US3795280A - Three-way lever control for hydraulic control circuit - Google Patents

Three-way lever control for hydraulic control circuit Download PDF

Info

Publication number
US3795280A
US3795280A US00265427A US3795280DA US3795280A US 3795280 A US3795280 A US 3795280A US 00265427 A US00265427 A US 00265427A US 3795280D A US3795280D A US 3795280DA US 3795280 A US3795280 A US 3795280A
Authority
US
United States
Prior art keywords
frame
tractor
valve
control valve
operatively connected
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.)
Expired - Lifetime
Application number
US00265427A
Inventor
R Casey
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Application granted granted Critical
Publication of US3795280A publication Critical patent/US3795280A/en
Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
    • B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
    • B62D11/10—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears
    • B62D11/14—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source
    • B62D11/18—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source the additional power supply being supplied hydraulically
    • B62D11/183—Control systems therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2004—Control mechanisms, e.g. control levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G13/00—Manually-actuated control mechanisms provided with two or more controlling members and also two or more controlled members
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G2009/04703—Mounting of controlling member
    • G05G2009/04714—Mounting of controlling member with orthogonal axes
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G2009/04774—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks with additional switches or sensors on the handle
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G2700/00—Control mechanisms or elements therefor applying a mechanical movement
    • G05G2700/22—Mechanisms linking plurality of controlling or controlled members
    • G05G2700/32—Mechanisms linking plurality of controlling or controlled members with plurality of control members, e.g. preselection and actuating members actuating several controlled members

Definitions

  • the handle and first and second control valves operatively connected to the first andsecond arms, are mounted on a tractor whereas a solenoid actuated third control valve is mounted on the frame of a bulldozer assembly.
  • a pair of lift cylinders, interconnected between the tractor and frame, are operatively connected to the first control valve whereas tilt and angle cylinders, interconnected between the frame and a bulldozer blade, are operatively connected to the third control valve.
  • Hydraulic control circuits for tractor-mounted bulldozer assemblies or the like comprise hydraulically actuated cylinders for performing various lifting, tilting and angling functions. Separate lever controls and associated control valves are normally mounted in the operator station of the tractor to communicate with the cylinders via a plurality of flexible hydraulic lines.
  • An object of this invention is to provide an economical, compact and non-complex three-way lever control adapted to selectively actuate separate control valves and to further provide an integrated fluid circuit for selectively actuating separate cylinder means employed for an implement assembly mounted on a tractor.
  • the three-way lever control' comprises an articulated handle having first, second and third arms pivotally attached together for selectively actuating separate control valves, either individually or simultaneously.
  • the second arm has an electrical switch means mounted thereon in close proximity to the third arm for actuation thereby.
  • Another featureof this invention comprises the application of a fluid circuit means for selectively actuating various cylinder means employed on a tractor and implement assembly combination.
  • manual control means preferably comprising the above three-waylever control
  • a control valve preferably-of the electrically actuated type, is mounted on a frame of the implement assembly and is operatively connected directly to the manual control means.
  • FIG. 1 illustrates a tractor having an implement assembly, such as a bulldozer assembly ll, mounted thereon.
  • the bulldozer assembly comprises a C-frame 12 pivotally mounted on a frame of the tractor by universal ball and socket connections 13 and 14.
  • a work implement, such as a bulldozer blade 15, is operatively connected to the frame by a standard universal ball and socket connection 16.
  • Lift or first cylinder means comprising laterally spaced hydraulic cylinders 17 are operatively interconnected between the tractor and the frame.
  • a tilt or second cylinder means 18 and an angle or third cylinder means 19 are operatively interconnected between the frame and the blade.
  • lift cylinder means 17 are adapted to selectively raise or lower the bulldozer assembly relative to the tractor
  • tilt cylinder means 18 is adapted to selectively tilt blade relative to its normal vertically disposed position
  • angle cylinder means 19 is adapted to angle the blade relative to frame 12.
  • Fluid circuit means for selectively actuating eaehof the above described cylinder means is schematically illustrated in FIG. 2.
  • Such circuit means comprises manual control means having a three-way lever control 20 mounted on a stationary support 21.
  • the lever control comprises an articulated handle having a first arm 22 pivotally mounted on the support for pivotal movement about a first axis A, a second arm 23 is pivotally mounted on the first arm for pivotal movement about a second axis B, disposed transversely relative to the first axis, and a third arm 24 pivtoally mounted on the second arm by a pin 25 for movement about a third axis C, parallel to axis B.
  • the second arm is pivotally connected to a lever 23' which pivots on support 21 about a fourth axis D.
  • the circuit means comprises a positive displacement pump 30 driven by the tractors engine (not shown) to communicate pressurized fluid, preferably hydraulic oil, to valves 27 and 29 via an inlet conduit 31.
  • a return conduit 32 also communicates with the valve to selectively return hydraulic'oil to a tank 33 which is exhausted from the end of each cylinder which is not being pressurized.
  • Selective actuation of three-way valve 27 communicates pressurizedoil to the head or rod ends of cylinders 17 (one shown) via conduit 34 or
  • Selective actuation of three-way valve 29 will communicate pressurized fluid to an electrically actuated third control valve 36 via flexible conduit 37 or 38.
  • Such control valve comprises a solenoid '39 operatively interconnected between an electrical switch means 40 mounted on second arm 23 of the handle and a normally retracted plunger. connected to the valve spool of control valve 36.
  • the switch means is normally open and is adapted to be closed by third arm 24 to move valve 36 to its upward position'by energizing the solenoid by means of a battery4l.
  • Third control valve 36 is operatively connected to the head and rod endof cylinder 18 by flexible conduits 42 and 43, respectively, whereas angle cylinder 19 has its head and rod ends operatively connected to valve 36 by emans of flexible conduits 44 and 45,.respectively.
  • valve 36 is mounted on frame 12 in close proximity to tilt cylinder 18 and angle cylinder 19.
  • Flexible conduits 37 and 38 extend along one arm of frame 12 and constitute the sole hydraulic connection between tractor l and bulldozer assembly 1 1, across one pivot connection 13.
  • a suitable shroud (not shown) may be employed to enclose conduits 37 and 38 to protect same.
  • lift cylinders 17 are selectively extended or retracted by moving lever control 20 in the X direction (FIG. 2) to communicate pressurized oil thereto via valve27 and conduit 34 or 35.
  • the other conduit will exhaust oil from the cylinder in a conventional manner. Movement of the lever control in the Y direction will communicate pressurized oil from valve 29 to valve 36.
  • valve 36 When solenoid 39 is not energized, valve 36 will remain in its illustrated lower, spring biased position to communicate such oil to'extend or retract tilt cylinder 18, through either conduit-42 or 43 depending on the position of valve stem and spool 28. Depression of third handle 24 will close switch 40 to activate solenoid 39 to move the spool of valve 36 upwardly to communicate pressurized oil to either conduit 44 or 45 to selectively retract or extend cylinder 19, again depending on the position of valve stem and spool 28. The circuit is thus conditioned so that valve 36 is shifted only upon the continuous closing of switch 40, due to the normally infrequent need to adjust the angle of the bulldozer blade.
  • a three-way lever control adapted to actuate separate valves comprising a stationary support and v an articulated handle having a first arm, adapted to actuate a first valve, pivotally mounted on said support for'pivotal movementabout a first axis,
  • a second arm adapted to actuate a second valve, pivotally mounted on said first arm for pivotal move ment about a second axis disposed transversely relative to said first axis, and
  • a third arm adapted to actuate a third valve, pivotally mounted on said second arm for pivotal movement about a third axis, I
  • first and second control valves each having a stem reciprocally mounted therein, means pivotally interconnecting each of said first and second arms with a respective one of said valve stems whereby pivotal movement of said handle about said first axis will reciprocate one of said valve stems and pivotal movement of said handle about said second axis will reciprocate the other one of said valve stems,
  • a pressurized fluid source operatively connected to said first and second control valves, fluid actuated first cylinder means operatively connected to one of said first and second control valves for actuation thereby and fluid actuated second and third cylinder means operatively connected to said third control valve for actuation thereby, said third control valve operatively connected'to the other one of said first and second control valves, and
  • a tractor having a bulldozer assembly, including a frame and a bulldozer blade attached thereto, mounted thereon, said first cylinder means opera- 4 tively interconnected between said tractor and said frame for selectively raising or lowering said bulldozer assembly, said second cylinder means operatively interconnected between said frame and said blade for selectively tilting said blade and said third cylinder means operatively interconnected between said frame and said blade for selectively angling said blade.
  • a tractor having an implement assembly mounted thereon, said implement assembly comprising a frame pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cylinder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, a combined fluid and electrical circuit means for selectively actuating each of said cylinder means comprising a pressurized fluid source, single lever manual control means mounted on said tractor, first valve means operatively interconnected between said lift cylinder means and said manual control means for selectively communicating pressurized fluid to said lift cylinder means from said pressurized fluid source, a directional control valve means mounted on said frame and operatively connected directly to each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, second valve means operatively interconnected between said directional control valve means and said manual control means for selectively communicating pressurized fluid to said directional control valve means

Abstract

An articulated handle comprises first, second and third arms pivotally attached together with each arm operatively connected to a respective directional control valve. The handle and first and second control valves, operatively connected to the first and second arms, are mounted on a tractor whereas a solenoid actuated third control valve is mounted on the frame of a bulldozer assembly. A pair of lift cylinders, interconnected between the tractor and frame, are operatively connected to the first control valve whereas tilt and angle cylinders, interconnected between the frame and a bulldozer blade, are operatively connected to the third control valve.

Description

Casey United States Patent 1191 1 1 Mar. 5, 1974 THREE-WAY LEVER CONTROL FOR HYDRAULIC CONTROL CIRCUIT [75] Inventor: Robert- Casey, Washington, 111.
I73] Assignee: Caterpillar Tractor Co., Peoria, 111.
[22} Filed: June 23, 1972 [2]] Appl. No.: 265,427
[52] US. Cl. 172/804, 91/413 [51] Int. Cl E021 3/76 [58] Field of Search 172/804, 803, 801; 91/411 R,
91/413; 74/471, 471 XY; 251/232; 37/D1G. 20
[56] I References Cited H UNITED STATES PATENTS 3,705,631 5/1971 3,589,242 6/1971 3,512,453 5/1970 3,388,609 6/l968 10/1972 Berg 172/804 2,224,725 12/1941) Felt, .lr 172/804 Primary Examiner-Stephen C. Pellegrino Attorney, Agent, or F [rm-Fryer, Tjensvold, Phillips & Lempio [57] ABSTRACT An articulated handle comprises first, second and third arms pivotally attached together with each arm operatively connected to a respective directional control valve. The handle and first and second control valves, operatively connected to the first andsecond arms, are mounted on a tractor whereas a solenoid actuated third control valve is mounted on the frame of a bulldozer assembly. A pair of lift cylinders, interconnected between the tractor and frame, are operatively connected to the first control valve whereas tilt and angle cylinders, interconnected between the frame and a bulldozer blade, are operatively connected to the third control valve.
5 Claims, 2 Drawing Figures v PATENIEI] MR 5 I974 SHEEI 2 BF 2 IMPLEMENT TRACTOR v l THREE-WAY LEVER CONTROL FOR HYDRAULIC CONTROL CIRCUIT I BACKGROUND OF THE INVENTION Hydraulic control circuits for tractor-mounted bulldozer assemblies or the like comprise hydraulically actuated cylinders for performing various lifting, tilting and angling functions. Separate lever controls and associated control valves are normally mounted in the operator station of the tractor to communicate with the cylinders via a plurality of flexible hydraulic lines. Such individual lever controls require an operator that has an inordinately high degree of dexterity and alertness whereas the hydraulic lines are subject to high rates of failure since they are all normally positioned to extend between the tractor and bulldozer assembly. A partial solution to such problem is .found in U.S. Pat. No. 3,5 l 2,45 3, assigned to the assignee of this application, which discloses a system for the actuation of hydraulic cylinders wherein a pilot pressure system is disposed entirely upon any implement. Y i
SUMMARY OF THE INVENTION An object of this invention is to provide an economical, compact and non-complex three-way lever control adapted to selectively actuate separate control valves and to further provide an integrated fluid circuit for selectively actuating separate cylinder means employed for an implement assembly mounted on a tractor.
The three-way lever control'comprises an articulated handle having first, second and third arms pivotally attached together for selectively actuating separate control valves, either individually or simultaneously. In the preferred embodiment of this invention, the second arm has an electrical switch means mounted thereon in close proximity to the third arm for actuation thereby.
Another featureof this invention comprises the application of a fluid circuit means for selectively actuating various cylinder means employed on a tractor and implement assembly combination. In such combination, manual control means, preferably comprising the above three-waylever control, are mounted on the tractor. A control valve, preferably-of the electrically actuated type, is mounted on a frame of the implement assembly and is operatively connected directly to the manual control means. I
BRIEF DESCRIPTION or TI-IEQDRAWINGS DETAILED DESCRIPTION FIG. 1 illustrates a tractor having an implement assembly, such as a bulldozer assembly ll, mounted thereon. The bulldozer assembly comprises a C-frame 12 pivotally mounted on a frame of the tractor by universal ball and socket connections 13 and 14. A work implement, such as a bulldozer blade 15, is operatively connected to the frame by a standard universal ball and socket connection 16.
Lift or first cylinder means, comprising laterally spaced hydraulic cylinders 17 are operatively interconnected between the tractor and the frame. A tilt or second cylinder means 18 and an angle or third cylinder means 19 are operatively interconnected between the frame and the blade. Thus it can be seen that lift cylinder means 17 are adapted to selectively raise or lower the bulldozer assembly relative to the tractor, tilt cylinder means 18 is adapted to selectively tilt blade relative to its normal vertically disposed position, and angle cylinder means 19 is adapted to angle the blade relative to frame 12.
Fluid circuit means for selectively actuating eaehof the above described cylinder means is schematically illustrated in FIG. 2. Such circuit means comprises manual control means having a three-way lever control 20 mounted on a stationary support 21. The lever control comprises an articulated handle having a first arm 22 pivotally mounted on the support for pivotal movement about a first axis A, a second arm 23 is pivotally mounted on the first arm for pivotal movement about a second axis B, disposed transversely relative to the first axis, and a third arm 24 pivtoally mounted on the second arm by a pin 25 for movement about a third axis C, parallel to axis B.
A stem 26, forming an extension of a spool of a first three-way control valve 27, is pivotally connected to first arm 22 to reciprocate in response to pivoting of the first arm about axis A. A second stem 28, forming an extension of aspool of a second three-way control valve 29 is pivotally connected to second arm 23 to reciprocate in response to pivotal movements of the second arm about axis B. The second arm is pivotally connected to a lever 23' which pivots on support 21 about a fourth axis D. Such control arm is more fully described in U.S. Patent Application Ser. No. 261,606 filed on June 12, 1972 by Robert Casey for Single Lever Control for Multi-Valve-Operation. I
The circuit means comprises a positive displacement pump 30 driven by the tractors engine (not shown) to communicate pressurized fluid, preferably hydraulic oil, to valves 27 and 29 via an inlet conduit 31. A return conduit 32 also communicates with the valve to selectively return hydraulic'oil to a tank 33 which is exhausted from the end of each cylinder which is not being pressurized. Selective actuation of three-way valve 27 communicates pressurizedoil to the head or rod ends of cylinders 17 (one shown) via conduit 34 or Selective actuation of three-way valve 29 will communicate pressurized fluid to an electrically actuated third control valve 36 via flexible conduit 37 or 38.
Such control valve comprises a solenoid '39 operatively interconnected between an electrical switch means 40 mounted on second arm 23 of the handle and a normally retracted plunger. connected to the valve spool of control valve 36. The switch means is normally open and is adapted to be closed by third arm 24 to move valve 36 to its upward position'by energizing the solenoid by means of a battery4l. Third control valve 36 is operatively connected to the head and rod endof cylinder 18 by flexible conduits 42 and 43, respectively, whereas angle cylinder 19 has its head and rod ends operatively connected to valve 36 by emans of flexible conduits 44 and 45,.respectively.
Referring again to FIG. 1, it should be noted that valve 36 is mounted on frame 12 in close proximity to tilt cylinder 18 and angle cylinder 19. Flexible conduits 37 and 38 extend along one arm of frame 12 and constitute the sole hydraulic connection between tractor l and bulldozer assembly 1 1, across one pivot connection 13. lf so desired, a suitable shroud (not shown) may be employed to enclose conduits 37 and 38 to protect same. l
in operation, lift cylinders 17 are selectively extended or retracted by moving lever control 20 in the X direction (FIG. 2) to communicate pressurized oil thereto via valve27 and conduit 34 or 35. The other conduit will exhaust oil from the cylinder in a conventional manner. Movement of the lever control in the Y direction will communicate pressurized oil from valve 29 to valve 36.
When solenoid 39 is not energized, valve 36 will remain in its illustrated lower, spring biased position to communicate such oil to'extend or retract tilt cylinder 18, through either conduit-42 or 43 depending on the position of valve stem and spool 28. Depression of third handle 24 will close switch 40 to activate solenoid 39 to move the spool of valve 36 upwardly to communicate pressurized oil to either conduit 44 or 45 to selectively retract or extend cylinder 19, again depending on the position of valve stem and spool 28. The circuit is thus conditioned so that valve 36 is shifted only upon the continuous closing of switch 40, due to the normally infrequent need to adjust the angle of the bulldozer blade.
What is claimed is: I I
l. A three-way lever control adapted to actuate separate valves comprising a stationary support and v an articulated handle having a first arm, adapted to actuate a first valve, pivotally mounted on said support for'pivotal movementabout a first axis,
a second arm, adapted to actuate a second valve, pivotally mounted on said first arm for pivotal move ment about a second axis disposed transversely relative to said first axis, and
a third arm, adapted to actuate a third valve, pivotally mounted on said second arm for pivotal movement about a third axis, I
first and second control valves each having a stem reciprocally mounted therein, means pivotally interconnecting each of said first and second arms with a respective one of said valve stems whereby pivotal movement of said handle about said first axis will reciprocate one of said valve stems and pivotal movement of said handle about said second axis will reciprocate the other one of said valve stems,
electrical switch means mounted on said second arm, closely adjacent to said third arm for actuation thereby, and an electrically actuated third control valve operatively connected to said switch means,
a pressurized fluid source operatively connected to said first and second control valves, fluid actuated first cylinder means operatively connected to one of said first and second control valves for actuation thereby and fluid actuated second and third cylinder means operatively connected to said third control valve for actuation thereby, said third control valve operatively connected'to the other one of said first and second control valves, and
a tractor having a bulldozer assembly, including a frame and a bulldozer blade attached thereto, mounted thereon, said first cylinder means opera- 4 tively interconnected between said tractor and said frame for selectively raising or lowering said bulldozer assembly, said second cylinder means operatively interconnected between said frame and said blade for selectively tilting said blade and said third cylinder means operatively interconnected between said frame and said blade for selectively angling said blade.
2. The invention of claim 1 wherein said third axis is at least generally parallel to said second axis.
3. The invention of claim 1 wherein said three-way lever control and said first and second control valves are mounted on said tractor and said third control valve is mounted on said frame.
4. A tractor having an implement assembly mounted thereon, said implement assembly comprising a frame pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cylinder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, a combined fluid and electrical circuit means for selectively actuating each of said cylinder means comprising a pressurized fluid source, single lever manual control means mounted on said tractor, first valve means operatively interconnected between said lift cylinder means and said manual control means for selectively communicating pressurized fluid to said lift cylinder means from said pressurized fluid source, a directional control valve means mounted on said frame and operatively connected directly to each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, second valve means operatively interconnected between said directional control valve means and said manual control means for selectively communicating pressurized fluid to said directional control valve means from said pressurized fluid source, and electrical pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cylinder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, fluid circuit means for sleec'tively actuating each of said cylinder means comprising a pressurized fluid source, a three-way single lever control means mounted on said tractor comprising first, second and third arms pivotally mounted together and actuating means operatively connecting said first, second and third arms to first, second and third control valves, respectively, to selectively actuate same, said first and second control valves mounted on said tractor and said third control valve mounted on said frame, said third control valve comprising a directional control valve means operatively interconnected between said second valve and each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, and electrical actuating means operatively connected between said manual control means and said directional control valve means for selectively actuating said directional control valve means.

Claims (5)

1. A three-way lever control adapted to actuate separate valves comprising a stationary support and an articulated handle having a first arm, adapted to actuate a first valve, pivotally mounted on said support for pivotal movement about a first axis, a second arm, adapted to actuate a second valve, pivotally mounted on said first arm for pivotal movement about a second axis disposed transversely relative to said first axis, and a third arm, adapted to actuate a third valve, pivotally mounted on said second arm for pivotal movement about a third axis, first and second control valves each having a stem reciprocally mounted therein, means pivotally interconnecting each of said first and second arms with a respective one of said valve stems whereby pivotal movement of said handle about said first axis will reciprocate one of said valve stems and pivotal movement of said handle about said second axis will reciprocate the other one of said valve stems, electrical switch means mounted on said second arm, closely adjacent to said third arm for actuation thereby, and an electrically actuated third control valve operatively connected to said switch means, a pressurized fluid source operatively connected to said first and second control valves, fluid actuated first cylinder means operatively connected to one of said first and second control valves for actuation thereby and fluid actuated second and third cylinder means operatively connected to said third control valve for actuation thereby, said third control valve operatively connected to the other one of said first and second control valves, and a tractor having a bulldozer assembly, including a frame and a bulldozer blade attached thereto, mounted thereon, said first cylinder means operatively interconnected between said tractor and said frame for selectively raising or lowering said bulldozer assembly, said second cylinder means operatively interconnected between said frame and said blade for selectively tilting said blade and said third cylinder means operatively interconnected between said frame and said blade for selectively angling said blade.
2. The invention of claim 1 wherein said third axis is at least generally parallel to said second axis.
3. The invention of claim 1 wherein said three-way lever control and said first and second control valves are mounted on said tractor and said third control valve is mounted on said frame.
4. A tractor having an implement assembly mounted thereon, said implement assembly comprising a frame pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cyliNder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, a combined fluid and electrical circuit means for selectively actuating each of said cylinder means comprising a pressurized fluid source, single lever manual control means mounted on said tractor, first valve means operatively interconnected between said lift cylinder means and said manual control means for selectively communicating pressurized fluid to said lift cylinder means from said pressurized fluid source, a directional control valve means mounted on said frame and operatively connected directly to each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, second valve means operatively interconnected between said directional control valve means and said manual control means for selectively communicating pressurized fluid to said directional control valve means from said pressurized fluid source, and electrical actuating means operatively connected between said manual control means and said directional control valve means for selectively actuating said directional control valve means.
5. A tractor having an implement assembly mounted thereon, said implement assembly comprising a frame pivotally mounted on said tractor, a work implement operatively connected to a forward end of said frame, lift cylinder means operatively interconnected between said tractor and said frame, tilt cylinder means operatively interconnected between said frame and said work implement, and angle cylinder means operatively interconnected between said frame and said work implement, fluid circuit means for sleectively actuating each of said cylinder means comprising a pressurized fluid source, a three-way single lever control means mounted on said tractor comprising first, second and third arms pivotally mounted together and actuating means operatively connecting said first, second and third arms to first, second and third control valves, respectively, to selectively actuate same, said first and second control valves mounted on said tractor and said third control valve mounted on said frame, said third control valve comprising a directional control valve means operatively interconnected between said second valve and each of said tilt and angle cylinder means for selectively communicating pressurized fluid thereto from said pressurized fluid source, and electrical actuating means operatively connected between said manual control means and said directional control valve means for selectively actuating said directional control valve means.
US00265427A 1972-06-23 1972-06-23 Three-way lever control for hydraulic control circuit Expired - Lifetime US3795280A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26542772A 1972-06-23 1972-06-23

Publications (1)

Publication Number Publication Date
US3795280A true US3795280A (en) 1974-03-05

Family

ID=23010415

Family Applications (1)

Application Number Title Priority Date Filing Date
US00265427A Expired - Lifetime US3795280A (en) 1972-06-23 1972-06-23 Three-way lever control for hydraulic control circuit

Country Status (6)

Country Link
US (1) US3795280A (en)
JP (1) JPS5530147B2 (en)
BE (1) BE801051A (en)
CA (1) CA987572A (en)
FR (1) FR2189794B1 (en)
IT (1) IT986202B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913684A (en) * 1974-12-13 1975-10-21 Caterpillar Tractor Co Implement mounting arrangement having lifting and angling capability
US3997007A (en) * 1975-07-14 1976-12-14 Caterpillar Tractor Co. Implement positioning hydraulic control system
US4054083A (en) * 1975-07-14 1977-10-18 Caterpillar Tractor Co. Dual lever control mechanism
US4083414A (en) * 1975-12-30 1978-04-11 Kabushiki Kaisha Komatsu Seisakusho Combination angling-tilting bulldozer
US4281721A (en) * 1978-12-12 1981-08-04 Beales Steel Products Ltd. Bulldozer blade mounting assembly
US4523886A (en) * 1982-01-13 1985-06-18 Towmotor Corporation Container handler with programmed electro-hydraulic control circuit
US5277258A (en) * 1992-05-27 1994-01-11 Dell Jered O Single lever bulldozer blade control apparatus
US5899280A (en) * 1998-02-12 1999-05-04 Chouteau; Dan L. Tilting front end loader
US6105682A (en) * 1998-12-02 2000-08-22 Caterpillar Inc. Apparatus for controlling an earthworking implement having four degrees of freedom
EP0950634A3 (en) * 1998-04-15 2002-10-16 Still Gmbh Multifunction lever
US20110067892A1 (en) * 2008-08-04 2011-03-24 Kubota Corporation Dozer Apparatus
US20160040395A1 (en) * 2014-08-05 2016-02-11 Deere & Company Front attachment control system
DE102015110625A1 (en) 2015-07-01 2017-01-05 Tobias Burdik Device for storing and guiding an actuating device for a control valve
EP3506045A1 (en) * 2017-12-28 2019-07-03 Honda Motor Co., Ltd. Handlebar and working machine
US11299866B2 (en) * 2019-09-24 2022-04-12 Deere & Company Dozer blade attachment control system and apparatus for a compact track loader
US11346074B2 (en) * 2017-10-31 2022-05-31 Babl Industries, LLC Skid-steer loader implement
US11952739B2 (en) 2023-05-19 2024-04-09 Babl Industries, LLC Skid-steer loader implement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211522A (en) * 1984-04-05 1985-10-23 Kubota Ltd Operating structure of working truck
JPH0352270Y2 (en) * 1984-11-02 1991-11-12
KR102375989B1 (en) 2017-08-10 2022-03-18 삼성전자주식회사 Image sensor for compensating signal difference between pixels

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224725A (en) * 1939-01-19 1940-12-10 Jr George H Felt Bulldozer blade tilting device
US3388609A (en) * 1967-03-22 1968-06-18 Deere & Co Single lever control mechanism
US3512453A (en) * 1968-05-22 1970-05-19 Caterpillar Tractor Co System for actuation of hydraulic motors on tractor powered implements
US3589242A (en) * 1969-08-18 1971-06-29 Caterpillar Tractor Co Single lever control for hoeing scraper components
US3700044A (en) * 1970-09-21 1972-10-24 Allis Chalmers Mfg Co Hydraulic system for controlling bulldozer blade
US3705631A (en) * 1971-05-27 1972-12-12 Case Co J I Hydraulic tilt and pitch control for dozer blade

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224725A (en) * 1939-01-19 1940-12-10 Jr George H Felt Bulldozer blade tilting device
US3388609A (en) * 1967-03-22 1968-06-18 Deere & Co Single lever control mechanism
US3512453A (en) * 1968-05-22 1970-05-19 Caterpillar Tractor Co System for actuation of hydraulic motors on tractor powered implements
US3589242A (en) * 1969-08-18 1971-06-29 Caterpillar Tractor Co Single lever control for hoeing scraper components
US3700044A (en) * 1970-09-21 1972-10-24 Allis Chalmers Mfg Co Hydraulic system for controlling bulldozer blade
US3705631A (en) * 1971-05-27 1972-12-12 Case Co J I Hydraulic tilt and pitch control for dozer blade

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913684A (en) * 1974-12-13 1975-10-21 Caterpillar Tractor Co Implement mounting arrangement having lifting and angling capability
US3997007A (en) * 1975-07-14 1976-12-14 Caterpillar Tractor Co. Implement positioning hydraulic control system
US4054083A (en) * 1975-07-14 1977-10-18 Caterpillar Tractor Co. Dual lever control mechanism
US4083414A (en) * 1975-12-30 1978-04-11 Kabushiki Kaisha Komatsu Seisakusho Combination angling-tilting bulldozer
US4281721A (en) * 1978-12-12 1981-08-04 Beales Steel Products Ltd. Bulldozer blade mounting assembly
US4523886A (en) * 1982-01-13 1985-06-18 Towmotor Corporation Container handler with programmed electro-hydraulic control circuit
US5277258A (en) * 1992-05-27 1994-01-11 Dell Jered O Single lever bulldozer blade control apparatus
US5899280A (en) * 1998-02-12 1999-05-04 Chouteau; Dan L. Tilting front end loader
EP0950634A3 (en) * 1998-04-15 2002-10-16 Still Gmbh Multifunction lever
US6105682A (en) * 1998-12-02 2000-08-22 Caterpillar Inc. Apparatus for controlling an earthworking implement having four degrees of freedom
US20110067892A1 (en) * 2008-08-04 2011-03-24 Kubota Corporation Dozer Apparatus
US8678103B2 (en) * 2008-08-04 2014-03-25 Kubota Corporation Dozer apparatus
US20160040395A1 (en) * 2014-08-05 2016-02-11 Deere & Company Front attachment control system
US9629299B2 (en) * 2014-08-05 2017-04-25 Deere & Company Front attachment control system
DE102015110625A1 (en) 2015-07-01 2017-01-05 Tobias Burdik Device for storing and guiding an actuating device for a control valve
EP3115861A2 (en) 2015-07-01 2017-01-11 Tobias Burdik Device for storing and guiding an actuation device for a control valve
US11346074B2 (en) * 2017-10-31 2022-05-31 Babl Industries, LLC Skid-steer loader implement
US11686064B2 (en) 2017-10-31 2023-06-27 Babl Industries, LLC Skid-steer loader implement
EP3506045A1 (en) * 2017-12-28 2019-07-03 Honda Motor Co., Ltd. Handlebar and working machine
US11299866B2 (en) * 2019-09-24 2022-04-12 Deere & Company Dozer blade attachment control system and apparatus for a compact track loader
US11952739B2 (en) 2023-05-19 2024-04-09 Babl Industries, LLC Skid-steer loader implement

Also Published As

Publication number Publication date
FR2189794A1 (en) 1974-01-25
JPS5530147B2 (en) 1980-08-08
CA987572A (en) 1976-04-20
IT986202B (en) 1975-01-20
BE801051A (en) 1973-12-18
JPS4957413A (en) 1974-06-04
FR2189794B1 (en) 1977-02-18

Similar Documents

Publication Publication Date Title
US3795280A (en) Three-way lever control for hydraulic control circuit
US3854380A (en) Three-way lever control for hydraulic control circuit
US3897805A (en) Three-way lever control for actuating a plurality of valves
US7036248B2 (en) Pattern select valve for control levers of a title work vehicle
US3273729A (en) Clamping device
US3631930A (en) Mounting arrangement for bulldozer blades
US3862697A (en) Front loading hydraulic excavator
US6273198B1 (en) Pitch control system
US5413452A (en) Hydraulic system for a backhoe apparatus
US4024796A (en) Float control electrical circuit for a blade
EP0053158A1 (en) Self-leveling and height control hydraulic system.
US2903145A (en) Valve control
US3788401A (en) Hydraulic circuit with valve to provide semi-float control of a dozer blade
US3986563A (en) Suspension and control linkage for a grade blade support frame
CA1274605A (en) Control circuit for positioning an earthmoving blade
US2575507A (en) Hydraulic power device
US3978998A (en) Fast hoist control system
US6877773B1 (en) Pilot hydraulic control for a pair of stabilizer legs on a backhoe loader machine
US3677350A (en) Hydraulic motor grader blade lift, centershift control
US4066004A (en) Oscillatory electro-hydraulic system
US3515224A (en) Hydraulic cylinder control for bulldozer
US4500250A (en) Backhoe swing mechanism
US3904051A (en) Safety device for preventing undesired movement of three-point hitch-mounted backhoe frame
US3997007A (en) Implement positioning hydraulic control system
US4024974A (en) Detent release means for loader bucket positioners

Legal Events

Date Code Title Description
AS Assignment

Owner name: CATERPILLAR INC., A CORP. OF DE.,ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515

Owner name: CATERPILLAR INC., 100 N.E. ADAMS STREET, PEORIA, I

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515