US1647538A - Lubricating apparatus - Google Patents

Description

H. J. MURPHY LUBRI-CATING APPARATUS- Filed Feb. 11. 1925 Nov. '1, 1927.'

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HOWVARID J". MURPHY, 0F READING, .MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE BASSICK MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF DELAWARE Application filed February This invention aims to provide an improved pressure lubricating system.

In the drawings, which illustrate a preferred form of my invention Figure 1 is a central longitudinalsection of a lubricant-expelling gun, being partly in elevation; p

Fig. 2 is an enlarged central longitudinal section of the nozzle shown in 1, with the lubricant-receiving part partly engaged in the nozzle, some of the "parts being in elevation; and

Fig. 3 is a section similar to Fig. 2, but wlth the lubricant-receiving part fully entered within the nozzle and the valve fully opened.

Referring to the drawings, I have shown a lubricant-expelling device which is simple,

compact and inexpensive in construction,

and which also includes means for expelling lubricant under a relativelylow potential pressure, a relatively high potential or .an initial high pressure and then a low pressure, all of which may be accomplished by very simple Operations. With the device. illustrated, lubricant may be expelled under relatively higher potential pressure with a lesser amount of torque than has heretofore been possible in other known devices for similar use.

The drawings show a lubricant-expelling gun including a barrel 1 having a rear head 2 .into which is threaded a plungerstem '3 carrying the usual plunger 4 interiorly of the barrel 1, and a handle 5. At the discharge end of the gun, I have shown a front head 6, which is formed as a part of the barrel 1 and tapers from the barrel of the gun to a forwardly-projecting portion 7 interiorly threaded to engage the exterior threads of a nozzle part hereinafter more fully describedj A coupling member 9 is threadedly secured to the intermediate part 8 and presents interiorly thereof relatively steep pitch threads, herein shown as triple, for engage: ment with the threads on the lubricant-receiving part or nipple 9 as illustrated in p tratedin Figs. 2 and 3. The coupling member 9 is also provided Figs. 2 and 3.

with a steel washer 10 and a sealing or hat washer 11, which are held in place between the end of the aligning part Sand a shoulder in the coupling 9 thereby to provide sealing 11, 1925. Serial No. 8,582.

means to prevent leakage of lubricant past the periphery of the lubricant-receiving nipple 9 (Fig. Thus the lubricant-receiving nipple, coupling and sealing means are substantially as shown and more fullydescribed in my co-pending application Serial No. 616,302. v p

The nozzle 6 of the lubricant-expelling device is provided with a lubricant-receiving chamber 12 having means at .each end thereof for entrapping the lubricant in the chamher. At the discharge end of the chamber 12, I have provided an inwardly Opening closure valve 13 which is normally held seated against the valveseat 15 by suitable spring means herein shown as a spring 16. At the inner end of the chamber 12, I have provided a valve-carrying part 17, which carries an means herein shown as a spring 19 interposed between the check valve and a collar 20.

'outwardly opening check valve 18 normally -urged into closed position by suitable spring The collar 20 is driven into the open end of the valve-carrying part 17 and provides a seat for one end of the spring 16 and one end of the spring 19.

Engagement of the lubricant-expelling gun with the lubricant-receiving nipple 9 rotated in a clockwise direction and the Thus the coupling member 9, which is rigidly secured to the barrel 1, is

female threads located in the coupling engage the male threads on the lubricant-receiving nipple, thereby drawing the coupling member 9' over nipple. During coupling engagement of-the lubricant expelling gun with the lubricantreceiving nipple, the smooth end 21 of the nipple passes through an aperture in the washer 10 and the hat washer 11 and forces inwardly the closure valve'13, as-best illus- The steel washer 10 provides a new and useful function in this device because it not only centers the'nozzle relative to the nipple but also acts as a stop against which the male threads of the nipple may abut during the lubricant-receiving coupling action, thereby to limit the movement of the nozzle .over the nipple, as best illustrated in Fig. 3.

' Rotation of the handle 5 in a clockwise direction after the lubricant-expelling gun has been coupled with the lubricant-receiving nipple, forces the piston 4 inwardly rela tive to the barrel 1, thereby forcing lubricant under relatively low pressure from the barrel past the ball check 18 through the chamber 12, and then past the closure valve 13 and through the slot 22 in the front end of the closure valve into the lubricant-receiving nipple 9. Lubricantforced into the lubricant-receiving nipple in the above-mentioned manner is under a relatively low potential pressure which is sufficient to lubricate a bearing free from dirt or hardened lubricant. The low potential pressure will depend on the diameter of the barrel, the pitch of the threads on the stem 3 and the torque applied thereto. As compared with the high potential pressure hereinafter described,

pressures of even one or two thousand pounds per square inch may be considered low. 1

Tf a .bearing cannot be properly lubricated with lubricant that is forced to it under a relatively low potential pressure,,the pressure of the lubricant may be greatly in ;creased by permitting the barrel 1 to be turned in a contra-clockwise direction so that the closure valve 13 may return to its seat and allow the chamber 12 to become filled with lubricant. The chamber 12, as the valve 13 closes, becomes filled with lubricant because the pressure on the lubricant in the barrel forces some of the lubricant past the. ball check 18. and into the chamber 12.

By turning the handle 5 again in a clockwise direction, the closure valve 13 is forced open and into the chamber 12 by the smooth end of the lubricant-receiving nipple 9,

which acts asa displacing plunger to force lubricant from; the chamber 12 at a relatively high potential'pressure. When forcing lubricant under high pressure, the torque exerted upon the handle 5 does not have to be as great as when forcing lubricant under low pressure. While the lubricant is being thus forced from the chamber 12, it is prevented from leaking back into the barrel 1 .by the the gun over the smooth end 21 of the nipple 9 substantially as described in the above- -mentioned application.

Even aside from ts broader aspects, the construction illustrated lnvolves many important features. Thus the inwardly opening valve 13 prevents leakage of lubricant when the nozzle is disconnected from the -nipple, notwithstanding that very substantial pressure may be left in the barrel 1, and the location of this valve in front of the compression chamber instead of behind it .entraps lubricant so that it will not run out when disengaged even. though very fluid. Additionally, in ordinary operation the chamber 12 will be full each time that the nozzle is disconnected from a nipple so that during the coupling operation the next nipple i'sautomatically subjected to a very high potential pressure, say 12,000 pounds or more. Of course the actual pressure exerted will depend upon theresistanc'e op; posed to expulsion of' the lubricant fromthe chamber 12, and when the bearing to be lubricated "is free, very little of the potential pressure may be utilized, the coupling-operationrequiring correspondingly less torque.

While I have shown and described a preferred form of one embodiment of my in involving omission, alteration, substitution 1} and reversal of parts, and even changes in.

vention, it will be. understood that changes the mode of operation, may be madewitliev out departing from the scope of my inven tion, which is best defined in the following claims. 1'

I claim 1. Lubricant apparatus for injecting or oil into machine bearings comprising, in" combination, a source of lubricant under pressure above atmospheric,-Lmeans forming a chamber in lubricant communication with too said source and a coupling for connection to av lubricant receiving nipple, said coupling having a movable connection with said nipple permitting the latter alternately to expand and contract the effective volumetric lubricant receiving capacity of said chember, sealing means engaging the periphery of said nipple'for rendering fluid tight the joint between said coupling and nipple, and valvular means controlling lubricant flow from said source into said chamber eifective to permit flow only from said source to said chamber and to prevent return flow.

' 2. Lubricant apparatus for injecting grease or oil into machine bearings through lubricant receiving nipples associated with said bearings comprising, in combination, a. lubricant reservoir provided with a lubricant exit and lubricant'displacing means for forcing lubricant from said reservoir through said exit, lubricant conducting conduit means receiving the lubricant from'said exit,

accuses nipples, cooperating cam means on said n1 ples and said conduit means for causing re ative rotation of said conduit means andnipples to eifect relative reciprocation of the two for alternately expanding and contracting the volumetric lubricant receiving capacity ofsaid conduit means, and valvular means for closing communicationbetween said conduit means and reservoir when the capacity of said conduit means is being contracted and for establishing such communication when the capacity is being expanded,

valve means adjacent the discharge end of said conduit means for positively preventing egress of lubricant'when the nipple is removed therefrom, and sealing means for rendering lubricant tight the joint between said nipple andnozzle when said nipple is entered into said conduit means and said valve means is opened to said conduit means.

3. Apparatus for injecting oil or grease into machine bearingscomprising, in combination, means providing a source of lubricant under pressure, lubricant conducting conduit means connected to said source comprising a discharge nozzle adapted to receive'a lubricant receiving nipple, said conduit means having a check valveand nor-' mally closed valve means beyond said check valve, said check valve operative to permit flow of lubricant from said source toward said nozzle and to oppose return flow, and said normally closed valve means adapted to be positively opened when the'nipple is en-.

tered into said nozzle. 4. Apparatus for in ecting Oll or grease into machine bearings comprising, in combination, means providing a-source of lubricant under pressure, lubricant conducting conduit' means connected to said source comprising a discharge nozzle adapted toreceive a lubricant receiving nipple, said conduit means having a check valve and normally closed valve means beyond said check valve, said check valve operative to permit flow of lubricant .from said source toward said nozzle and to oppose return flow, said normally closed valve means in said nozzle adapted to be mechanically opened when the nipple is entered into said nozzle, and sealing means for rendering fluid tight the joint between said nozzle and nipple.

Apparatus for injecting oil or grease .into machine bearings comprising, in combination, means providin a source of lubricant under pressure, lubricant conducting conduit means connected to said source comprising a discharge'nozzle adapted to receive a lubricant receiving nipple, said conduit means having a check valve and normally closed valve means beyond said check valve, said check valve operative to permit flow of lubricant from said source toward said noz-' permit discharge from closed valve means adapted to be opened said nipple and partly by said nozzle for drawing one toward the other by relative rotation for compressing the lubricant in ad- Vance of the check valve during opening movement of said normally closed valve.

" 6. Lubricant apparatus for injecting or oil under pressure into machine bearings comprising, in combination, means forming a chamber, asource' of lubricant under pres sure above atmospheric, said source connect; ed to said chamber throu h, valve means permitting passage of In ricant from said source to said chamber and preventing return flow, a lubricant receiving nipple, a coupling for connecting said chamber to said nipple providing for relative movement between said nipple and coupling for forcing lubricant from said chamber into said nipple, a closure valve in said coupling adapted to be opened when said coupling is. connected to said nipple, and a check valve in said nipple acting to prevent escape of lubricant therefrom. Y.

7. .Lubricant' apparatus for injecting grease or oil under pressure into machine bearings comprising, in combination, means forming a chamber, a source of lubricant un der pressure aboveatmospheric, said source connected to said chamber through valve means permitting passage of lubricant from said source to said chamber and preventing return flow, a lubricant receiving nipple, a coupling for connecting said chamber to said nipple providing for relative movement between said nipple-andcoupling for forcing lubricant from saidchamber into said nipple, inwardly opening valve means at one when the lubricant receiving nipple is entered into said coupling, sealing means pro-. viding a lubricant tight seal between said coupling and said nipple, and a check valve in said nipple acting to prevent escape of lubricant therefrom. I

8. Lubricant apparatus for injecting grease or oil under pressure into machine bearings comprising, in combination, means forming a chamber, a source of lubricant under pressure above atmospheric, said source connected to said chamber through valve means permitting passage of lubricant from said source to said chamber and preventing return flow, a lubricant receiving nipple, a coupling for connecting said chamber to said nipple providing for relative movement between said, nipple and coupling for forcing lubricant from said chamber into said nipple, and sealing means carried by said coupling for engagement with the periphery of said nipple to provide a lubricant tight seal between said coupling and said nipple.

9. Lubricating apparatus comprising, in

combination, a barrel, means for expelling lubricant from:sa1d barrel, means forming a chamber generally aligned with said barrel and presenting-asubstantially smaller crosssectional area than said barrel, a valve controlling communication between said barrel and said chamber to permit passage of lubricant in one direction only,a coupling be-- yond said chamber for engagement with a lubricant-receiving nipple, and valve means at one end of said chamber actuated by relative movement between said coupling and said lubricant-receiving nipple to permit said ripple to discharge lubricant from said.

' said chamber and normally closing said end,

' low potential pressure,

said valve adapted to engage said lubricantreceiving nipple when said chamber is moved toward said lubricant-receiving nipple thereby unseating said-valve and permitting said nipple to force lubricant out of said chamber into said lubricant-receiving nipple under a relatively high potential pressure.

11. Lubricating apparatus comprising, in combination, a barrel, means for expelling lubricant from said barrel under a relatively a handle for manually operating said means, a chamber of substantially smaller cross-sectional area than said barrel located in a fixed relation to said barrel, meanspermitting flow of lubricant from said barrel to said chamber and preventing reverse flow, and a coupling for said chamber for movable engagement with a lubricant-receiving part, said handle operative to expel lubricant under high or low potential pressure into said lubricant-receivin; part. r f 12. Lubricating apparatus comprising, in combination, a barrel, manually operable means for expelling lubricant therefrom, a chamber located in a fixed relation relative to said barrel and having a cross-sectional area substantially less than said barrel, a check valve located at the inner end of said chamber to permit passage of lubricant only from said barrel to said chamber, a coupling for said chamber for engagement with a lubricant receiving part, and means operative in. one direction to permit passage of lubricant from said barrel by way of said cham-. her to said lubricant-receiving part under a relatively low'potential pressure and operative in the opposite direction to prevent lubricant flow from said chamber for permitting filling of said chamber with lubricant from said barrel and thereafter. oper ativein the first-mentioned direction to per-.-v

mit said part to force the lubricant, entrapped in said chamber by said check valve, into said lubricant-receiving part under relatively high potential pressure.

13. Lubricating apparatus comprising, 'in

combination, a barrel, manually-operable expelling means for forcing lubricant'therefrom, a valve-carrying part secured tosaidbarr el, a chamber'in said valve-carrying part presenting a substantially smaller cross-sectional area than said barrel, a coupling secured to said valve-carrying part, for engagement with a lubricant-receiving part, and a valve at the inner end of said chamber to permit passage of lubricant from said barrel into said chamber and ,to prevent return flow, said lubricant thereafter forced from said chamber by relative movement between said coupling and said lubricant-receiving part.

14. A pressure paratus comprising, in combination, a lubricant-receiving chamber "having a relatively small cross-sectional area, a coupling beyond said chamber for engagement with a lubridevice for lubricating apcant-receiving nipple, means for entrapping lubricant in said chamber, a lubricantpressed hat'washer adapted to fit over the end of said lubricant-receiving nipple and a spring-pressed valve normally closingthe outlet end of said chamber, said valve actuated by movement'of said chamber toward said lubricant-receiving nipple to permit check valve located at the inlet end of said chamber to trap the lubricant in said chamber after it has passed said check valve, and a closure valve located at the front end of said chamber and, operated by engagement thereof with the end of said nipple to permit displacement of lubricant from said chamber under relatively high potential pressure by said nipple.

'16. Lubricating apparatus comprising, in combination, a barrel, means for expelling lubricant therefrom, a chamber having a substantially smaller cross-sectional area cant-receiving part presenting cooperating male threads, and a valve engageable .with

- the end of saidlubricant-receiving part and opened thereby to permit passage of lubricant from said barrel through said chamber under a relatively low potential pressure to said lubricant-receiving part when said coupllng is rotated to engage the female threads with the male threads of said lubricant-receiving part.

17. A pressure booster for lubricating apparatus comprising, in combinatlon, means orming a chamber adapted to receive luhricant, valves at both ends of said chamber to trap lubricant therein, a coupling beyond said chamber presenting a plurality of female threads, and a lubricant-receiving part presenting a plurality of male threads for engagement with said female threads, the pitch of said threads being such thatvsaid coupling may be rotated by thevpressure of lubricant in said" chamber when said coupling is engaged ing part.

18. Lubricating apparatus comprising, in combination, a barrel, manuallyv operable means for expelling lubricant from said barrel under relatively low potential pressure, means-forming a chamber rigidly secured to said-barrel, a coupling for said chamber rigidly secured thereto for en agement with a lubricant-receiving nipp e, a ball checkbetween said barrel and said chamber'for trapping the lubricant in said chamber, and a closure -valve at the outlet I end of said chamber operable by said nipple to permit entrance of said nipple into said chamber whereby to force lubricant from said chamber into said nipple under a rela- 19. Lubricating apparatus comprising, in combination, a container for supplying lubricant under a relatively low potential pres sure, a lubricant-receiving nipple presenting the male portion of a coupling, a discharge nozzle, lubricant-conducting conduit means connecting said container with said nozzle, said inozzle having a female portion for coupling engagement with said nipple, said nozzle and nipple presenting cooperating inclined means for drawing said nozzle'over said nipple when said nozzle is turned relative to said nipple, said nozzle containing an inwardly opening closure valve openable by Y said nipple when said nozzle is connected to said nipple, and a check valve insaid 0011'- duit means between said closure valve and said container, said check valve permitting flow of lubricant from said container but opposing reverse flow of the lubricant.

20. Lubricating apparatus comprising, in

combination, a container for supplying luwith said lubricant-receiv-" zle and nipple presenting cooperating inclined means for drawing said nozzle over said nipple when said nozzle is turned relative to said nipple, said nozzle containin an inwardly opening closure valve openab e by said nipple when said'nozzle is connected to said nipple, a check valve in saidconduit means between said closure valve and said-container, said check-valve permitting flow of lubricant from said container but opposing reverse How of the lubricant, and-a peripheral lubricant-pressed seal" in said nozzle seated against the periphery ofsaid nipple during the entire opening and closing of, said closure valve. a

21, Lubricating apparatus comprising, in combination, a container .for supplying lubricant under 'a relatively low potential pressure, a lubricant-receiving nipple presenting the male portion of a coupling, a discharge nozzle, lubricant-conducting conduit. means connecting said container with said nozzle, said nozzle having a female portion for coupling engagement with said nipple, said nozzle and nipple presenting cooperating inclined means for drawing said nozzle combination, a contamer for supplying Inbricant under a relatively low potential pres-.

sure, a lubricant-receiving nipple presenting'the maleportion of a coupling, a discharge nozzle, lubricant-conducting conduitv means connecting sald container with sald nozzle, said nozzle having a female portion for coupling engagement with said nipple,

said nozzle and nipple presenting cooperating inclined-means for drawing said nozzle over said nipple when said nozzle is turned relative to said nipple, said nozzle containing an inwardly opening closure valve openable by said nipple when said nozzle is connected to said nipple, an annular seat for said closure valve having an internal diameter greater than the end portion of said nipple, and a check valve in said": conduit means between said closure valveandsaid container, said checlcvalve permitting flowof lubricant from said container but opposing reverse flow of the lubricant.

23. A lubricant-expelling device comprise ing, in combination, a barrel, a reduced end portion integral with one end of said barrel,

a valve-carrying part adapted to fit said reducedportion-and carrying a check valve adjacent one end thereof and a closure valve adjacent the other end, said part having a high pressurechamber betweensaid valves of a cross-sectional area substantially smaller than said barrel,.coupling means carried by said part for engagementwith a lubri cant-receiving nipple, and a hat washer in said part forwardly of said closure valve for engagement with said nipple. I

Q LQA lubricant-expelling device comprising, in'combination, a barrel, a plunger in said barrel, a threaded stem for said plunger, an operating handle on said stem, a nut for said stem carried by one end of said' barrel, a reduced end portion integral with the end of said barrelopposite said nut, a valvecarrying part adapted to fit said reduced portion and carrying a: check valve adjacent one end thereof and a closure valve adjacent the other end, said part having a high pressure chamber between said valvesrof a 7 ing said displacing member, means forming a nut carried by said receptacle for coaction' with said,stem,a' handle for said stem; andmeans including cooperating cam means on said nozzle and nipple and lubricant conducting passages for effecting -by rotation of said handle connection of said nozzle to said nipple and thereafter forcing lubricant under relatively low-potential pressure from said receptacle into said chamber and from said chamber under relatively high potential pressure into said nipple, said means including a lubricant actuated valve device for interrupting communication between. said re-.

, ceptacle and chamber.

26. Lubricating apparatus for forcinggrease or oil under pressure into machine bearings through nipples associated with said bearings having, 1n combination; means forming a relatively non-rotatable lubricant receiving chamber, nozzle for connection to a nipple, and lubricant receptacle; an operating hand'le connected to a stem. extending into said receptacle, a lubricant displacing member in said receptacle operatively connected to said stem; and means actuated by rotation of said handle for connecting said nozzle to a nipple and thereafter forcing lubricant under relatively low potential pressure by said displacing member from said receptacle into said chamber and forcing the lubricant under relatively high potentia-l pressure from said chamber into said nipple, said meanscomprising a fluid actuated valve device for interrupting communr cation between said receptacle and chamber.

27. Lubricating apparatus for forcing grease or oil under pressure into machine bearings through nipples associated with said bearings having, incombination, means forming alubricant receptacle and communicating lubricant receiving chamber and nozzle for connection to-a nipple, a normally closedvalve device for controlling communication between said cliamber and nozzle, an operating handle, and means actuated by ro-' tation of said handle to eflect forcing of lubricant under relatively low potential pressure from said receptacle into saidchamber and from said chamber under relatively high.

potential pressure past said valve into a nipple, said means comprising a lubricant actuated va'lve device for interrupting communication between said receptacle and chamber. I

28. Lubricating apparatus for forcing grease or oil under pressure into machine bearings through nipples associated with said bearings having, in combination; means forming a relatively non-rotatable lubricant receiving chamber, nozzle for connection to a nipple, and lubricant receptacle, said nozzle having means for sealing the joint between the same and said nipple; an operating ha'ndle connected to a stem extending into said receptacle, alubricant displacing member'in said receptacle operatively con nected to said stem; and means actuated by rotation of said handle for-connecting said nozz'leto a nipple and thereafter forcing lubricant under relatively low potential pressure by said displacing member from said receptacleinto said chamber and forcing the lubricant under relatively high potential pressure from said chamber into said nipple,

said means comprising a fluid actuated valve device for interrupting communication tween said receptacle and chamber.

29 Lubricating apparatus for forcing grease or oil under pressure into machine bearings through nipples associated with said bearings having, in combination; means forming a relatively non-rotatable lubricant receiving chamber, nozzle for connection to a nipple, and lubricant receptacle, said nozzle having sealing means for engaging the ios periphery of said nipple; an operating into said chamber and forcing the lubricant 1 handle connected to a stem extending into under relatively high potential pressure from said receptacle, a lubricant displacing memsaid chamber intosaid nipple, said means ber in said receptacle operatively connected comprising a fluid actuated valve device for to said stem; and means actuated by rotation interrupting communication between said reof said handle for connecting said nozzle to ceptacle and chamber. 15

anipple and thereafter forcing lubricant v .In testimony whereof, I have signed my 'under relatively-low potential pressure by name to this specification.

said displacing member from said receptacle v v HOWARD J. MURPHY.

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