US2544857A - Pressure feed fountain brush - Google Patents

Description

March 13, 1951 F, PERWAS 2,544,857

PRESSURE FEED FOUNTAIN BRUSH Filed July 28, 1945 l 4 shee's-sheet 1 .9 f I INVENTOR.

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jme/flaw@ Patented Mar. 13, 1951 UNITED STATES PATENT OFFICE PRESSURE FEED FOUNTAIN BRUSH Ludwig F. Perwas, New York, N. Y.

Application July 28", 1945, Serial No. 607,621

(Cl. 15-133)l 8i Claims..

My present invention', inl its broad aspect', has to do with improvements in fountain tooth brushes, wherein the dentifrice isi contained i'n a reservoir in the handleV and' pressure means are provided both for re-lling the reservoir and' discharging its contents to the bristles of' the brush head for use. More particularly, it is my purpose to provide improved means forr (1) attaching the brush head to the handle, (2)', for regulating intake and discharge of dentifrice through the brush head, and preventing leakage of dentifrice through the brush head when the device is not in use, (35 for increasing andv decreasing air pressure in the dentifrice receptacle for discharging dentifrice from the receptacle, and reiling the receptacle, such means including a pis'- ton device in an air pressure compartment and plurality of cooperating valves for regulating the operaton of the device and controlling the ow of air, and (ll), improving' theV means for retaining the brush head cap in place.

Other and eouall'y important objects and ad"- vantages o-f my invention will be apparent from the following description and drawings, and it is pointed out that changes in form, size, shape, materials and construct-'on and arrangement of parts is within the purview of my broad inventive concept and the scope of the appended claims,

In the drawings wherein I have shown preferred forms of my invention:

Figure 1 is a longitudinal section partly fragmentary, and taken through its greatest Width;

Figure 2 is a longitudinal section partly fragmentary, with the device turned 90 from Figure l, and through its lesser width;

Figure 3 is a detail side view showing the nut for attaching the brush head and showing the attaching means for the cap;

Figure 4 is a section on. the line 4--4 of. Figure 1;

Fgure 5 is a section on the line 5--5 of Figure 1; n

Figure 6 is a section on the line 6 6 of Figure 1;

Figure 7 is a section on the line 'l-T of Figure 1,. showing the neutral position with valves shut off;

Figure 8 is a section on the line 8 8 of Figure 1, showing the neutral position with the valves shut ofi;

Figure 9 is a sectional detail of the piston and valves in position to' pump air into the dentifrice receptacle;

Figure 10 is a section on the line ytil-lo of Fig..-

2 ure 9,y with the piston cylinder turned to pump an: 1n;

Figure 11i isa fragmentary top plan View of the air pressure chamber with the ports set to pump air into the dentifrice receptacle;

Figure' 12 is a section throughV the air pressure compartment showing the piston and valvesl in position to pump air into' the dentifrice receptacle for discharge;

Figure 13 is a section through the air pressure compartment showing the piston andi valves in position'to' pump air out of the dentifrice receptacle and into the air pressure chamber tov refill the dentifrice receptacle;

Figure 14 is a transverse section showingv the piston cylinder turned andv the valves set tol pump air out of the air pressure chamber;

Figure 15 is a fragmentary top plan View of the air pressure chamber showing the ports set to pump air out;

Figure 16 is a View of the. valve seat of the valve for pumping air out of the air pressure chamber;

Figure 17 is a View of the valve seat of the valve for pumping air into the air pressure chamber;

Figure 18 is a fragmentary longitudinal section showing a modified form ofv piston and air valve structure;

Figure 19 is a'section on the line I`9l-I'9- of Figure 18; y

Figure 20 is a section on the line 2li-20 of Figure 18;

Figure 21 is a top plan view of the piston operating nut showing the spring pressed' valves Figure 22 is a detail of one of the attaching plates for the piston cylinder;

Figure 23 is a fragmentary view of they knurled surfaces showing that all edges and crevices are rounded to prevent injury to the mouth upon contact therewith.

Figure 24 is a sectional View on thev line 24-24 of Figure 25 showing another modified form of the invention;

Figure 25 is a sectional View on the line 25-25 of Figure 24';

Figure 26 is a sectional View on the line 26-26 of Figure 25;

Figure 27 is an enlarged detail View of the packing gland;

Figure 28 is a bottom View of the piston and control therefor;

Figure 29 is an enlarged view of the piston control in operative position;

Figure 30 is a fragmentary front View of a modified valve strcture,` and Figure 31 is a fragmentary side view of the same.

In the drawings, wherein like characters of reference are used to designate like or similar parts throughout the several views:

The numeral I designates a hollow, elliptical body, which functions on the handle of my device, and which may be formed of plastic, and to which is attached by a plastic weld 2 a conical head 3. The head 3 is annular-ly flanged as at 4 at its base, and a centrally located boss 5 is provided on the base of the head which is formed with a bore 6 to receive the spring 1 and head 8 of a valve 9, having a star shaped stem I6. The inner end of the wall of the boss is provided with opposed radial passages II that lead laterally through the boss to communicate with the passage I2. The passage I2 is formed with a square enlargement as at I4 to receive the square straight part of the shank I5 of the brush head-see Figure 5-which is formed with a bore I6 and a reduced tip I1 fitting in the passage I2 and beveled to provide a valve seat I8 for the valve 9 which normally engages the seat I8 under pressure of spring 1 to close the bore I6. Packing i9 is provided. The passage I2 is again enlarged as at 28 and threaded to receive a knurled nut 2l which has a conical depression 22 in its base to receive the split clamping member 23-see Figures 1 and 4, which has flanged parts 24 engaging in a l,

groove 25 in the brush head shank I5. The member 23 engages a washer 26 which presses on the packing 21. The brush head shank is curved at 28 and leads into the head 29, has Ibristle tufts 30, and the bore I6 is continued into the head and communicates with a series of ports 3l in the head between the tufts. A cap 32 having a plurality of openings 33 is designed to cover and protect the brush, and ts down over the head 3.

To detachably hold the cap 32 on the head 3, I provide on the head latch means including a pair of countersunk opposed Iplates 33a held in place by screws 34. Each plate has a beveled opening to receive a conical ball headed latch 35. Each latch is pressed by a spring 36 in a cavity 31 in the head 3 back of each plate. The latches 25 engage in depressions 38 in the cap to removably hold the cap in place.

The opposite end of the body I is formed with an inwardly extending hollow casing 39 having side walls 40 and an inner end wall 4I and connected with the body by a web 42. The web 42 has an end channel to receive a cap 43 which is removably held in place by conical ball headed latches 44 pressed by springs 45 and retained by threaded countersunk nuts 46 having conical openings 41 to seat the latches so that they detachably engage in depressions in thecap to removably hold the cap in place. The web 42 is formed with arcuate opposed recesses 48 to receive the opposed ears 49 of a cylinder 5i), mounted in the casing 39 for limited rotational movement. Substantially arcuate plates 5I are attached to the web by screws 52 over the recesses 48 and ears 4S to hold the cylinder in place, and springs 53 are provided in the ears and bearing against the plates to give a proper t, forces the gasket 65 secured to the head of the cylinder 59 against the inner wall 4I. The outer end of the cylinder has a removable head 54 retained in position by a nut 54 which is formed with wrench openings 55, and a central threaded opening 56 to each side of which are opposed smaller openings 51.

Mounted on the cylinder 5D is a piston 58 provided with a sectional rod formed with an exteriorly threaded part 59 and an interiorly threaded part 66 received thereon so that the rod may be extended or reduced in length. A knurled nut 6I is provided on part 66 which has a threaded reduced boss 62 engaging in the opening 56 in the head 54 so that by engaging the nut with the head the piston is held in its innermost position as shown in Figure 1, but by detaching the nut, the piston may be pulled out as shown in Figure 9.

As shown in Figures 12 and 13, the end 4I of the casing 39 is provided with a pair of spring seated ball valves 63 and 64. These valves are opposed, valve 63 being an intake valve for air into the interior of the body I, and valve 54 being an outlet valve for air from the body I. A gasket 65 is mounted on the head or the cylinder 50 beneath the valves. The rotatable cylinder 56 and gasket 65 have ports 66 and 61 adapted to selectively register with valves 64 and 63 and to lie between the valves-as in the neutral position of Figures '1 and S-to close both valves. The cylinder 50 is rotated in one direction to open valve 63-as shown in Figures 13, 14 and 15-to release air from the body I, and in the opposite direction to open valve 64 to allow air to enter the body Ip--as shown in Figures 10, 11 and 12. The cylinder is rotated by grasping the protruding end 68 with the ngers.

The piston 58 has two ball valves 69 and 16, which are opposed. Valve 69 complements valve 64 and permits air to pass through the piston head toward the piston rod, and valve 10 complements valve 63 and permits air to pass through the piston from the side having the rod to the opposite side. Closure stems 'H and 12 are provided-one for valve 69 and the other for valve v1li. The stem 1I for valve 69-see Figure l-has a slot 13 and iiange 14, and the stem 12 for valve 'l0- see Figure 16-has a cup-shaped, or outwardly flared recess 15 and a ange 16. Each stem is threaded at 11 to engage in threaded openings in the piston 58 and is knurled as at 18. The valve 16 has double ports 19 and valve 69 one port 19a.

While it is believed that the operation and advantages of my invention are apparent from the foregoing, it is pointed out that the receptacle or chamber 86 in the body I holds the dentifrice (not shown) which is'dispensed to the brush bristles through the bore I6. The cylinder has an air pressure compartment 8l above the piston, To ll my chamber with dentifrice, the nut 6I unscrewed and pulled out as in Figures 9, 12 and 13, the cylinder 59 first having been turned from the neutral position shown in Figures 7 and 8, to the position shown in Figures 10 and 13 so that valve 64 is open through port 66. The piston is now drawn out and the air in chamber 80 withdrawn to chamber 8l and the dentifrice sucked up into chamber 80 through bore I6 and channels II, the valve 9 having been unseated by pressure on head 8 and against spring 1. The piston 58 is now returned to its passive position as shown in Figure 1, stem 12 having been turned to open valve 14 and the cylinder having been returned to the neutral position of Figures 7 and 8. To dispense the dentifrice, air pressure is built up in chamber 80 by turning the cylinder, and stems 1I and 12 to expel air from chamber 8I into chamber 86 and the valves are placed in the positions shown in Figures 9, l2 and 14, the piston having first been retracted by opening valve 16 by turning stem 12 and leaving the cylinder in neutral position. As

much Vor as little dentifrice maybe expelled as desired, .and after use, the piston is `each time returned to normal.

In Figures 18, 19, k20 and 2l., a modied form is shown in which the piston 58 has a single :air channel 82 leading through the `sections 59a and 60a of the rod, and a ball valve 83 mounted on a plate :spring 84 is provided to open and close vthe channel 82. The outer end of the channel has a seat 85 and the spring is bent up as at `86 to .form a finger-nail grip to swing the valve spring on the attaching screw 81. Opposed air slot 88 and key way 88' are provided on each side of the rod section 59. The operation and construction of the Iform of my device is simplied through elimination of valves 69 and 10, stems 1| and 12. Otherwise, the pumping operation is the same as previously `indicated with the principal embodiment. The key way 88 locking the piston and sleeve in `order that the stem may be rextended and the head 54 is retained in position by a snap ring 54a.

In Figures 24, 25, 26, 2'1, 28 and 29 a modied form is shown in which the pump unit housing 89 is attached to the hollow-elliptical body I by a plastic weld or similar means. To facilitate assemblying the body I and housing `89, the housing is provided with a slotted upstanding circular ring portion 90 ,formed on the end wall 92 of the housing 89 which being of avsmaller diameter than the body is adapted to be inserted in the open end thereof and the vedge thereof contacts a shoulder 9| on the housing 89. It is at this point of assembly that the plastic weld is made resulting in an integral unitary structure.

The end wall 92 of the casing 89 is provided with a circular recess 93 having extremely from opposite edges thereof arcuate recesses ,94 of the circular control unit 96 which is received in the recess 93 for limited rotational movement therein.

The control unit 96 is provided with an air passage 91 for the inward now of air and a passage 98 for an outward flow of air and these passages are aligned in operative positions with the valves 64 and 63 respectively by the ears 95 and the control unit 96 has a circular rubber, cork vor other resilient material gasket 99 cemented thereto to form an air tight t between the unit 96 and the end Wall 92 of the housing 89.

The control unit 96 is provided with a depending rod having a pivoted handle |0| on the free end thereof and the air passages are moved Ainto and out of alignment by rotation of the rod |00 by means of the handle |0I.

Mounted for reciprocal movement within the housing 89 and on the rod |00 is a piston |02. The piston is provided with an annular peripheral recess |03 for the reception of packing |04 to make an air-tight fitting therebetween.

At the medial point of the piston |02, there is provided a circular internally threaded recess |05 and a smaller smooth walled recess |06 having an opening |01 therein to conform to the rod |00. A packing ring I8 having contact on the inner side thereof with the rod |00 is positioned in the recess |06 and is retained in position by a gland nut I 09 which is threadedly received in the recess |05. The upper surface of the nut |09 is provided with a circular recess I I0 to receive one end of a compression spring I I I, the other end of which is received in a circular recess |I2 in the under surface of the control unit 96.r This cornpression spring I II forces the unit 96 into an airy '6 tight contact 'within the recess 9,3 Iof the end wall 92.

The piston |02 lis .provided with a depending circular Yportion I I3 ait the medial point of its under surface and the portion ||3 is provided with an internally threaded bore I|4 to receive the complementary threaded piston rod ||5 having a bore I |6 for reception of the rod |00.

The piston |02 has two lball valves 69 and 10 which are opposed. Valve 69 complements valve 64 and opening 9'! in the control 96 and permits air to pass therethrough when :in operative position, and valve complements valve 63 and opening 98 in the control 96 and permits air to pass therethrough when in operative position. `Closure stems 1I and 12 are provided one for valve 169 Vand the vother for valve 10. The stems 1I and 1'2. being constructed as shown in Figures I6 and I 1 respectively and the valve 10 has double ports 19' and valve 69 one port 19a.

The lower end of the housing 89 is provided with a guide and anchorage plate ||1 which is retained in position by means of split wire retaining rings I'IS. The plate I I'I is provided with vertical yopenings I I9 to slidably receive the stems and 12, and an `opening |20 having a plurality oi"a'i1'slots I2I inwardlyv thereof which are yadapted to slidably receive the portion I3 of the piston The rod H5 has an externally threaded reduced boss |22 engaging in the recess |23 which is formed in the depending internally threaded Acircular portion |24 of the plate |I1. A knurled knob |25 of larger circumference than the boss |22 is provided on the end of the rod I I5 so. that by manipulating the knob |25 the piston |02 is held in its innermost position or the piston may be pulled o-u-t as previouslyv described.

The housing 89v is provided with a cover |26 having the cavity |21 formed therein and an upwardly extending reduced portion .|28 on the periphery of the cavity |21 which is adapted for insertion into the housing 89.

The cover |26 is pivotally hinged to the casing 89 by a hinge pivot pin |21 which is positioned in plate I|1 in the opening |28, the upper edge of which is recessed at V| 29 to receive the head I 30 `of the pin |26. The lower end of the pin |21 is threaded for reception in the threaded bore |3| of the cover |26, a spring |32 positioned on the vpin |21 contacts the under surface of the plate H1 and the upper edge of the cover |26 and thus forces the cover |26 downwardly into position to vpermit it being pivoted past 'the lower edge of the 'housing 89 for the manipulation of the piston rod I5. A spring clip |33 secured to a circular boss |34 in the cover |26 by screws |35 grasps the knob chamber and a piston chamber controlled by .operation of the unit 96 to permit air to enter or .leave as the piston |02 is reciprocated.

The operation of the modified form is the same as previously described for the forms shown in Figures 1 to 22 inclusive.

In Figures 30 and 31,. the head 3, flange 4, boss 5 having the cavity 6 are the same as shown in Figure 1, but in this instance, the boss 5 is provided With an opening |36 in the bottom thereof which permits the dentifrice |31 to enter and act on the tapered cylindrical oat valve |38, The

`7 end of the valve l38 will therefore engagethe valve seat I8 when the dentifrice expands due to climatic conditions and prevent the loss ofthe dentifrice. The Valve |38 is provided on the lower end with a stem 139 which is received in the opening |36 of the boss 5. The boss 5 is provided with opposed radia1 passages Il led laterally through the boss to communicate with the passage l2 when the valve |38 is seated in the opening |36. Packing I9 is also used in this structure as shown in Figure l. Therefore, the float valve 38 has been substituted in Figures 30 and 3l for the spring pressed valve 'l as shown in Figure 1, otherwise the operation of the device is the same.

As shown in Figure 25, the piston |82 is similar in contour to the inner wall of the chamber or housing 88. These parts may vary in form from a rectangle with radius corners to an ellipse. A piston and chamber of any of these forms permits a comparatively great amount of air to be forced into the dentifrice supply chamber, whereby to speed up the application of the dentifrice to the bristles of the brush.

Having described my invention, its objects, construction, advantages and operation in detail, it is again emphasized that interpretation of its scope should only be conclusive when made in the light of the subjoined claims.

I claim:

l. A fountain tooth brush dispensing means, comprising a hollow elongated body part forming a reservoir for dentifrice, a casing in the dentifrioe reservoir having an inlet valve and an outlet valve, a rotatable air pressure cylinder in the casing having ports selectively registering with the valves in the casing when the cylinder is turned, a piston in the cylinder for forcing air into the dentifrice reservoir or withdrawing air from said reservoir, manually controlled intake and outlet valves in the piston, and a pressure operated valve in the reservoir and normally closing a dispensing conduit to the body part when there is no pressure in the reservoir.

2. rEhe invention as defined in claim l, wherein the valves in the casing are opposed pressed ball check valves, one being an inlet valve and the other an outlet valve, and Wherein the piston has opposed spring pressed ball check valves, one being an inlet valve and the other an outlet valve, and adjustable valve rods engaging said latter valves to manually close or open the same.

3. The invention as defined in claim 1 wherein the piston has a sectional piston rod, one section being threaded on the other section, a nut on the rod, a threaded extension on the nut engaging the cylinder to attach removably the nut thereon, and means ,for limiting the rotary movement of the cylinder.

4. The invention as defined in claim lwherein the body is substantially elliptical in cross section, and wherein the piston valves have manually operable valve control rods, a sectional eXtensible rod on the piston, and the valve rods being parallel with the piston rod and movable with the piston to position a part thereof without the cylinder to be grasped for manual operation.

5. A fountain tooth brush dispensing means, comprising a hollow body to contain dentifrice and a brush head on the end of the body and having a channel within the head providing communicating means between the hollow body and a remote portion oft he head,v a spring seated pressure'operated valve in the body controlling 'passage of dentifrice to the channel of the head,

a removable cap on the other end of the body va centrally disposed tubular casing carried by the body and extended inwardly from the end thereof opposite to the end on which the brush :head is carried, an air pressure cylinder rotatably mounted in the said tubular casing in the body, a .piston in the cylinder, and a plurality of valves, one set of which is carried by the casing,l and another set carried by the piston, said cylinder formed with ports selectively registering with the rst set of valves when the cylinder is turned.

6. In a fountain tooth brush dispensing means,

comprising a hollow body to contain dentifrice,-

a tapered cylindrical pressure operated float valve in the body controlling passage of dentifrice t0 a dispensing channel, a removable cap 'on the end of the body opposite to that in which the channel isY positioned, a rotatable control unit in said body, means for rotating v'said unit extended therefrom, a piston mounted in said unit, a casing carried by the body for mounting said unit, and a plurality of valves, one set of which is carried by the casing and another set by the piston, and a plate in said casing formed with ports selectively registering with rst mentioned valves when the control unit is rotated.

' 7. In a fountain tooth brush, the 4combination 'which comprises an elongated substantially hollow tubular handle, a brush head having an offset shank carried by one end of the handle, said shank of the brush head having a passage theresaid piston having a stem extended from the end of the cylinder, a head including a disc with a knurled peripheral surface carried by the end of the stem, a cap removably mounted on the 'end of the handle covering the said nger gripping head of the stenrof the piston, valves mounted in the inner end of the cylindrical casing, valves inthe piston, said cylinder having an opening in the end thereof positioned to register with the valves in the inner end of the cylindrical casing alternately, and means adjusting the valves in the piston.

8. In a fountain tooth brush, the combination which comprises an elongated substantially hollow tubular handle oval shape in cross section, a brush head having an offset shank carried by the inner end of the handle, said shank of the brush head having a passage therethrough providing communicatingrneans between the interior of the handle and the brush head, a cap removably mounted on the inner end of the handle andpositioned to cover the brush head, a ow control valve in the inner end of the handle for controlling the amount of a dentifrioe passing through the said shank to the brush head, the casing extended into the said hollow tubular handle from the outer end thereof and having aninletvalve and an outlet valve site or outer end of the handle for pumping l0 dentifrice from the handle to the brush head and for drawing a dentifrice through the brush head to the handle.

LUDWIG F. PERWAS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 829,449 Whaley et al. Aug. 28, 1906 1,235,351 McLaughlin July 31, 1917 1,299,487 Loeben Apr. 8, 1919 1,466,896 Frame Sept. 4, 1923 1,945,023 Cleveland et al. Jan. 30, 1934 2,107,242 Gates Feb. 1, 1938 2,405,681 Woock Aug. 13, 1946

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