US2113333A - Greasing apparatus - Google Patents

Description

April 5, 1938. E. PIQUERZ GREASING APPARATUS Filed Deo. 24, 1936 4 Sheets-Sheet 2 April 5, 193s. E. PIQUEREZ' GREAs ING APPARATUS 4 sheets-sheet 5 -Filed Deo. 24, 1956 11 ..1 l aiminis.:El:nini:iinniililliiiiit..D

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April 5, 1938. E. PIQUEREZ 2,113,333

GREASING APPARATUS A Filed Dec] 24, 1936 4 sheets-sheet 4 w TW: l

/ lol Patented Apr. 5, 1938 *UNITED STATES PATENT OFFICE GREASING APPARATUS Emile Piquerez, Saint Cloud, France Application December 24, 1936, Serial No. 117,654 In France December 31, 1935 6 Claims.

' combination, the cartridge has been closely surrounded by the rigid wall of the reservoir or the pump cylinder, according to whether the reservoir is independentl or is a part of the pump cylinder, and encloses in most cases a piston applied under pressure against the surface of the lubricant. In general, such apparatus has not given satisfactory results, as the cartridge has been only incomplete- 1y emptied owing to lthe fact that responsive to the pressure, the weakly supported wall of the 'cartridge was deformed and became creased and imprisoned small masses of lubricant which never reached the outlet.

Thepresent invention has for its object to overcome this drawback. For this purpose it essentially consists in the fact that thecartridge is no longer provided with an outer casing, but with an inner reinforcement formed by the Wall of the reservoir Ior the pump cylinder itself from which the lubricant is expelled, either directly to the outside, or towards a high pressure cylinder, the transfer of the lubricant from the cartridge to said cylinder being automatically effected when one penetrates into the other. A

Theapparatus according to the invention can In the apparatus of the rst class, the frame of -the apparatus is provided with a base to support the cartridge from which the upper cover has been previously removed and which is provided with an opening at its lower part, whereas the pump cylinder or reservoir, which is provided with a single cover at the upper part, is removable from said frame and can be inserted in said cartridge, and has means for connecting it to the frame.

In a particularly advantageous embodiment, the cover of the pump cylinder or of the reservoir is provided with an overlapping crown provided witli a threaded collar, or with any other appropriate means which can be connected with a covering casing of the frame which extends from the base of the frame around the cartridge. The delivery system carried by the removable pump cylinder cover can be of any kind. It can comprise a sufficiently large piston delivering directly at low Apressure into an outlet nipple car rled by the base of the apparatus, or it can com prise a follower piston which is free to be driven by a supply of air under pressure, said piston effecting the filling of an apparatus in which a plunger piston is displaceable and which is guided and supported by the-upper cover of the removable pump cylinder.

In the case of a reservoir which is independent v of the pump, the removable body of the reservoir .lo

will be provided with a follower piston which is free to be driven by compressed air, so that it drives the lubricant towards the pump cylinder.

The apparatus of the second type is principally characterized by the combination of a pump or reservoir cylinder xedly mounted on the base of the apparatus and open at its upper part, of a cartridge tted onto said pump cylinder, and of an outer casing secured to the cover and screwpiston or pistons, whereas the delivery nipple and optionally the high pressure chamber are integral with or are secured to the base of the apparatus.

In a modified embodiment, the cover does not carry any delivery member and the pump cylinder is displaceable relatively to the follower and delivery piston mounted at the end of the delivery nipple. Theinvention providesv furthermore means for ensuring hermeticity between the pump cylinder or the reservoir and the outlet of the cartridge, in an apparatus of the first kind.

For this purpose, the lower end of the pump body or of the reservoir is adapted to ilatten the lower closure beading of the cartridge in a groove provided in the base of the apparatus, so that the said beading serves as a joint.

This arrangement is applicable with a cartridge and a pump or reservoir body which are cylindrical. However, according to an improved embodiv ment, the lower part of the cartridge is slightly conical and the lower part of the pump or reservoir body is amply bevelled so as to accurately erigage in the inner angle of the cartridge cover to cause a rational crushing of the entire beading.

This device can be advantageously completed by providing at the lower part of the pump or reservoir 'body and inside same, a ring which is adapted to stop the follower piston at the end of its stroke and also to cooperate in attening ing onto the base, the cover carrying the delivery 20 v as Fig. 1 but-provided with a high pressure delivery system. Y

Fig; 3 is a section showing the application of the same type of apparatus to a compressed air delivery apparatus.

Fig. 4 is a section of an apparatus of the rstmentioned type having an independent reservoir.

Fig. 5 is a section of an apparatus of the second type, that is to say constructed for the cartridge to be fitted onto the pump cylinder or reservoir body.

Fig. 6 is a vertical section of an apparatus of the second type.

Fig. 7 isa section of an improved system for ensuring hermeticity between the cartridge .and the lubricant outlet.

Fig. 8 is a sectional view of an apparatus according to Fig. 2 modied to include the means for sealing the cartridge against the support, according to Fig. '7.

Inthe embodiment of Fig. 1, the invention is applied, for example, to a low pressure delivery apparatus The apparatus comprises a base I on which is mounted a casing 2 concentrically with a circular groove 3 provided in said base. Said groove is adapted to receive the beading 4` formed by the seam of the cover 5 and of the side wall of the grease cartridge 6. ,A suillcient space allowance is provided to enable the car. tridge to be easily placed in position on its support, after having removed its upper cover from the -said cartridge and having removed the closure of its lower orifice 1. The orifice 'I places the cartridge in communication with the outlet nipple 6 of the pump.

At its upper part, the casing 2 has for example a thread 2a to receive a screwed cover 3 which forms the upper cover of the pump casing which is ilxed thereto in any appropriate manner.

The casing Il has no lower cover and its outer diameter is slightly less than the inner diameter ofthe cartridge 6. The lower edge of its wall can advantageously bevelled at loa as shown, to form a scraper. At the top the casing I is provided with an air vent hole, its capacity below `said hole being at least equal to that of the cartridge.

The cover 9 has at its 'center a tapped hub in which the rod Il of the piston I2 screws, which can be operated by an outer handle.

The lining of the apparatus is effected as follows: The cover S and the pump casing I0 are disconnected from the frame and the piston I2 is positioned at top 'of the casing Il above the air vent i3.

After having removed the upper cover and the closure of the orifice 1 of the cartridge, the cartridge is placed in position' on the base I, so that the beading 4 is accommodated in the groove 3. Then the lower edge of the pump casing I0 is held above the cartridge and said casing is progressively pusheds into the cartridge. The grease containedin the cartridge then penetrates gradually into the pump body, driving out the air through the hole I3. As it moves downwards the bevelled edge Ila scrapes the grease and when it reaches the bottom of its stroke, correponding to the screwing of the cover, it flattens the beading 4 in its groove thereby ensuring hermeticity between the cartridge and the outlet nipple.. A few turns ofthe pump. screw are then given to bring the piston l2 into ,contact with the grease and the apparatus is ready .to deliver at low pressure.

Fig. 2 shows the application of the same arrangements to a high pressure greasing apparatus. A

In this case, a connection vI4 supplies compressed air above the piston |21 which is a simple follower piston adapted to slide freely on the rod I which itself slides through the cover 9a, the lower extension of said rod forming a high pressure piston. Saidpiston is displaced in the high pressure cylinder i6 provided on the base la, and having inlet ports i1. .Beyond said cylinder is mounted a delivery valve I8. f,

Without changing the characteristic arrangements of the invention, a third apparatus can be constructed by eliminating the connection i4, the follower piston being in that ca'se displaced under the influence of atmospheric pressure.

'.I'he'mounting, as regards the cartridge and the pump body, is effected as before with the sole difference that when the pump cylinder is about to be entered into the cartridge, the follower piston is placed at the lower part of said cylinder, so that it is pushed upwards by the grease, as the cylinder I0 is pushed in. During this operation, the air outlet I9 remains open.

Fig. 3 shows the application of the same arrangements to an apparatus in which the disof the grease pump. The cylinder 26 is pressed against the partition 24 by a nut 21. In said cylinder the piston 28 is displaceable,and is directly connected to a compressed air driven piston 29. A hermetic packing 30 is lodged in theA opening of the partition 24; said packing being pressed against the end of the cylinder 26 by a spring'3l which bears with its other end on the' rear face of the compressed air driven piston 29.

A double acting valve controls the inlet and exhaust of the air. Said valve is housed in an extension 32 of the body of the apparatus. In this. portion of the part are provided various housings, in which is placed double seat 33'held in place by a hollownut 34. A valve 3 5 urged by a spring 36 is pressed against the lower part of said seat.. At the'upper part of the double seat 33 is provided the seat of a needle valve `31; said needle valve being extended by a rod 36 of smaller diameter than the central duct of the part 33 and which, when at rest, comes into contact with the head of the valve 35 in such a manner that when the needle valve 31 is seated, the valve 35 is open, and conversely.

'Ihe ducts provided in the middle of the part 33 communicate through the duct 39 with the end of the air driven cylinder, whereas the housbears on an operating handle 4I carried by a grasp handle 42. A retracting spring 43 tends to' hold the needle valve constantly away from its Seat.

` vAt theV opposite part ofthe grasp handle, the

The base 43 has a groove 49 for housing the beading-4 of the grease cartridge 6 and it carries the casing 50. The cover 5| carries the reservoir body 52 in which the follower piston 53 is displaceable. Said cover fits into the casing and fits over a hollowrod 54 vscrewed into hole 41. T'he locking of the cover is eected by a nut 55.

'Ihe cartridge being in position and a source of compressed air being connected to the orifice of the plug 34, the operation is as follows:

`to open.

When the handle,4| is depressed, the'needle valve 31 is applied onits seat, whereas the extension 38 bears on the valve 35 and compels it The compressed air thus penetrates into the duct 39 and into the duct 48. Through .the first it reaches the air cylinder and pushes the piston forward compressing the spring 3|. At the same time the air introduced through the duct 48 and the hole 41 penetrates into the duct 56 of the rod 54, lifting the ball 51 and through vthe orifices 60, flows between the cover 5| and the piston'53 compel-ling the latter to drive the grease above it.

The grease is thus forced through the duct 45.

and reaches the ports 46 of the grease cylinder. When the handle 4| is released, the valve 35 closes again, cutting'off the supply of compressed air, whereas the needle valve 31 places the duct 38 in communication with the atmosphere through the orifice 40. The airwhich is in the cylinder escapes by this path.

During this period of exhaust, the air introduced behind the piston 53 cannot escape since 'drives out this lubricant beyond the pump 6| towards the place where it is to be used. At the same time a certain quantity of air is again introduced behind the piston 53 of the grease reserv voir.

Fig. 4 shows the application of the same characteristic arrangements toa greasing apparatus having an independent reservoir.

The body 80 of .the apparatus in which is formed the high pressure cylinder 8| has at one side a base 82 provided with a central orifice 83 which communicates with said cylinder and means suchv as a threaded collar for xing the casing,r 84 thereto. Said base also has a groove. 85 for housing the beading 4 of the cartridge 6. The cylinder 86 of the reservoir is dimensioned to t Within the cartridge 6 and the casing 84 in the same manner as the cylinder |0 ofthe preceding embodiments with respect to the cartridge 0 and the casing 2.' It is secured to a cover 81 which screws onto the top of the casing 84 and has an air orifice 88 adapted to enable the action 'of atmospheric pressure to be exerted on thefree follower piston 89.

as-in the embodiment shown and described in connection with Fig. 2.

Fig. 5 shows a first embodiment of an apparatusof the second type, that is to say adapted to be mounted in the reverse manner to the preceding ones, by fitting the cartridge Yonto the A pump body; said apparatus being for example of the low pressure type.

Thebase |00 in this embodiment carries the pump body |0| and receives the casing |02 which is secured to the coverl03 when the cartridge 6, which is v turned upside down after removing 'one of its covers, is placed in position, the outer diameter of the body |0'I being dimensioned as before, so that the inner wall of the cartridge is scraped by the edge |0|a.

The cover |03 is screwed and soldered on the upper end of the casing |02. It has a bulge |04 of which the inner wall |04a comes into align- Said flange is formed for example by the juxtaposition oftwothicknesses: that of the body and that-of the flange of the cover, pinched together by fasteners spaced at intervals. In i this manner, in spite of the necessity for aligning the wall |04'a with the wall |0|b, a preferably outwardly bevelled projection |05 canr. be made integral with the cover, to push backV and hold the flange 4a outside the path of the piston |06. The latter, which when at rest is lodged in' the cover, is preferably ofv the rigid type, that is to say, does not have a flexible shank, becausev of the empty space to be passed between the two walls |04a, |0|b.

washers |08, the leather washer being slightly larger than the cork disc so as to rub on the walls.

This apparatus is provided with a plunger piston |09 adapted to cooperate with the high pressure cylinder ||0 formed in the base |00, to deliver through the valve It comprises for example aA cork disc |06, a leather washer |01, and 'two metal 'I'he mounting and filling operation is effected in the following manner:

formed by the casing |02 and the cover |03. .The

whole arrangement is then turned over .on the body`| 0| and is gradually pushed in until the edge of the end of the cartridge which is at the upper part, bears against the top of the body 0|, which is finally obtained' byfscrewi'ng the casing on 'the base. pushed, it is actuated several times lightly, to drive out the air if necessary, and when the grease reaches the cylinder |'I0 the apparatus is ready to operate.

The arrangements accordingto the invention, of the apparatus of Fig. 5 necessitate, asr has just been seen, the removal of the second cover of the cartridge.

'The arrangements s hown in Fig. 6 obviate this necessity.

On the cover or base |20 is fixed the pump body |2.|and is screwed the casing |22 which is secured atits upper part to the cover |23. latter is adapted to hold the beading 4 ofthe cartridge 6 in cooperation with .the top of the The piston' |09 is then.

The.

to be supplied, the delivery being effected by pressing on the actual body of the apparatus.

In the embodiments of YFigs. 5. and 6, the casing could obviously be disconnected from the cover and fixed beforehand on the base, but under` these circumstances the pushing in of the cartridge would be very inconvenient. would be positioned last.

A number of other modifications are obviously included in the scope of the invention, since the latter can be applied to all apparatus having a suitable reservoir, whether said reservoir forms a pump cylinder or whether it is independent of the latter.

In the foregoing, it has been mentioned that the hermeticity between the cartridge and the lubricant outlet could be obtained by crushing the peripheral beading of the. cover between the supporting base, or the cover, and the end of the pump or reservoir body. v

To obtain the'crushing of said beading under completely rational conditions, it will be advantageous to use the arrangement -of Fig. 7 which essentially consists in providing at-the end of the pump or reservoir body 13|, a long bevel 13| and in disengaging the beading |32, from the inside,

'The cover and in providing on the cartridge immediately above the end a conical portion |33 corresponding to said bevel. Outside the cartridge, the base could also have a conical bearing portion |34. It will be readily seen that owing to this arrangement, the sharp end of the body will engage with certainty in the inner Aangle of thebeading and will push the latter towards the joint wall |35.

The device can be completed by mounting at the bottom of the body ill, a retaining ring or cord |36 for the follower piston, which have an oblique face |31 suitably directed to cooperate in crushing the beading |32. Such an arrangement could moreover be used with the preceding devices. Flg. 8 illustrates the arrangementapplied toan apparatusotherwise similar to that of Figi 2. A

What I claim is: 1. In a greasing apparatus, a grease of iiexible material having side walls and an end wall connected by an inwardly rolled seam, a

. frame having a support for supporting said end wall of the grease cartridge, acasing surrounding the sides of the cartdge, a cylinder slidable into the cartridge fitting closely against said side walls, and engaging the rolled seam and flattening it against the support to seal the periphery of the end, said end wall having a central opening, and the support 'discharge communicating with said opening and means for pressing grease from said cartridge through said opening.`

2. In 'a greasing apparatus, a grease cartridge of flexible material having side walls and an end wall, said walls connected by an inwardly rolled seam, the side walls being conical in the vicinity of the end wall, a supporting base for supporting the end wall of the cartridge, a casing surrounding the side walls of the cartridge and being formed conically adjacent the conical portion of the cartridge, said supporting base having an annular groove extending therearound cartridge- `body |2I and to provide a bearing race |234:

adjacent the seam of the cartridge for receiving said seam, a cylinder slidable within the cartridge from the end opposite the Asupport and closely ttiug the side walls of the cartridge, said cylinder being bevelled at its inner 'end tov conform with the conicity of the cartridge, the inner end of said cylinder having an inwardly` extending ring adapted to engage the seam and press the seam into saidgroove to form a. seal between the outer edge of the end wall of the cartridge and the support, said end of the cartridge having a central discharge opening, said support having.

a discharge passage, and means for forcing grease from said opening to said passage. A

3. In combination: a supporting base, a casing forming a cover at the upper part of `said reservoir, a low pressure piston displaceable in said cylinder and a plunger piston passing through the cover of the reservoir cylinder and the low pressure piston.

4. In combination: a reservoircylinder of a greasing apparatus openat its upper part, a

` base for said cylinder, a cartridge of lubricant made of paper and the like ttedvonto said cylinder, an outer casing fitted onto said cartridge and adapted to be removablyxed to the afore- Vsaid base. a cover secured to the upper part of the casing, a follower piston lodged in said cover, a plunger piston passing .through said cover and said'follower piston and removable as a unit with said cover, said follower piston and the casing; and a high pressure cylinder, and a delivery valve both in the base of the reservoir cylinder.

5. Supply reservoir -for a greasing apparatus l comprising: a metal casing, a base for said casing; a cartridge of lubricant made of paper and the like provided with a lower cover and havingno uppercover', the side wall of said cartridge having a conical portion adjacent said cover, said conical portion being connected .to said cover by a fastening forming a projecting beading;V said cartridge being engaged in said casing with its lower cover pressed against the base of the casing; and the base of the casing having a groove to receive the projecting beading of the cartridge of lubricant, a. metal reservoir body adapted to be pushed into said cartridge in contact with its wall, the end of said body having an -outer bevel corresponding to the conicity of the part of the side wall of the cartridge adjacent the cover of the latter so that said end of the reservoir body .can completely crush the beading of the cartridge when said body is fully pushed l in place.

6. In combination: a metal casing and abase for said casing; a high pressure cylinder and a delivery valve in said base; a cartridge of lubricant made of paper or the like provided with a lower cover and having no upper cover, the side walls of said cartridge having a conical portion adjacent .said cover, said=conical portion being connected to said cover by a' fastening forming a projecting beading; 'said cartridge being engaged in said casing with its lower cover pressed against the'base of the casing; and the base of the casing having a grooveto receive the projecting bead# l5 tlxed on said base, a high pressure cylinder in ing oi' the cartridge' o'f lubricant; a metal reservoir body adapted to be pushed into said cartridge in contact with its WaIL'the end of said A Abody having an outer bevel corresponding to the cartridge.

reservoir body, saidvring being adapted to co-v operate ior iiattening the beading of the cartridge; an upper cover secured to the reservoir body, said cover having a flange adapted to be removably connected with the top of the casing when thereservoir body is fully pushed in place in the cartridge, said body having an orice .to allow air to escape when it is pushed into said Emma Pr'QUEREz. 10

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