US1998751A - Lubricating device - Google Patents

Description

Aprii 23, 1935. J. L.. cREvELlNG LUBRICATING DEVICE Filed Feb 24, 1952 2 Sheets-Sheet 1 ATTORNEY.

April 23, 1935. J. cREvELlNG 1,998,751

LUBRICATING DEVICE Filed Feb. 24, 1952 2 Sheets-Sheet 2 I N VEN TOR. JOHN L Cf VEL /A/c:

Y, A TTORNEX (I Patented Api. 23,1935

'UNITED STATES ,warcamc nEvrcE John L. Creveling, near Tucson, Ariz., assignor to The Lubrication Corporation, South Bend, Ind., a corporation of Delaware Application February 24, 1932, Serial No. 594,185

10 Claims. (Cl. 2214414) This inventionvrelates to lubricating devices. More particularly it relates to lubricating pumps oi.' the type formed by operatively connecting permanent pump parts with a lubricant container, which'may have been previously f llled having all the above described desirable char-y acteristics and lcapable of producing relatively high pressures.

Further objects of .the invention will be apparent after reading the subjoined description and claims and after viewing the accompanying drawings.

Prior hereto, hand lubricating pumps have usually been iilled by scooping the lubricant from an open container and packing it in the reservoir portion of the lubricating pumpwith the hand or a paddle. In the devices described in this' application, I propose pump parts which may be operatively associated with lubricant -containers for the purpose of forming a complete pump. Moreover, the pump parts include a high pressure portion and also a substantially rigid low pressurercylinder which telescopes within the container and serves to support the 'sides of the container so that the container may be of relatively light construction. As the outside of the container is visibleat animes, advertising matter,

and directions may be printed on the outside of the lubricant container where (inasmuch as such matter is 'upon an article which is to be thrown away after use) the same will not be! objectionable to purchasers. The lubricant container can be,- easily telescoped over the ycylinder and easily withdrawn, and in the assembly and use of the same there should be little excuse for a greasy or dirty exterior.

In general, the devices selected for illustrating my invention each comprise high pressure pump parts secured to a closure for the container, the closure having a supporting cylinder secured on the inner side thereof, the cylinder being' telescopically associated within the container. A follower may be associated with the pump and adapted to contact with the lubricant in the con- `In the accompanying drawings:

Fig. 1 is a view, partly in elevation and partly in section, showing a lubricating gun formed by pump parts associatedv with -a lubricant container;

Fig. 2 is a view, similar to Fig. l, of a modiiled form of a lubricating gun, similarlyl formed;

Fig. 3 is a view, similar to Fig. 1, with a still diiferent form of lubricating pump;

Fig. 4 is a bottom view of the container which is secured to the pump parts shown in Fig. 3; f/

Fig. 5 isa view, similar to Fig. 1, of another lubricant pump; v

Fig. 6 is a viewpartly in elevation and partly in section, of another form of pump;

Fig. '7 is a view, partly in section and partly in elevation, of still another form of pump;

Fig. 8 is a view, partly` in section and partly in elevation, of a still different form; and

Fig. 9 is a detailed sectional view of the pump of Fig. 6, showing a bayonet joint.

Referring in detail-to Fig. 1 of the drawings, a container or can I I is telescoped over a supporting cylinder I2, the latter having its outer end se cured to a closure I3 which is adapted to closev the open' end of the container II as well` as the outer end of the cylinder I2. The closure I 3 is formed with inclined passages Il and I5 which communicate at their inner ends with a conduit I6, which is shown as a. tube secured as by screw threads in the closure I3, the conduit serving to withdraw lubricant'from the cylinder I2. Surrounding the conduit I6 and, if desired, slidably mounted thereon for movement within the cylinj der I2, is an annular follower I1 which is adapted to contact with the surfaceof the lubricant in the container II and the cylinderv I2 and prevent air from piercing the lubricant. A stop may be provided at the inner end of the tube I6 to prevent removal of the piston'or follower I1.

Secured to -the outside of the closure I3 is a casing I 8' into which lubricant passes from the conduit I6, by means of the passages I4 and I5. 'I'he casing 'I8 has areduced extension I9, in which there is telescopically mounted a tubular plunger 2I. 'I'he plunger 2i is provided with a bore 22 and may be, if desired, formed from an ordinary piece of iron pipe. Secured to the outside of the closure I3, as by screw'threads, is a solid iixed plunger 23 which is aligned with the bore 22 and adapted to enter the bore as. the

. tubular plunger 2l is telescoped within the casing I8, so that the reciprocation serves to 'pui'xfip lubricant through the tubular plunger. Interposed in a. chamber 25, formed inthe enlarged'portion of the casing I8 between the closure -I3 and the inner end of the tubular plunger 2|, is a spring 24 which normally urges the plunger 2I into the forward position shown. A check valve is inserted in the tubular plunger 2l, as at 26; a vent In loading and operating this form of lubricating' pump, the cover is removed from the container and the container is then telescoped over the cylinder I2, the lubricant thus being forced cleanly into the cylinder. Prior to the lling operation, the follower |1 is positioned adjacent to the open end of the cylinder |2 and, as

the lubricant is forced in, is itself forced toward the other end of the cylinder, thus eliminating air pockets. Then the pump is applied to the fitting to be' lubricated, with the outer end of the tubular plunger 2| contacting with the fitting,

and pressure is exerted manually upon the container and, through it, upon the cylinder I2. This causes the enlarged portion of the casing I8 to be telescoped over the tubular plunger 2|, and the solid plunger 23 to move into the bore 22, and

to force lubricant from the bore past the check valve 26. On releasing the pressure exerted upon the container the spring 24 returns the parts to the position shown in the figure, and the vacuum created in the bore 22 draws lubricant into 25 and through the conduit I6, passages I4 and I5,

and chamber 25, to the bore 22. Subsequent reciprccation of the parts causes this lubricant to be forced, out under high pressure, past the check valve 26, into the fitting to be lubricated. As

lubricant is withdrawn from the cylinder I2, the

follower I1 moves inwardly, maintaining constant contact with the lubricant, to prevent air from piercing the lubricant. In withdrawing the empty can, the suction formed thereby insures that the follower is left at the open 'end of the cylinder I2.

In Fig. 2, a casing 3| is formed with a largerV diameter than that of casing I8 of Fig. 1, but has l a similar function; and a spring protecting cacing, formed by an extension 32 thereof, has an inturned portion 33 which cooperates with -the y shoulder or projection 34 on the tubular plunger 2|, to limit the outward movement of the plunger. Secured within the enlarged portion 35, of the casing 3|, is a, small cylinder 36 with a bore 42 having a close/d end 31 and an open end 38. Intermediate said ends, the cylinder 36 is provided with a plurality of transverse openings, such as 38, by means of which lubricant may pass from the outer chamber 4|, formed between the outside wall of the cylinder 36 and the inside walls of the casing 3|, into bore 42. 'Ihe tubular plunger 2| telescopes within the cylinder 36 and cooperates therewith to form a pump, and a' spring 43 is interposed between the outer end of the cylinder 36 and shoulder 34 to automatically return the parts to the normal position shown.

'I'his pump is operated similarly to the one described above. Reciprocation of the plunger 2| owithin the cylinder 36 causes lubricant to be forced into the fitting to be lubricated. The reciprocation is accomplished by pushing upon the container I| and allowing the return thereof by means of the spring 43. After the plunger 2|.

` enters the cylinder 36, lubricant is forced for? ward through the plunger 2| and past the check valve 26 in the outer end thereof. As the tubular plunger 2| withdraws from the cylinder 36, suction is created in the chamber 42 which, when the ports 38 are uncovered, draws lubricant from the cylinder I2 through the conduit I6, the passages I4 and II5, the outer chamber 4|, and the passages 39 into .the chamber 42.

In Fig. 3,' the bottom end of the container |I is provided with a closure 46 in which there are formed a plurality of inwardly extending ridges, such as 41. Secured to the closure I3 is a small cylinder or tube 48 which corresponds, in designr and function, to the cylinder 36 of Fig. 2. However, the cylinder 48 extends inwardly from the closure and has, at its inner end, a plug 45 formed with a central passage-way 5|, normally closed by a check valve comprising a ball 52 and a spring 53. Telescopically mounted in the small cylinder 48 is atubular plunger 54 (which is similar in design and function to the plunger 2| of Fig. 1, but considerably longer), provided at its inner end with a valve, formed by a valve casing 55, threaded onto the inner end of said tubular plunger, a ball 56 within said valve casing, and aspring 51 normally maintaining the ball against its seat. The'plunger 54 and cylinder 48 thus form a high pressure pump. The tubular plunger 54 is provided with a projection or shoulder 58, and interposed between the projection 58 and the outer end of the cylinder 43 is a spring 59 which serves to urge the tubular plunger 54 toward its normal outwardly extended position.

In the operation of the lubricating pump, pressure is applied to the bottom 46, to move the large cylinder I2 and the small cylinder 48 forwardly over the tubular plunger 54; and, thereafter, the container is released. to allow the spring 58 to return the parts to the normal position shown. This reciprocation `of the cylinder 48, relative to the tubular plunger 54, causes lubricant to be drawn in through the spaces between the ridges 41, past the ball check valve 5I, 52, and 53, and into the interior of the cylinder 48, and thence forced past the ball check valve 55-56-51 into the hollow of the tubular plunger 54. Thence, the lubricant is forced from the hollow of the plunger 54 into the ttingl to be lubricated.

In Fig. 5 is shown a container within whichis telescoped a cylinder 6|, provided with a closure 63 having a forwardly extending, cylindrical, reduced portion 64 forming an extension similar to extension 32 of Fig. 2. Extending inwardly from the extension 64, and having itsiinner end adjacent to the bottom of the container is a smaller cylinder or tube 65, formed with lateral ports 66 leading from the interior of the cylinder 6| to the interior of the tube 65. The inner end of the tube 65 is closed by means of a solid plug 61. which contacts with the bottom of container II. Telescopically mounted within the tube 65 is a hollow plunger 54 which extends forwardly through the reduced portion 64 and forwardly therefrom.

Surrounding the tube 65 is a sleeve 68, formed at its bottom end with a plurality of slots, such as 69, through which the lubricant passes when the sleeve approaches the bottom of the containei` II. The sleeve 68 is slidably mounted upon the tube 65 and has, surrounding it and slidably mounted on it, an` annular follower 1| which corresponds in design and function to the follower |1 of the other figures, thus providing means to insure/the withdrawal of substantially all of the lubricant from the container The reduced portion 64 ofthe casing is provided, at its front end, with an inturned portion 12 which coacts with the projection 58, formed onthe plunger 54, to limit the outward movement of the plunger 54, and`the reduced portion 64, itself, forms a protecting casing for the spring 58.

The operation of this form of device differs ner side of the closure 'wardly,

a substantial distance from that previously described only in that, 'as the tubular plunger is reciprocated and moves inwardly of the tube 65, lubricant is trapped in the inner end of the tube 65 and forced outthrough the tubular plunger 54, past a check valve (not shown, but in all respects similar to the valve 55, 56, 51 of Fig. 3) into the fitting to be lubricated. When the tubular plunger 54 moves forwardly, relatively to the tube 65, a vacuum is created in the'inner endvofthe tube 65 which causes the lubricant to be drawn through the passages 66 into the interiorof the tube 65, so as to be forced out through the tubular plunger 54 on the next stroke. As the lubricant is withdrawn ,from the cylinder 6|, the sleeve 68, together with the follower 1|, moves downwardly in the container, maintaining the follower 1| continually in contact with the lubricant, to prevent air from piercing the lubricant. When the sleeve 68 reaches its lowermost position, lubricant is drawn in through the slots 69, and then upwardly between the sleeve and the outside of the tube 65, and then through the ports 66. The follower 1| continues downwardly, along the sleeve 68, until it reaches the bottom of the cylinder 62; and, thus, it is possible (even though the ports 66 are positioned from the bottom of the container) to withdraw substantially all the lubricant from the container. y

In Figs.- 6 to 9, I have shown the closure 16 as formed with a plurality of sockets' 11 for cooperating with lugs 18 provided on the container to detachably secure the container to the closure by bayonet lock.

In the lubricant pump illustrated in Fig. 6,`

a small cylinder or tube 19 is secured to the in- 16 of the assembly, and is provided with an inlet check valve 8| -at the inner end thereof, adjacent to the bottom wall of the container, when in place over the cylinder I2. A conical compression spring 82 is disposed, concentric with and about the tube 19, between the piston |1 and the adjacent wall of the closure 16, to continually urge the piston rearwardly. -The outer end of the plunger 54 .is provided -with a discharge nozzle 83.

f The lubricant pump, illustrated in Fig. 6, opcrates similarly to the pump shown in Fig. 3, except that the spring 8 2 applies a slight positive pressure to the lubricant, inducing its passage through the check valve 8| when the plunger 54 is moved outwardly,` as by the spring 69. The bayonet lock, comprising the parts 11 and 18, adequately serves as a quick detachable means for the container and the remaining parts. of the pump assembly. l

In Fig. 7, I have shown a lubricant pump, having parts similar to .that in Fig. 6, and like reference numerals have been used to designate 'like parts. The pumpl includes an elongated cylinder 85, which is secured to the closure 16 by an externally threaded portion 84, and which extends to the rear end of the cylinder |2. Slots 89 are provided in the rear end wall of the cyl- .inder 85 to admit lubricant from the container thereto. A tubular plunger 2| is slidably disposed within the cylinder 85, with its bore aligned with a stationary plunger 86, secured to the rearward end of the cylinder 85, by means of a spider 88. A compression spring 81 is disposed between the spider 88 and the inner end of the plunger 2|, to urge the plunger outwardly.

The operation of this form of. pump is similar vthat the space within which la bore 92 therethrough,

.outer surface of the plunger 54.

to that described in connection with Fig.'1, except the cylinder 85 is disposed is within the container, thereby providing a compact structure. v

In Fig. 8, I have shown a pump wherein a small. -cylinder or tube 9| is slidably mounted upon the tubular plunger 54, having a spring 96 for urging the plunger outwardly. The tube 9| has a plug, in its rearward end, provided with of relatively small diameter, which is aligned with a conical projection 93 which may be formed in the' end wall of the container or may be welded or otherwise secured thereto. The projection 93 is adapted to be partially received within thebore 92, to prevent .the passage of lubricant from the tube 9| into the container, 'when the tube is thrust rearwardly. Means forassisting the inherent fricwith the tion in causing the tube.9| to move plunger 54 may be used, if desired, and, as shown,

comprises a friction ring 91, of spring steel, which is disposed within a groove formed in the outer wall of the tube 9|, adjacent to its forward end, a portionof the bottom wall of the groove being cut away to permit the spring to contact with the Where 'used with lubricant of `reasonable viscosity, the spring 91 may be dispensed with, if desired, as during return movement the plunger will engage with the shoulderl in the bore ofthe tube 9| to open the valve 92-93, and during the pressure stroke of the plunger 54, the entrapped lubricant, if of reasonable viscosity, will offer enough resistance to passage through, the restricted opening 92, to cause the tube 9| to move with the plunger and thus cause the openingv 92 to be closed by the pro.. jection 93. A follower 64 is slidably mounted upon the tube 9| and performs the same function as the'follower |1, described in connection with the foregoing figures. l

The operation of this pump. is similar to that of the` pump illustrated in Fig. 6, except that, in place of a check-valve 8|, the projection 93 and apertured plug at the end of the tube 9| form a valve which is opened by movement of the plunger 54 through force applied by the spring 96. Such force, when applied, causes a limited movement of thetube 9|, in the direction of travel of the plunger, to separate the plug from the projection and thus permit lubricant to be drawn within the tube 9|. During the rearward or pressure stroke' of the plunger 54, the tube 9| is first moved rearwardly .to cause the mouth of the bore 92 in the plug to be seated upon the projection 93, whereupon continued rearward movement ofthe plunger will result in the discharge of lubricant under relatively high pressure through the nozzle 83.

It may thus be seen that I have provided lubricating pump parts capable of being easily asso-` ciated with a lubricant container in which the lubricant is packed at the factory and in which the lubricant isl transported and stored, and capable of pumping outthe lubricant under relatively high pressure. Provision is made for displaying advertising matter and directions in a visible position on the container which is to be subsequently discarded. 'Ihev pump parts are relatively inexpensive to manufacture and furnish a support for a cheap container. My invention also makes it possible for the operator to disassemble the lubricating gun and reiill it with a minimum of chance of coming in contact with the lubricant.

'Ihe lubricatingdevices or guns" of Figs. 1, 2,

claimed in my co- Nos. 706,591 and 706,593, respectively, both filed on January l5,

It is to be understood that the above described embodiments of my invention are for the purpose of illustration only and various changes may be made therein without departing from the spirit and scope of my invention. f

I claim:

1. A lubricating device comprising,`a container having one end formed with a ridge, a closure for the other end of said container, a cylinder telescoped within said container and secured to said closure, a tube secured to said closure and extending rearwardly therefrom to contact with said ridge whereby spaces are provided on each side of the ridge through which lubricant may be drawn into said tu a follower surrounding said tube and mounted for sliding movement thereon, a check valve at the inner end of said tube, a tubular plunger telescoped within said tube extending forward from the front end thereof; a check valve normally closing the rear end of said tubular plunger, a projection formed on saidtubular plunger in advance of said tube, and a spring interposed between said projection and the forward end of said tube.

2. In a lubricating device, a container, a cylinder telescoped within said container and extending substantially from end to end thereof, a tube positioned in said container and opening at one end to the container, said tube being secured relan tive to said cylinder, a follower surrounding said tube, a spring bearing upon said follower, and a pump associated with said tube. o

3. In a. lubricating device, a lubricant container, a tubular plunger mounted for recprocation in said container, a tube slidably mounted on said plunger, a follower piston surrounding said tube, and means for closing the rearward end of said tube when it is urged rearwardly by said tubular plunger.

4. In a lubricating device, a lubricant container, a tubular plunger mounted for reciprocation in sad container, a tube slidably mounted on said plunger, friction means for causing said tube t'o follow said plunger and means for closing the rearward end of said tube when it is' urged rearwardly by said plunger.

5. In a lubricating device, a lubricant container, a tubular plunger mounted for reciprocation in said container, a tube slidably mounted on said plunger, friction means for causing said tube t follow said plunger, means for closing the rearward end of said tube when it is urged rear wardly by said plunger and a' lubricant follower piston surrounding said tube.

6. In a. lubrcating device, a lubricant container,

.a tubular plunger mounted for reciprocation in said container, a tube slidably mounted on said plunger, a spring for urging said plunger outwardly of said container, friction 'means for causing said tube to 'follow said plunger and means for closing the rearward end of said tube when it is urged rearwardly by said plunger.

7. A lubricating device of the removable and replaceable lubricant cartridge type comprising, in

. combination, a tubular casing having smooth cylindrlcal innerand outer sidewalls, sad casing being open at one end and provided with a fixed end closure at its other end, a high pressure pump secured to said cylinder located within said casing and disposed along the longitudinal axis thereof with its inlet end located adjacent to the open end of said casing, a tubular high pressure pump plunger mounted for reciprocation in said cylinder, said plunger having a discharge end extending through and outwardly of said casing end closure,`a lubricant cartridge having a smooth cylindrical inner side` -wall telescoped over the outer side wall oi said lindrical inner and outer side walls, said casing being open at one end and provided with a. xed end closure at its other end, a high pressure pump cylinder located within said casing and disposed along the longitudinal axis thereofwith its inlet end located adjacent to the open end of said casing, a tubular high pressure pump plunger mounted for reciprocation in said cylinder, said plunger having a discharge end extending through and outwardly of said casing end closure, a lubricant cartridge having a smooth cylindrical inner side wall telescoped over the outer side wall of said casing and infrictional engagement therewith to transfer thelubricant contents thereof into the casing and to provide a closure for the rearward end of the casing, and a follower piston mounted concentric with said pump cylinder and adapted to move rearwardly within the casing as lubricant is withdrawn therefrom into said pump cylinder.

9. In a lubricating device, a quick detachable lubricant container, a cylinder telescoped within said container and in substantial frictional engagement therewith,.said container providing a closure for oneend of said cylinder, a closure member rigidly secured to the other end of said cylinder and providing aclosure therefor, a tube secured to said member and positioned in said container and at one end extending approximately to the closure end of the container, means at said end of said tube to provide communication between said cylinder and tube,and a lubricant f cylinder and providing a closure therefor, a tube member and positioned in said container andA at one end extending approximately to the closure end of the container, means at said end of said tube to provide communication between said cylinder and tube, a lubrcant pump plunger reciprocably mounted in said tube, and means in said tube and on said plunger for limiting movements pf said plunger.

JOHN i.. cnnvmmc.

of said cylinder, aclosure` member. rigdly secured to the other end of said 1

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