 et le tiroir 4 pour permettre l'entraînement du tiroir, par le poussoir 5 sous l'action du ressort 23, dans un mouvement vers le haut selon la représentation de la figure 1. Plus précisément, la surface de butée 24 du poussoir 5 est obtenue à l'aide de deux demi-rondelles séparées suivant un diamètre, insérées entre la coupelle 23 et la base du poussoir 5. La surface de butée 25 est formée par un épaulement transversal de la tête 25a d'un plongeur 26 solidaire du tiroir 4. La tête 25a est située dans un alésage borgne 27 du poussoir 5, la longueur axiale de cet alésage borgne 27 permettant un débattement, vers le haut par rapport au poussoir, de la tête 25a. La coupelle 23 et le poussoir 5 coulissent dans un alésage 28 prévu dans une partie supérieure 2a, rapportée,du corps de distributeur. L'alésage 28 est fermé par un bouchon 29, vissé dans l'extrémité filetée de l'alésage 28, et dont la face transversale intérieure 29a sert de butée fin de course au poussoir 5.These return means R advantageously comprise elastic return means formed by a spring 22 bearing, at one end, against the body 2 and, at its other end, against the pusher 5, in particular by means of a cup 23. Stop surfaces 24, 25 are provided between the pusher 5 and the drawer 4 to allow the drawer to be driven, by the pusher 5 under the action of the spring 23, in an upward movement according to the representation in FIG. 1. More specifically, the abutment surface 24 of the pusher 5 is obtained at using two semi-washers separated according to a diameter, inserted between the cup 23 and the base of the pusher 5. The abutment surface 25 is formed by a transverse shoulder of the head 25a of a plunger 26 secured to the drawer 4. The head 25a is located in a blind bore 27 of the pusher 5, the axial length of this blind bore 27 allowing a movement, upwards relative to the pusher, of the head 25a. The cup 23 and the pusher 5 slide in a bore 28 provided in an upper part 2a, attached, of the distributor body. The bore 28 is closed by a plug 29, screwed into the threaded end of the bore 28, and the internal transverse face 29a of which serves as a limit stop for the pusher 5.

Chaque tiroir 4 comporte, sur sa périphérie, vers son extrémité 15 éloignée du poussoir, un évidement gavan- tageusement constitué par un dégagement périphérique formant une gorge annulaire 30 située entre la zone d'extrémité 15 du tiroir 4, et le reste du tiroir.Each drawer 4 has, on its periphery, towards its end 15 remote from the pusher, a cavity advantageously constituted by a peripheral recess forming an annular groove 30 situated between the end zone 15 of the drawer 4, and the rest of the drawer.

La disposition de cette gorge 30 suivant l'axe du tiroir 4, et sa longueur sont telles qu'avant la fin du déplacement complet du tiroir 4 lors de son entraînement (vers le haut selon la représentation de la figure 1) par le poussoir 5, ledit évidement ou gorge 30 établit une liaison entre la gorge 8 d'arrivée de fluide sous pression et la chambre 9 . De ce fait il y a montée en pression du fluide dans cette chambre,ce qui assure le verrouillage hydraulique du tiroir 4 et du poussoir 5 en position haute et par conséquent le verrouillage du poussoir et du tiroir diamétralement opposé, correspondant, en position basse.The arrangement of this groove 30 along the axis of the drawer 4, and its length are such that before the end of the complete displacement of the drawer 4 during its drive (upwards according to the representation of FIG. 1) by the pusher 5 , said recess or groove 30 establishes a connection between the groove 8 for the arrival of pressurized fluid and the chamber 9. As a result there is an increase in fluid pressure in this chamber, which ensures the hydraulic locking of the drawer 4 and of the pusher 5 in the high position and consequently the locking of the pusher and of the corresponding diametrically opposite drawer in the low position.

La surface de butée 29a du bouchon 29 est située de telle sorte que le poussoir 5 puisse effectuer une course suffisamment longue pour que la gorge 30 vienne communiquer avec la gorge 8.The abutment surface 29a of the plug 29 is located so that the pusher 5 can travel long enough for the groove 30 to come into communication with the groove 8.

L'écoulement permanent qui s'établit à travers le gicleur 11 crée une perte de charge assurant le maintien d'une pression suffisante dans la chambre 9 pour le verrouillage hydraulique.The permanent flow which is established through the nozzle 11 creates a pressure drop ensuring the maintenance of sufficient pressure in the chamber 9 for hydraulic locking.

Ce verrouillage est prévu de telle sorte qu'il soit possible, pour l'utilisateur, de surmonter l'effort de verrouillage hydraulique en cas d'arrêt d'urgence ou par sécurité en exerçant un effort raisonnable sur le levier 7.This locking is provided in such a way that it is possible for the user to overcome the hydraulic locking effort in the event of an emergency stop or for safety reasons by exerting a reasonable effort on the lever 7.

Une commande automatique de déverrouillage peut être prévue par exemple lorsqu'un mouvement de levage commandé par l'organe d'utilisation (non représenté) branché sur l'orifice de départ D est terminé.An automatic unlocking control can be provided for example when a lifting movement controlled by the operating member (not shown) connected to the starting orifice D is completed.

Comme visible sur la figure 4, cette commande de déverrouillage comprend un ensemble 31 de canalisations de liaison entre les deux chambres 9 des tiroirs 4 diamétralement opposés. Le passage du fluide, dans cet ensemble de canalisation 31 est commandé par une électrovalve 32 dont le tiroir 33 est logé dans un tronçon de canalisation de l'ensemble 31. Lorsque la communication entre les deux chambres 9 diamétralement opposées est coupée par le tiroir 33, le verrouillage hydraulique peut avoir lieu. Lorsque la communication entre les deux chambres 9 opposées est établie par le tiroir 33, il y a égalisation de pressions dans les chambres et déverrouillage,notamment du fait que le ressort 19 comprimé par le tiroir 4 enfoncé peut repousser ce tiroir 4 et donc la came 6 vers la position neutre.As can be seen in FIG. 4, this unlocking command comprises a set 31 of connecting pipes between the two chambers 9 of the diametrically opposite drawers 4. The passage of the fluid in this pipe assembly 31 is controlled by a solenoid valve 32 whose drawer 33 is housed in a pipe section of the assembly 31. When the communication between the two diametrically opposed chambers 9 is cut by the drawer 33 , the hydraulic locking can take place. When the communication between the two opposite chambers 9 is established by the drawer 33, there is pressure equalization in the chambers and unlocking, in particular because the spring 19 compressed by the pressed drawer 4 can push this drawer 4 and therefore the cam 6 to the neutral position.

La commande de l'électrovalve 32 peut être assurée par un contact fin de course (non représenté) commandant le déverrouillage en fin de mouvement, par exemple d'un vérin branché sur l'orifice D, ou sur un distributeur à commande hydraulique piloté par la pression issue de l'orifice D, par déplacement du tiroir 33.The control of the solenoid valve 32 can be ensured by a limit switch contact (not shown) controlling the unlocking at the end of movement, for example of a jack connected to the orifice D , or on a distributor with hydraulic control controlled by the pressure from the orifice D, by displacement of the slide 33.

Le fonctionnement du dispositif distributeur représenté sur la figure 1 est le suivant.The operation of the dispensing device shown in Figure 1 is as follows.

Au repos, le levier de commande 7 est maintenu par les ressorts 19 en position neutre.At rest, the control lever 7 is held by the springs 19 in neutral position.

Lorsqu'on incline le levier dans un sens, le poussoir 5 correspondant est actionné par la came 6 y compris le ressort de tarage 16 correspondant qui pousse le tiroir de régulation 4 vers le bas.When the lever is tilted in one direction, the corresponding pusher 5 is actuated by the cam 6 including the corresponding calibration spring 16 which pushes the regulation slide 4 downwards.

Au début de la course du tiroir 4, on supprime la liaison qui existait, en position neutre, entre l'orifice de départ D et l'échappement T; la course d'enfoncement du tiroir 4 se poursuivant, la liaison entre la gorge 8 d'arrivée de pression et l'orifice de départ D s'établit par l'intermédiaire du canal radial 17 et du canal axial 14.At the start of the travel of the slide 4, the connection which existed, in neutral position, between the starting orifice D and the exhaust T is removed; as the slide-in stroke of the slide 4 continues, the connection between the pressure inlet groove 8 and the starting orifice D is established by means of the radial channel 17 and the axial channel 14.

Simultanément, l'autre poussoir 5,diamétralement opposé à celui qui est enfoncé, est maintenu en contact contre la came 6 par l'effet du ressort correspondant 22. Le tiroir 4 et le plongeur 26 montent progressivement jusqu'au moment où l'évidement g (gorge 30) met en communication la gorge 8 avec la chambre 9 correspondante. L'écoulement de fluide qui en résulte dans la chambre 9, à travers le gicleur 11, crée une perte de charge et une augmentation de pression dans la chambre 9.Cette pression provoque la montée du tiroir 4 et du plongeur 26 qui va venir en butée contre le fond de l'alésage borgne 27. Le poussoir 5 correspondant monte à son tour entraînant la came 6 et le levier 7.Simultaneously, the other pusher 5, diametrically opposite to that which is depressed, is kept in contact against the cam 6 by the effect of the corresponding spring 22. The slide 4 and the plunger 26 progressively rise until the recess g (groove 30) connects the groove 8 with the corresponding chamber 9. The resulting flow of fluid in the chamber 9, through the nozzle 11, creates a pressure drop and an increase in pressure in the chamber 9. This pressure causes the slide 4 and the plunger 26 which will come up abutment against the bottom of the blind bore 27. The corresponding push-button 5 goes up in turn driving the cam 6 and the lever 7.

Le verrouillage hydraulique est effectué. L'utilisateur peut lâcher le levier 7 sans que la fonction de distribution soit interrompue.Hydraulic locking is performed. The user can release the lever 7 without the dispensing function being interrupted.

En fin d'opération, comme expliqué précédemment, l'électrovalve 32 établit,par son tiroir 33, une communication entre les chambres9 diamétralement opposés et l'égalisation des pressions dans ces chambres 9 entraînent le déverrouillage et le retour du levier 7 en position 9, notamment du fait de l'action de celui des ressorts 19 qui est comprimé.At the end of the operation, as explained above, the solenoid valve 32 establishes, through its drawer 33, communication between the diametrically opposed chambers 9 and the equalization of the pressures in these chambers 9 cause the lever 7 to be unlocked and returned to position 9 , in particular due to the action of that of the springs 19 which is compressed.

Les gicleurs 11,qui établissent une communication avec le réservoir, permettent la décompression des chambres 9.The nozzles 11, which establish a communication with the tank, allow the decompression of the bedrooms 9.

En cas d'arrêt d'urgence, et par sécurité, l'utilisateur peut à tout moment revenir en position neutre en agissant sur le levier 7 avec un effort raisonnable.In the event of an emergency stop, and for safety reasons, the user can return to neutral position at any time by acting on lever 7 with reasonable effort.

Comme visible sur les figures 1 et 4, tous les orifices d'arrivée de fluide sous pression, de retour au réservoir et de départ sont avantageusement prévus sur une même face du distributeur 1; selon la représentation de la figure 1, il s'agit de la face inférieure éloignée de la came 6.As can be seen in FIGS. 1 and 4, all the openings for the arrival of pressurized fluid, for return to the reservoir and for departure are advantageously provided on the same face of the distributor 1; according to the representation in FIG. 1, this is the lower face remote from the cam 6.

Le tracé des canalisations dans le corps 2 est particulièrement simple, notamment en raison de la situation de l'orifice de départ D dans le prolongement axial du canal 14.The layout of the pipes in the body 2 is particularly simple, in particular because of the situation of the starting orifice D in the axial extension of the channel 14.

Généralement le corps 2 comporte une partie inférieure 2b, rapportée, comme visible sur la figure 1. La séparation entre la partie 2b et le corps 2 est effectuée avantageusement au niveau de la surface extrême de la Partie 15 du tiroir 4 en position neutre. Ainsi, l'alésage 3 dans lequel-coulisse la majeure partie du tiroir 4, et l'alésage dans lequel coulisse la partie d'extrémité 15 sont prévus dans la même pièce 2 et leur concentricité peut être obtenue dans de bonnes conditions, lors de la fabrication.Generally, the body 2 has a lower part 2b, attached, as visible in FIG. 1. The separation between the part 2b and the body 2 is advantageously carried out at the end surface of the Part 15 of the drawer 4 in the neutral position. Thus, the bore 3 in which the major part of the slide 4 slides, and the bore in which the end portion 15 slides are provided in the same part 2 and their concentricity can be obtained under good conditions, when the making.

La figure 2 illustre une variante de réalisation dans laquelle le dispositif distributeur est encore équipé de tiroirs de régulation. Les références numériques utilisées sur la figure 1 sont reprises, éventuellement accompagnées de la lettre c sur la figure 2, pour désigner des éléments identiques ou jouant des rôles semblables. La description de ces éléments ne sera pas reprise en détail.FIG. 2 illustrates an alternative embodiment in which the dispensing device is still equipped with regulation drawers. The numerical references used in FIG. 1 are repeated, possibly accompanied by the letter c in FIG. 2, to designate identical elements or playing similar roles. The description of these elements will not be repeated in detail.

On notera essentiellement les différences de réalisation entre la figure 2 et la figure 1.The differences in construction between FIG. 2 and FIG. 1 will essentially be noted.

Les chambres 9c sont prévues à l'extrémité de l'alésage 3 dans lequel coulisse le tiroir 4c. La surface transversale b limitant en partie la chambre 9c est formée par la surface annulaire frontale d'extrémité du tiroir 4c. Ce tiroir comporte un canal axial 14 se transformant,dans la zone tournée vers la chambre 9c, en un logement cylindrique 34 de plus fort diamètre, qui s'ouvre vers la chambre 9c. Une aiguille 35 est montée coulissante, de manière étanche, dans ce logement 34; cette aiguille 35 cylindrique prend appui, à une extrémité, contre le fond de la chambre 9c. Les deux extrémités de l'aiguille 35 sont arrondies.The chambers 9c are provided at the end of the bore 3 in which the drawer 4c slides. The transverse surface b partially limiting the chamber 9c is formed by the frontal annular end surface of drawer 4c. This drawer has an axial channel 14 transforming, in the area facing the chamber 9c, into a cylindrical housing 34 of larger diameter, which opens towards the chamber 9c. A needle 35 is slidably mounted in a sealed manner in this housing 34; this cylindrical needle 35 bears, at one end, against the bottom of the chamber 9c. The two ends of the needle 35 are rounded.

Le ressort 19 est comprimé entre le fond de la chambre 9c et et un rebord annulaire tourné vers l'extérieur d'une douille 36 montée sur la zone d'extrémité du tiroir 4c; la douille 36 comporte un rebord intérieur 37 en appui contre la surface transversale b du tiroir 4c.The spring 19 is compressed between the bottom of the chamber 9c and and an annular flange facing outwards from a bush 36 mounted on the end zone of the drawer 4c; the sleeve 36 has an inner rim 37 bearing against the transverse surface b of the drawer 4c.

Alors que sur la figure 1, le départ du fluide destiné à l'organe d'utilisation, par exemple un vérin, s'effectuait suivant l'axe du tiroir 4, dans la réalisation de la figure 2, ce départ s'effectue à partir d'une canalisation radiale 38 prévue dans le coros 2 entre la gorge 8 et la zone d'appui du ressort 22. Le tiroir 4c comporte, sur sa périphérie, entre les canaux radiaux 16 et 17, une gorge annulaire 39 reliée au canal axial 14 et destinée à établir la communication entre la gorge 8 d'arrivée de fluide sous pression et la canalisation de départ 38.While in FIG. 1, the departure of the fluid intended for the member of use, for example a jack, was carried out along the axis of the drawer 4, in the embodiment of FIG. 2, this departure takes place at from a radial pipe 38 provided in the coros 2 between the groove 8 and the bearing area of the spring 22. The drawer 4c has, on its periphery, between the radial channels 16 and 17, an annular groove 39 connected to the channel axial 14 and intended to establish communication between the groove 8 for the arrival of pressurized fluid and the outlet pipe 38.

L'évidement g est formé par un dégagement péri-' phérique 40 prévu à l'extrémité du tiroir 4c.G The recess is formed by a clearance peri- p hérique 40 provided at the end of the drawer 4c.

La canalisation de départ 38 est reliée par un perçage, non représenté, à la face inférieure de la partie 2b.The starting pipe 38 is connected by a bore, not shown, to the underside of the part 2b.

Le fonctionnement du dispositif distributeur de la figure 2 est semblable à celui de la figure 1.The operation of the dispensing device of FIG. 2 is similar to that of FIG. 1.

Lorsqu'un poussoir 5 est enfoncé, le poussoir diamétralement opposé suit la came en montant et en entraînant le tiroir correspondant 4c.When a pusher 5 is pressed, the diametrically opposite pusher follows the cam while rising and driving the corresponding drawer 4c.

Lorsque l'évidement g, formé par le dégagement périphérique 40 arrive au niveau de la gorge 8 d'arrivée de fluide sous pression, la chambre 9c reçoit du fluide sous pression, et la perte de charge à travers le gicleur 11 provoque la montée en pression de cette chambre. L'aiguille 35 refonte alors dans son logement 34 sous l'effet de la pression et vient en butée contre le fond de ce logement. Le plongeur 4c monte également sous l'effet de la pression, et la tête 25a vient en butée contre le fond de l'alésage 27.When the recess g, formed by the peripheral clearance 40 arrives at the level of the groove 8 for the arrival of pressurized fluid, the chamber 9c receives pressurized fluid, and the pressure drop through the nozzle 11 causes the rise in pressure from this room. The needle 35 then recovers in its housing 34 under the effect of the pressure and abuts against the bottom of this housing. The plunger 4c also rises under the effect of the pressure, and the head 25a abuts against the bottom of the bore 27.

Le verrouillage hydraulique est obtenu dans les mêmes conditions que celles évoquées précédemment.Hydraulic locking is obtained under the same conditions as those mentioned above.

Le déverrouillage peut être assuré par la mise en communication des chambres 9c dans des conditions semblables à celles expliquées avec référence à la figure 4.Unlocking can be ensured by placing the chambers 9c in communication under conditions similar to those explained with reference to FIG. 4.

Il est à noter que si les ressorts 22 constituent des moyens de rappel simples et efficaces des poussoirs 5 pour les maintenir en appui contre la came 6 lorsque celle-ci a tendance à s'éloigner d'eux, on pourrait imaginer d'autres types de moyens de rappel, par exemple une liaison de type mécanique entre la came 6 et le poussoir 5.It should be noted that if the springs 22 constitute simple and effective means of returning the pushers 5 to keep them in abutment against the cam 6 when the latter tends to move away from them, one could imagine other types return means, for example a mechanical connection between the cam 6 and the pusher 5.

La figure 3 montre une variante de réalisation du dispositif distributeur selon laquelle le tiroir 4d est un simple tiroir de distribution dont l'enfoncement est commandé par la poussée mécanique directe du poussoir 5; pour cela, la tête 25d du plongeur lié au tiroir 4d est en appui contre le fond de l'alésage borgne 27 du poussoir 5. On retrouve, à l'extrémité du tiroir 4d, éloignée du poussoir 5, une chambre 9c telle que celle montrée sur la figure 2 et qui vient d'être décrite. L'évidement g est toujours formé par un dégagement périphérique annulaire 40 prévu à l'extrémité du tiroir 4d,dont la section est pleine.FIG. 3 shows an alternative embodiment of the dispensing device according to which the drawer 4d is a simple dispensing drawer, the insertion of which is controlled by the direct mechanical thrust of the pusher 5; for this, the head 25d of the plunger linked to the drawer 4d is in abutment against the bottom of the blind bore 27 of the pusher 5. There is, at the end of the drawer 4d, distant from the pusher 5, a chamber 9c such as that shown in Figure 2 and just described. The recess g is always formed by an annular peripheral clearance 40 provided at the end of the drawer 4d, the section of which is full.

Ce tiroir de distribution 4d comporte, dans sa zone centrale, une gorge à parois évasées 41 assurant les communications souhaitées lors du mouvement du tiroir 4d.This distribution drawer 4d has, in its central zone, a groove with flared walls 41 ensuring the desired communications during the movement of the drawer 4d.

On retrouve, bien entendu, le ressort 22 prévu entre le corps 2 et la coupelle 23 du poussoir 5.There is, of course, the spring 22 provided between the body 2 and the cup 23 of the pusher 5.

Le fonctionnement est semblable à celui décrit précédemment.The operation is similar to that described above.

Lorsqu'un poussoir 5 est enfoncé par la came 6, le poussoir diamétralement opposé reste en appui contre la came sous l'effet du ressort 22, et soulève le tiroir 4d. Pour une course suffisante de ce tiroir 4d vers le haut, la gorge 41 entre en communication avec la gorge 8 d'arrivée de fluide sous pression qui est ainsi admis dans la chambre 9c. Le verrouillage hydraulique se produit comme expliqué précédemment.When a pusher 5 is depressed by the cam 6, the diametrically opposite pusher remains in abutment against the cam under the effect of the spring 22, and raises the drawer 4d. For a sufficient stroke of this drawer 4d upwards, the groove 41 comes into communication with the groove 8 for the arrival of pressurized fluid which is thus admitted into the chamber 9c. Hydraulic locking occurs as explained above.

Le déverrouillage peut être obtenu automatiquement dans les mêmes conditions que celles expliquées avec référence aux figures 1 et 4.Unlocking can be obtained automatically under the same conditions as those explained with reference to Figures 1 and 4.

D'autres formes de tiroirs à sections différentielles pourraient être envisagées.Other forms of drawers with differential sections could be envisaged.

Il est à noter que le ressort 22 assure le contact permanent du poussoir 5 avec la came 6 et contribue à éviter les chocs entre ces deux parties. Le ressort 19 assure le maintien en position neutre quand le manipulateur est déverrouillé.It should be noted that the spring 22 ensures permanent contact of the pusher 5 with the cam 6 and helps to avoid impacts between these two parts. The spring 19 maintains the neutral position when the manipulator is unlocked.

Claims (9)

1 - Dispositif distributeur de fluide, notamment pour télécommande comprenant un corps muni d'alésages à axes parallèles dans lesquels sont montés des tiroirs coulissants associés deux par deux, notamment de manière symétrique par rapport à l'axe du corps, ces tiroirs étant commandés par des poussoirs actionnés par une came oscillante ou analogue pour établir les communications souhaitées entre une arrivée de fluide sous pression, un réservoir de fluide à basse pression, et un orifice de départ vers un organe d'utilisation, chaque alésage de tiroir comportant une gorge reliée à l'arrivée de fluide sous pression, chaque tiroir étant combiné avec une chambre limitée par au moins une surface annulaire transversale du tiroir et reliée au réservoir par un étranglement, caractérisé par le fait qu'il comporte des moyens de rappel (R) de chaque poussoir (5) propres à maintenir un premier poussoir en appui permanent contre la came (6) lorsque celle-ci a tendance à s'éloigner dudit poussoir lors du mouvement d'enfoncement d'un deuxième poussoir associé, le tiroir (4) correspondant au premier poussoir étant entraîné par celui-ci dans son mouvement, etpar le fait que chaque tiroir comporte, sur sa périphérie, vers son extrémité (15) éloignée du poussoir, un évidement (g) dont la disposition et la longueur sont telles qu'avant la fin du déplacement complet du tiroir (4) lors de son entraînement par le premier poussoir, ledit évidement établisse une liaison entre l'arrivée de fluide sous pression (p,8)et la susdite chambre (9), l'ensemble étant tel qu'il y ait une montée de pression du fluide dans cette chambre (9) qui assure le verrouillage du tiroir (4) et du premier poussoir (5) en position haute et, par conséquent, le verrouillage de l'autre poussoir et du tiroir correspondant en position basse. 2 - Dispositif selon la revendication 1caractérisé par le fait que les moyens de rappel (R) comprennent des moyens de rappel élastiques, notamment formés par un ressort (22) prenant appui à une extrémité contre le corps (2), et à l'autre extrémité contre le poussoir (5), des surfaces de butée (24,25) étant prévues entre le poussoir et le tiroir pour permettre l'entraînement du tiroir par le poussoir.1 - Fluid distributor device, in particular for remote control comprising a body provided with bores with parallel axes in which are mounted sliding drawers associated in pairs, in particular symmetrically with respect to the axis of the body, these drawers being controlled by pushers actuated by an oscillating cam or the like to establish the desired communications between a pressurized fluid inlet, a low pressure fluid reservoir, and a starting orifice towards a user member, each drawer bore having a connected groove on the arrival of pressurized fluid, each drawer being combined with a chamber limited by at least one transverse annular surface of the drawer and connected to the reservoir by a throttle, characterized in that it comprises return means (R) of each pusher (5) capable of maintaining a first pusher in permanent support against the cam (6) when the latter tends to move away from said pusher during of the driving-in movement of a second associated pusher, the drawer (4) corresponding to the first pusher being driven by the latter in its movement, and by the fact that each drawer has, on its periphery, towards its remote end (15) of the pusher, a recess (g) whose arrangement and length are such that before the end of the complete displacement of the drawer (4) during its drive by the first pusher, said recess establishes a connection between the arrival of fluid under pressure (p, 8 ) and the aforesaid chamber (9), the assembly being such that there is a rise in pressure of the fluid in this chamber (9) which ensures the locking of the drawer (4) and the first pusher ( 5) in the high position and, consequently, the locking of the other pusher and of the corresponding drawer in the low position. 2 - Device according to claim 1caractérisé in that the return means (R) comprise elastic return means, in particular formed by a spring (22) bearing at one end against the body (2), and at the other end against the pusher (5), abutment surfaces (24,25) being provided between the pusher and the drawer to allow the drawer to be driven by the pusher. 3 - Dispositif selon la revendication 1 ou 2, caractérisé-par le fait que l'évidement (g) prévu à la périphérie du tiroir (4) est formé par un dégagement périphérique formant une gorae annulaire (30; 40).3 - Device according to claim 1 or 2, characterized in that the recess (g) provided at the periphery of the drawer (4) is formed by a peripheral clearance forming an annular gorae (30; 40). Dispositif selon l'une quelconque des revendications précédentes dans lequel le tiroir est un tiroir de régulation dont l'enfoncement est commandé, à partir du poussoir, par l'intermédiaire d'un ressort de tarage de telle sorte que la pression du fluide, à l'orifice de sortie, puisse être réglée , caractérisé par le fait que l'orifice de départ (D) est prévu dans l'axe de l'alésage (3) du tiroir de régulation (4), lequel comporte un canal axial (14) débouchant à une extrémité (15) vers ledit orifice de départ (D), la susdite chambre (9) étant prévue dans le corps (2) du distributeur et étant située suivant la direction de l'axe de l'alésage entre la zone (21) de cet alésage où débouche le canal axial (14) et la gorge (8) reliée à l'arrivée de pression (P). 5 - Dispositif selon l'une quelconque des revendications 1 à 3 dans lequel le tiroir est un tiroir de régulation dont l'enfoncement est commandé, à partir du poussoir, par l'intermédiaire d'un ressort de tarage de telle sorte que la pression du fluide, à l'orifice de sortie, puisse être réglée, caractérisé par le fait que la chambre (9c) est prévue à l'extrémité de l'alésage (3) dans lequel coulisse le tiroir (4c), ce tiroir comportant un canal axial (14) qui se transforme dans la zone tournée vers la chambre (9c) en un logement cylindrique (34) s'ouvrant vers la chambre et dans lequel une aiguille (35) est montée coulissante de manière étanche, cette aiguille (35) prenant appui à une extrémité contre le fond de la chambre (9c), une canalisation (38) étant prévue dans le corps (2) entre une gorge (8) reliée à l'arrivée de pression et la zone d'appui du ressort de tarage (22) et cette canalisation (38) servant de canalisation de départ.Device according to any one of the preceding claims, in which the drawer is a regulation drawer, the insertion of which is controlled, from the pusher, by means of a calibration spring so that the pressure of the fluid, at the outlet orifice can be adjusted, characterized in that the starting orifice (D) is provided in the axis of the bore (3) of the regulating slide (4), which has an axial channel ( 14) opening at one end (15) towards said starting orifice (D), the aforesaid chamber (9) being provided in the body (2) of the distributor and being located in the direction of the axis of the bore between the zone (21) of this bore where the axial channel (14) and the groove (8) connected to the pressure inlet (P) open. 5 - Device according to any one of claims 1 to 3 wherein the drawer is a regulation drawer whose penetration is controlled, from the pusher, by means of a calibration spring so that the pressure fluid, at the outlet, can be adjusted, characterized in that the chamber (9c) is provided at the end of the bore (3) in which the drawer (4c) slides, this drawer comprising a axial channel (14) which transforms in the zone facing the chamber (9c) into a cylindrical housing (34) opening towards the chamber and in which a needle (35) is slidably mounted in a sealed manner, this needle (35 ) taking support from one end against the bottom of the chamber (9c), a pipe (38) being provided in the body (2) between a groove (8) connected to the pressure inlet and the bearing area of the calibration spring (22 ) and this pipe (38) serving as the starting pipe. 6 - Dispositif selon l'une quelconque des revendications 1 à 3 dans lequel le tiroir est un tiroir de distribution caractérisé par le fait que la chambre (9c) est prévue à l'extrémité du tiroir (4d) opposée au poussoir (5), l'enfoncement du tiroir étant commandé par la poussée mécanique directe du poussoir (5), l'évidement (g) étant formé par un dégagement périphérique annulaire(40)prévu à l'extrémité du tiroir (4d).6 - Device according to any one of claims 1 to 3 in which the drawer is a dispensing drawer characterized in that the chamber (9c) is provided at the end of the drawer (4d) opposite the pusher (5), the insertion of the drawer being controlled by the direct mechanical thrust of the pusher (5), the recess (g) being formed by an annular peripheral clearance (40) p revised at the end of the drawer (4d). 7 - Dispositif selon l'une quelconque des précédentes revendications caractérisé par le fait qu'il comporte une commande automatique de verrouillage comprenant un ensemble de canalisations de liaison entre les deux chambres (9, 9c) des tiroirs diamétralement opposés le passage du fluide dans cet ensemble de canalisations (31) étant commandé par un tiroir (33) logé dans un tronçon de canalisation de l'ensemble (31).7 - Device according to any one of the preceding claims, characterized in that it comprises an automatic locking control comprising a set of connecting pipes between the two chambers (9, 9c) of the drawers diametrically opposite the passage of the fluid in this set of pipes (31) being controlled by a drawer (33) housed in a section of pipe of the set (31). 8 - Dispositif selon la revendication 7 caractérisé par le fait que le tiroir (33) est celui d'une électrovalve (32), notamment commandée par un contact fin de course.8 - Device according to claim 7 characterized in that the slide (33) is that of a solenoid valve (32), in particular controlled by a limit switch contact. 9 - Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'étranglement (e) de liaison entre chaque chambre (9c) et le réservoir est formé par un gicleur (11)monté dans une canalisation (12) reliant les chambres à une -canalisation(10)conduisant au réservoir.9 - Device according to any one of the preceding claims, characterized in that the constriction (e) connecting between each chamber (9c) and the tank is formed by a nozzle (11) mounted in a pipe (12) connecting the chambers with a channeling (10) leading to the reservoir. 10 - Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que les orifices d'arrivée de fluide sous pression,de retour au réservoir et de départ, sont prévus sur une même face du distributeur, généralement la face opposée à celle voisine de la came (6).10 - Device according to any one of the preceding claims, characterized in that the pressurized fluid inlet, return to the reservoir and outlet orifices are provided on the same face of the distributor, generally the face opposite to that next to the cam (6). 11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il comporte un ressort (19), logé dans un espace (20) prévu vers l'extrémité (15) du tiroir (4) tournée vers l'orifice de départ (D), pour assurer le maintien du tiroir en position neutre lorsque le dispositif est déverrouillé.11. Device according to any one of the preceding claims, characterized in that it comprises a spring (19), housed in a space (20) provided towards the end (15) of the drawer (4) facing towards starting orifice (D), to ensure that the drawer is kept in the neutral position when the device is unlocked.
EP84400311A 1983-02-15 1984-02-15 Fluid distribution device, particularly for a remote control Expired EP0117806B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400311T ATE21148T1 (en) 1983-02-15 1984-02-15 FLUID DISTRIBUTOR, PARTICULARLY FOR REMOTE CONTROL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8302397 1983-02-15
FR8302397A FR2540959B1 (en) 1983-02-15 1983-02-15 FLUID DISPENSING DEVICE, PARTICULARLY FOR REMOTE CONTROL

Publications (2)

Publication Number Publication Date
EP0117806A1 true EP0117806A1 (en) 1984-09-05
EP0117806B1 EP0117806B1 (en) 1986-07-30

Family

ID=9285926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400311A Expired EP0117806B1 (en) 1983-02-15 1984-02-15 Fluid distribution device, particularly for a remote control

Country Status (6)

Country Link
US (1) US4566492A (en)
EP (1) EP0117806B1 (en)
JP (1) JPS59164478A (en)
AT (1) ATE21148T1 (en)
DE (1) DE3460368D1 (en)
FR (1) FR2540959B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0567698A1 (en) * 1992-04-29 1993-11-03 Kayaba Industry Co., Ltd. Input apparatus
FR2709166A1 (en) * 1993-08-17 1995-02-24 Kubota Kk Hydraulic pilot valve.
EP0716235A3 (en) * 1994-11-10 1996-09-25 Kawasaki Heavy Ind Ltd Hydraulic operated valve

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6140571U (en) * 1984-08-20 1986-03-14 日本発条株式会社 air valve
JPH0440051Y2 (en) * 1986-01-23 1992-09-18
US5507317A (en) * 1992-04-29 1996-04-16 Kayaba Industry Co., Ltd. Input apparatus
US5251534A (en) * 1992-04-29 1993-10-12 Kayaba Industry Co. Ltd. Input apparatus
US5983863A (en) * 1993-05-06 1999-11-16 Cummins Engine Company, Inc. Compact high performance fuel system with accumulator
WO1994027041A1 (en) * 1993-05-06 1994-11-24 Cummins Engine Company, Inc. Compact high performance fuel system with accumulator
US5353766A (en) * 1993-09-08 1994-10-11 Cummins Engine Company, Inc. Distributor for a high pressure fuel system
US5823227A (en) * 1994-11-14 1998-10-20 Komatsu, Ltd. Hydraulic pilot valve
DE19532942C1 (en) * 1995-09-07 1997-01-02 Skibowski Martin Distributor device for selective connection of conduits of first field with those of second field
US5653420A (en) * 1995-11-13 1997-08-05 Ingersoll-Rand Company Locking control valve handle
JP3337121B2 (en) * 1997-05-22 2002-10-21 川崎重工業株式会社 Pilot valve
FR2857488A1 (en) * 2003-07-11 2005-01-14 Bosch Rexroth Dsi Sas Remote control for public works vehicle, has plunger movable towards exit position opposed to pushed position along axial direction in body cavity, and detection unit detecting plunger position
FR2857489B1 (en) * 2003-07-11 2006-06-09 Bosch Rexroth Dsi Sas REMOTE CONTROL FOR PUBLIC WORKS MACHINES WITH PUSHER FOLLOWER
FR2857706B1 (en) * 2003-07-17 2007-05-04 Bosch Rexroth Dsi Sas PRESSURIZED FLUID DISPENSER DEVICE WITH DOUBLE CONTROL SPRINGS
CN100359188C (en) * 2004-03-19 2008-01-02 王冠军 Hydraulic selector valve
DE102015216149A1 (en) 2015-08-25 2017-03-02 Robert Bosch Gmbh Hydraulic control device with variable return bias
DE102015221713A1 (en) 2015-11-05 2017-05-11 Robert Bosch Gmbh Pipe rupture protection with two hydraulic actuators
IT201600127801A1 (en) * 2016-12-16 2018-06-16 Walvoil Spa HYDRAULIC SERVO WITH DIFFERENTIAL AREA
KR102257572B1 (en) * 2019-11-04 2021-05-31 (주)대현하이드로릭스 An improved leverage device of a remote hydraulic pressure of control valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451162A (en) * 1943-12-08 1948-10-12 Bendix Westinghouse Automotive Valve mechanism
FR2237076A1 (en) * 1973-05-02 1975-02-07 Rexroth Sigma Hydraulic distributor valve for remote control - selects required outlet and controls delivery press. in outlet pipe
DE3216659A1 (en) * 1981-07-09 1983-01-27 Fiat Allis Europe S.p.A., 73014 Lecce MANUAL ACTUABLE HYDRAULIC CONTROL DEVICE WITH HYDRAULIC POSITION LOCK

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820372A (en) * 1954-02-02 1958-01-21 Dewandre Co Ltd C Control valve for fluid pressure remote control systems
DE1939293A1 (en) * 1969-08-01 1971-02-11 Kracht Pumpen Motoren Pressure regulator
DE2152133B1 (en) * 1971-10-20 1973-02-22 Rexroth Gmbh G L HYDRAULICALLY ACTUATED CONTROL VALVE
SE397390B (en) * 1974-11-07 1977-10-31 Nordhydraulic Ab DEVICE FOR HYDRAULIC CONTROL OF CENTRATED MULTILEGE DIRECTION VALVE
FR2376978A1 (en) * 1977-01-06 1978-08-04 Rexroth Sigma IMPROVEMENTS TO FLUID DISTRIBUTOR DEVICES, ESPECIALLY FOR HYDRAULIC REMOTE CONTROL
US4341243A (en) * 1980-06-16 1982-07-27 Caterpillar Tractor Co. Pressure reducing valve with floating stem for make-up vent
US4342335A (en) * 1980-10-23 1982-08-03 Koehring Company Hydraulic valve detent mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451162A (en) * 1943-12-08 1948-10-12 Bendix Westinghouse Automotive Valve mechanism
FR2237076A1 (en) * 1973-05-02 1975-02-07 Rexroth Sigma Hydraulic distributor valve for remote control - selects required outlet and controls delivery press. in outlet pipe
DE3216659A1 (en) * 1981-07-09 1983-01-27 Fiat Allis Europe S.p.A., 73014 Lecce MANUAL ACTUABLE HYDRAULIC CONTROL DEVICE WITH HYDRAULIC POSITION LOCK

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0567698A1 (en) * 1992-04-29 1993-11-03 Kayaba Industry Co., Ltd. Input apparatus
FR2709166A1 (en) * 1993-08-17 1995-02-24 Kubota Kk Hydraulic pilot valve.
EP0716235A3 (en) * 1994-11-10 1996-09-25 Kawasaki Heavy Ind Ltd Hydraulic operated valve

Also Published As

Publication number Publication date
EP0117806B1 (en) 1986-07-30
JPS59164478A (en) 1984-09-17
DE3460368D1 (en) 1986-09-04
US4566492A (en) 1986-01-28
ATE21148T1 (en) 1986-08-15
FR2540959B1 (en) 1986-05-16
FR2540959A1 (en) 1984-08-17

Similar Documents

Publication Publication Date Title
EP0117806B1 (en) Fluid distribution device, particularly for a remote control
FR2690494A1 (en) Oil pressure regulating valve system for hydrostatic transmissions
WO2005015031A1 (en) Remote controller for heavy construction machines with pushrod follower
EP0005101B1 (en) Regulation valve with automatic disconnection
EP0040121A1 (en) Valve rocker disconnector
FR2517791A1 (en) IMPROVEMENTS TO HYDRAULIC DISTRIBUTORS
EP1207966A1 (en) Device for spraying a coating product comprising at least a sprayer and a piston reservoir
FR2487091A1 (en) ELECTRO-HYDRAULIC CONTROL DEVICE
EP0128096A1 (en) Actuator with a pneumatic pressure reservoir, especially for valves
EP0161131A1 (en) Safety device on a braking corrector
FR2468775A1 (en) HYDRAULIC DISTRIBUTOR
EP1420989A1 (en) Brake control device with a check valve for a motor vehicle
EP0833013B1 (en) Hydraulic control device for a lifting cylinder of an arm of an agricultural loader
EP0153253B1 (en) High pressure hydraulic directional valve with mechanical actuated discharge valve
EP0185565B1 (en) Leveling valve for controlling the position of a first element with respect to a second element, and application of such a valve to a pneumatic cushion suspension
FR2687205A1 (en) Hydraulic fluid distributor device for hydraulic remote control
EP0176381A1 (en) High-pressure hydraulic directional control valve with a pilot pressure generator
EP0039643A1 (en) Fluid safety valve
EP0054469B1 (en) Drum brake with braking force adjustment
FR2616117A1 (en) BRAKE PRESSURE MODULATOR FOR SLIDER CONTROL SYSTEM
WO2004067345A1 (en) Servo brake system comprising a decompression piston integrated in the pushrod
FR2665925A1 (en) Electrohydraulic control device for an internal combustion engine valve
FR2562054A1 (en) Method for the automatic sequential use of a pneumatically controlled vent and assembly allowing the use of this method
FR2705423A1 (en) Distributor for fluid, especially pneumatic, of the flat spool and flat plate type
FR3131568A1 (en) Improved dual pilot brake valve

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI NL SE

17P Request for examination filed

Effective date: 19840914

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19860730

REF Corresponds to:

Ref document number: 21148

Country of ref document: AT

Date of ref document: 19860815

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: STUDIO CONS. BREVETTUALE S.R.L.

REF Corresponds to:

Ref document number: 3460368

Country of ref document: DE

Date of ref document: 19860904

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920207

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920212

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920224

Year of fee payment: 9

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19920229

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920305

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19920312

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930228

Ref country code: CH

Effective date: 19930228

Ref country code: BE

Effective date: 19930228

BERE Be: lapsed

Owner name: REXROTH-SIGMA

Effective date: 19930228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930901

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930215

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19931103

EUG Se: european patent has lapsed

Ref document number: 84400311.1

Effective date: 19930912