US2116005A - Lubricating device - Google Patents

Description

4 Sheets-Sheet l H. R. TEAR ETAL LUBICATING DEVICE Filed Jan. 16, 1936 May 3, 1938.

ATTORNEY V May 3, 1938. H. R. H'EAR ET AL 2,116,005

LUBICATING DEVICE Filed Jan. 16, 1936 4 SheeiiS--Shee'l'I 2 1 i 'ze /Z l a s HIIIIIUI ATTORNEY May 3, 1938. H. TEAR E-r'AL 2,116,005

LUBICATING DEVICE Filed Jan. 16,` i936 4 sheets-sheet 3 TTORNEY May 3, 938. H. R TEARET AL 2,116,005

LUBICAT'ING DEVICE Filed Jan. 16, 1936 4 sheets-sheet 4' INVENTOR .HH/eey e. m92.

BY 2 d ATTORNEY Patented May 3, 1938 UNITED STATES PATENT OFFICE LUBRICATING DEVICE Ware Application January 16, 1936, Serial No. 59,330

18 Claims.

This invention relates to lubricating devices and more particularly to lever attachments for portable hand guns for dispensing lubricant under high pressure.

Lubricant dispensers have been proposed including a rigid barrel or container which may serve as a reservoir for bulk lubricant but which preferably forms a housing for an interchangeable factory filled supply cartridge. A high pressure pump is secured to one end of the barrel and includes relatively telescoping parts, one of which is attached to the barrel and has an inlet stud for sealing engagement with the cartridge outlet and the othervof which carries a discharge nozzle formed for sealing engagement with a lubricant receiving tting. 1n use, lubricant may be forced from the cartridge into the pump by a suitable feed screw, the nozzle may be engaged with a fitting and thrust exerted on the barrel or feed screw toward the fitting to telescope the pump parts and discharge lubricant from the pump into the fitting.

With a dispenser of the type described above, it is possible for an operator to obtain lubricant pressures high enough for most purposes by applying a manual thrust to the barrel or the feed screw. Occasionally, however, conditions arise Where some higher pressure is required as when a so-called frozen bearing is encountered and it is an object of the present invention to provide a lubricant dispenser with which such higher pressures can readily be obtained.

Another object of the invention is to provide a lubricant dispenser including a push type pump and a lever in which the pump may be operated by thrusting it against a tting Without affecting the lever or the lever may be utilized to operate the pump.

Another object is to provide a lever mechanism attachable to and detachable from a dispenser to operate the dispenser pump. The lever mechanism could, if desired, be formed as a permanent part of the dispenser instead of being a separate mechanism.

Other objects, the advantages and novel features of the invention will be apparent from the following detail description when read in connection with the accompanying drawings, in which:

Fig. l is a side view of a hand operated grease gun embodying the invention;

Fig. 2 is a View similar' to Fig. 1 with parts in section and illustrating two operating positions;

Fig. 3 is an end of the `attachment of Figs. 1 and 2;

Fig. 4 is a bottom view of the attachment of Figs. l and 2;

Fig. 5 is a partial section on the line V-V of Fig. l;

Fig. 6 is a side view With parts in section of a modified form of the invention;

Fig. l is an end view of the attachment of Fig. 6;

Fig. 8 is a partial top view of the attachment of Fig. 6 with parts cut away and in section;

Fig. 9 is a side view of still another modified form of the invention;

Fig. 10 is an enlarged partial View similar to Fig. 9 with parts in section;

Fig. 11 is a partial bottom view of Figs. 9 and 10; and

Fig. 12 is an end view of the attachment of Figs. 9 to 11.

Figs. l and 2 illustrate a grease gun including a rigid barrel l which may serve as a reservoir for bulk lubricant but which preferably forms a housing for receiving a factory filled container or cartridge, one end of which is closed by a movable piston or follower. A feed screw 2 having a handle 3 extends through one end of the barrel and may be connected thereto by a quick release device 4 Which can be moved into engagement with the feed screw 2 whereby the feed screw will be threaded into the barrel upon rotation thereof or which can be released from the feed screw to permit free axial movement thereof as is more i'ully disclosed in my copending application Serial Number 753,663. The opposite end of the barrel is closed by a cap 5 screwthreaded thereon, the cap 5 supporting a pump which includes a part 6 secured to the cap 5 and a part l telescoping over the part fi. The part 'l carries a nozzle 8 at its outer end, the nozzle being formed either as a plain Contact type nozzle adapted to sealingly engage a tting upon being placed thereagainst or of the clamp coupling type which is adapted to securely clamp on a fitting.

The grease gun as so far described may be operated by turning the feed screw 2 to force lubri- 45 cant from the barrel l or from a cartridge contained therein into the pump. The nozzle 8 may be placed against a fitting and thrust eX- erted on the handle 3 or on the barrel l to telescope the pump parts 6 and l thereby to dis- 50 charge lubricant from the pump into the tting under a relatively high pressure.

The pressure developed by manually thrusting on the handle 3 toward a fitting is suicient for most lubricating operations, but occasionally a pressure is desired which is higher than that capable oi being developed readily by merely thrusting on the handle 3, such, for example, as to force lubricant into a clogged up or so-called frozen bearing. In order to develop such higher pressures there is provided, according to the present invention, a lever attachment which may be secured to the grease gun described in order to enable an operator to develop pressures greatly in excess of those which can be produced readily by thrusting the gun toward a fitting. As shown, the lever attachment comprises a collar S tting the barrel I and adapted to be held thereon by engagement with the cap 5. The collar is provided with two projecting lugs or ears II and I2, to one of which a plate I3 is secured as by means of a bolt III. The plate I3 has an opening therein through which the pump part 6 extends and may be connected to the other lug er ear as by means of an enlarged head I2 interlocking with a keyhole i3 in the plate I3, and serves to hold the collar 9 tightly against the cap 5.

A portion of the plate I3 extends axially outward of the lug I I and is turned over at its outer end to provi-de a support for a pivot pin I5. A lever in the form of a U-shaped member having arms IIS and a cross-member I'I is pivoted intermediate its ends on the pin I and has the ends of the arms I5 pivotally connected to the ends of a yoke I8 which is mounted on the pump member The yoke I8 may be held in place on the pump member by means oi a collar IIBV which prevents the yoke from sliding over the end of the pump member. A second lever 2| is pivoted at one end on the pin I5 and is formed at its opposite end with a handle portion lying in one position closely adjacent and substantially parallel to the barrel I.

The lever 2i is adapted to engage the cross piece I'i when it is swung about its pivot in a direction away from the barrel and toward the pump, to swing the lever IES about its pivot and draw the yoke i8 and the pump part 'I toward the barrel. The lever 2i preferably carries a spring detent 22 engageable with a xed member 23 on the collar 8 yieldingly to hold the lever 2I in the position shown in full lines in Figs. l and 2. A latch 24 is preferably pivoted on the lever 2I in a position to engage the cross member II and may, if desired, be urged into engaging position by a suitable spring, not shown, thereby to lock the levers I6 and 2| together rigidly. The latch 24 has a cam portion 24 adapted to engage the lug II to move the latch into its disengaged position when the lever 2I is moved toward its ull line position of Figs. l and 2.

One of the advantages of utilizing interchangeable lubricant cartridges with a dispensing device of this character is that cartridges containing different grades of lubricant may readily be substituted for one another to provide the correct grade of lubricant for each part of a machine being serviced. It is desirable during an interchange of cartridges for this purpose to retain as little as possible of the old lubricant in the pump when the cartridges are changed in order to minimize intermingling of the lubricants and to enable the new lubricant to be dispensed on at least the second pump operation after the change has been made. Accordingly, the invention includes means for locking the pump parts` in their `discharge position Vin which the minimum quantity of lubricant is contained in the pump so that While in this position cartridges may be interchanged without requiring an extensive flushing operation to remove the old lubricant and without producing any appreciable intermingling of lubricants.

As shown, such means is constituted by a latch 25 pivoted on the lever 2I and controlled by a finger 28 having a thumb piece projecting through a slot in the lever. The latch 25 normally occupies the full line position shown` in Fig. 2 but when it is desired to lock the pump parts in their discharge position, the finger 26 may be operated to swing the latch 25 into its dotted line position shown in Fig. 2 in which the end thereoi engages the bolt I4 and holds the pump parts in their discharge position.

If it is desired to operate the grease gun of Figs. 1 and 2 as a push type gun, the lever 2I may be moved to a position shown in Fig. l, the latch 24 being released by engagement of the cam portion 24 with the lug I I during this movement, after which the gun may be operated Without affecting the lever 2l. During operation of the pump by thrusting it against a fitting the yoke I8 will move with the pump parts 'I causing the lever I6 to swing about its pivot but since there is at this time no connection between the levers I6 and 2l, the latter will not be affected. In order to utilize the lever to produce higher pressures than those possible merely by thrusting the gun against a tting, the lever 2l may be swung about its pivot into engagement with the cross-member I'I, the latch 24 being moved into latching position with Vthe cross member I'i by the spring thereon. In this position the lever EE and 2I are rigidly connected and movement of the lever 2! in a clockwise direction about its pivot will cause the lever I6 to move similarly, thereby drawing the yoke I8 and pump parts I toward the barrel I and producing a discharge of lubricant from the pump. It will be noted that a considerable mechanical advantage is obtained between the handle of lever 2I and the yoke I8, the amount of leverage obtained being variable to Substantially any desired value by properly proportioning the lengths of levers I6 and 2|.

If it is desired to change a cartridge in the barrel I, the lever 2I may first be moved into the dotted line position of Fig. 2 and the finger 26 operated to swing the end of latch 25 into enga-gement with the screw I4. The barrel I may then be removed from the cap 5 and a new cartridge substituted, the pump parts being held in their discharge position during this operation by the latch 25.

It will be noted that thrust exerted on the lever 2| to operate the pump during a discharge stroke is in the general direction of the nozzle 8 and acts both to hold the nozzle on a tting and to urge the barrel I toward the tting and nozzle to apply an additional operating force on the pump. This arrangement is particularly advantageous where a plain push type nozzle is employed which is held on a tting by being thrust thereagainst, since the same force which operates the pump serves also to hold the nozzle on the fitting and insures that the nozzle will be held on the fitting during discharge of lubricant.

The collar 9 is preferably freely rotatable on the barrel I and the yoke I8 is rotatable on the pump part 'I so that the entire lever attachment may be rotated freely around the grease gun to any desired position. It it is desired to lock the attachment against rotation this might be accomplished by providing the plate I3 with a noncircular hole to fit a non-circular projection on the front of the cap or a suitable set screw might be provided in the collar 9 or both.

Figs. 6 to 8 illustrate a modified form of lever attachment which is adapted to be used on a grease gun identical with that shown in Figs. 1 and 2 and for the purpose of brevity of description, the grease gun parts in Figs. 3 to 5 have been given the same reference numbers as corresponding grease gun, parts in Figs 1 and 2. The lever attachment of Figs.. 3 to 5 includes responding grease gun parts in Figs. 1 and 2. which is provided with projecting lugs 32 and 33 and has a plate 34 secured thereto and adapted to engage the front of the kcap 5. The lug 32 carries a pivot pin- 35 on which the free ends of a U-shaped lever 36 are pivoted. The lever 36 is pivotally connected intermediate its ends to a yoke 31 which engages the pump parts 1 and which is held thereon by means of a collar 38.

A second lever 39 having a right angle extension il is pivoted at one end on the pin 35 so that the extension 4| will lie closely adjacent to the barrel I. The lever 39 carries a pair of latches 42 and 43, the latch 42 being pivoted intermediate its ends on a pin 44 and being formed at one end with a notched portion 45 adapted to engage the lever 36. The opposite end of the latch 42 is formed with a taper to be engaged by an operating member as will be described later. The latch 43 is pivoted on the pin 44 at one end and includes a relatively flat portion 46 which is adapted to be moved into engagement with the end of the cap 5 or of the collar 3l. As shown, lthe collar 3| is cut away adjacent the latch 43 so that the portion 46 thereof may move into the cut away portion of the collar to engage the end of the cap 5. Suitable springs 41 are preferably provided for urging the latch 42 into position to engage the lever 36 and for urging the latch 43 away from the cap 5.

In order to control operation of the latches a linger 48 is slidably mounted on a pin 49 on the extension 4I and has a thumb piece projecting through a slot in the extension 4I by which the finger 48 may be moved. The forward end of the finger 48 is bent upwardly as shown at 5I to form a cam surface engageable with the tapered end of the latch 42 and with the free end of the latch 43.

In the position shown in Fig. 6, the extension 4| is held closely adjacent to the barrel I by engagement of the latch 43 with the cap 5 and the gun may be operated by placing the nozzle 8 against a iitting and exerting a thrust on the handle 3. It will be noted that during this operation the lever 36 swings freely about its pivot but that the lever 39 and its extension 4| will not be aiected. To utilize the lever 4|, the nger 46 is moved rearwardly out of engagement with both of the latches 42 and 43. 'Ihe springs 41 will then urge the latch 43 out of engagement with the cap 5 and will urge the latch 42 into position for engagement with the lever 36. Pivotal movement of the lever 4I away from the barrel I will move the latch 42 into locking engagement with the lever 36 to lock levers 36 and 4| together. Thereafter pivotal movement of the lever 4I will cause a corresponding pivotal movement of the lever 36, thereby moving the pump parts 1 toward the barrel I and discharging lubricant from the pump.

If it is desired to lock the pump parts in their discharge position during interchange of lubricant cartridges, the linger 48 may be moved to an intermediate position in which it engages the latch 43 but is disengaged from the latch 42. In this position the latch 42 will engage the lever 36,-locking levers 36 and 4| together, and the latch 43 will engage the cap 5 to hold the lever 36 and the pump parts in the discharge position.

It will be noted that, to effect a discharge stroke of the pump, the lever extension 4I will'be moved toward the barrel I. An operator may grasp the lever 4I in one hand and the barrel I in the other hand and perform this operation very easily in the same manner as using a pair of scissorsror shears. Y

Figs. 9 to 12 show a further modification of the lever attachment adapted to be used on a grease gun of the same type as that illustrated in Figs. 1 to 8 and for the purpose of brevity of description the same reference numbers have been used on the gun parts as in the preceding figures. The lever attachment of Figs. 9 to 12 comprises a plate 55 having an opening therein to surround the pump parts 6 and 1 and formed with an extension 56 adapted to hook behind the cap 5. A pair of lugs 51 extend inwardly from the plate 55 to seat on the head of the cap 5 to hold the plate 55 in a position substantially parallel to the cap 5.

In order to hold the plate 55 on the cap 5, an angular member 58 having a hook portion 59 adapted to engage the rear edge of the cap 5 is secured to the plate 55 by means of a bolt 6I extending through the plate and the angular member and carrying a nut 62. It will be noted that the nut 62 engages one leg o1" the angular member 5B intermediate its ends so that when the nut is tightened it tends both to pull the plate toward the cap 5 and to urge the members 56 and 58 together to grip the cap 5 rmly between them.

The plate 55 is formed with a pair of integral ears 63 supporting a pivot pin 54. links 65 are pivoted at one end on the pin 64 and at their opposite ends are pivotally connected to a lever 66, a suitable coil spring 61 preferably being provided to urge the lever 65 intov the full line position shown in Figs. 9 and l0. One end 68 of the lever 66 is formed with a hand grip portion to be engaged by the hand of an operator and the opposite end is bifurcated to straddle the pump part 1.

In order to connect the lever 66 to the pump,

a yoke having slotted side arms '3| and an end cross member 12 is provided. 'The member 12 has an opening therein to receive the nozzle 8 and the free ends of the side arms 1| are secured to a ring 13 which is adapted to receive the pump member 1. The yoke is placed on the pump member 1 as indicated in Figs. 9 to 11 with the cross member 12 engaging the end of the pump member 1 and the ring i3 surrounding the member 1 to prevent tilting of the yoke thereon, a collar 14 preferably being provided on the nozzle 8 to hold the yoke in place. The lever 66 is connected to the yoke by means oi pins or the like 15 carried by the bifurcated ends of the lever and slidable in the slots in the yoke arms 1I.

The spring 61 normally serves to hold the lever 66 in a position parallel and closely adjacent to the barrel I, the pump being operable in this position by thrusting the nozzle 8 against a fitting such as that indicated at 16 in Fig. 10 and exerting force on the barrel l or handle 3 to telescope the pump parts 6 and 1. During such telescoping movement the pins 15 will slide freely inthe slots in arms 1I so that the lever will not be affected. To utilize the lever for operating the A pair of pump an operator may grasp the lever end 68 and urge it in a direction away from Vthe barrel I and generally toward the nozzle and fitting. This movement causes the opposite end of the lever `to move toward the barrel I, thereby moving the pins 'l5 to the ends of the slots in arms 'll and thereafter moving the yoke-and pump part 1 toward the barrel to cause a pump discharge. It will -be noted that thrust exerted on the lever 66 to cause a pump discharge is in the direction -of thenozzle and the tting and tends tohold the nozzle on the tting and in this respect the attachment of Figs. 9 to 12 is similar to that of Figs. l to 5.

While several embodiments of the invention have been shown and described, it will be apparent that many changes might be made therein and it is not intended to be limited to the forms shown or otherwise than by the terms of the appended claims.

We claim:

l. A lubricating device comprising, means forming a high pressure pump, a discharge nozzle for -said pump, said pump being operable by applying a thrust on said discharge nozzle, a lever pivoted adjacent said pump, and a connection between said pump and said lever so constructed and arranged that the pump may be operated without affecting the lever or the-lever may be operated to apply an additional operating force to the pump.

2. A lubricating device comprising a barrel, means forming a high pressure pump including Aaxially movable parts, one of which is secured to the barrel, a discharge nozzle connected to the other oi said parts, said pump being operable by applying a thrust on said discharge nozzle, a lever pivoted on the barrel, and a releasable latch connection between the pump and lever, whereby the pump and lever may be connected or disconnected at will.

3. A lubricating device comprising, a barrel, a pump secured to said barrel, said pump including relatively telescoping parts one of which isrigidly secured to the barrel, a discharge nozzle secured to the other of said pump parts, a lever pivotally carried by said barrel, a yoke engaging said other pump part, and a lost motion connection between said yoke and said lever whereby the pump may be operated without moving the lever but movement of the lever will operate the pump.

4. A lubricating device comprising, a barrel, a pump connected to said barrel, said pump including relatively telescoping parts, a discharge nozzle connected to one of said parts, a yoke rotatably connectedto said one pump part, a supporting member rotatably carried by said barrel, and a lever pivoted on said supporting member and connected to said yoke to operate the pump.

5. A lubricating device comprising a barrel, a pump secured to said barrel in alinement therewith, said pump including relatively telescoping parts the outermost one of which is movable toward and away from the barrel to operate the pump, a discharge nozzle carried by said part, and a lever pivotally carried by said barrel and connected to said part and having one end thereof extending laterally from the device and movable toward said part to move the end part toward'the barrel.

6. A lubricating device comprising, a barrel, a pump secured to said barrel in alinement therei with, said pump including relatively telescoping parts ythe-outermost one of which is movable toward and away from the barrel to operate the pump, a yoke rotatably mounted on said end part.

a supporting member rotatably mounted on the barrel, and a lever pivoted on said supporting member and connected to the yoke and having one end extending laterally from the device and movable about its pivot to move said end part.

7. A lubricating device comprising, a barrel, a pump secured to said barrel in alinement therewith, said pump including relatively telescoping parts-the outermost one of which is movable toward and away from the barrel to operate the pump, a lever connected to said end part, and a second lever having means for connecting it to the first named lever to operate the pump.

8. A lubricating device comprising, a barrel, a pump secured to said barrel in alinement therewith, said pump including relatively telescoping .parts the outermost one of which is movable toward and away from the barrel to operate the pump, a lever pivoted on said barrel and connected to said end part, and a second lever pivoted onthe barrel and having means for connecting it to the first named lever to operate the pump.

9. A lubricating device comprising, a rigid barrel, a pump secured to said barrel in alinement therewith, a lever pivoted on said barrel and connected to the pump to operate the same, a second lever pivoted on said barrel, and a latch on said second lever engageable with or disengageable from said rst lever to operate the pump.

l0. A lubricating device comprising, a rigid barrel, a pump secured to said barrel in alinement therewith, a lever pivoted on said barrel and connected to the pump to operate the same, alsecond lever pivoted on said barrel, and a pair of latches on said second lever, one of which is engageable with the rst lever and the other of which is engageable with the barrel.

l1. A lubricating device comprising, a rigid barrel, a pump secured to saidbarrel in alinement therewith, a lever pivoted on said barrel and connected to the pump to operate the same, a second lever pivoted on said barrel, a pair of latches on said second lever, one of which is engageable with the rst lever and the other of which is engageable with the barrel, and operating means for said latches for selectively engaging either of said latches or for simultaneously engaging both of them.

12. A lubricating device comprising, a rigid barrel, a pump secured to said barrel in alinement therewith, a lever pivoted on said barrel, a yoke engaging a pump part and pivoted to said lever, a second lever pivoted on said barrel coaxially with said first named lever, a latch on said second lever engageable with said first lever, asecond latch on said second lever engageable with said barrel, and operating means for said latches so constructed and arranged as to operate either of the latches selectively or to operate both of the latches simultaneously.

13. A lubricating device comprising, a rigid barrel, a pump secured to the barrel in alinement therewith, said pump including relatively telescoping parts, the end one of which is movable toward and away from the barrel to operate the pump, a yoke rotatably mounted on said end part, a supporting member rotatably mounted on said barrel, a lever pivoted on said supporting member and connected to said yoke, a second lever pivoted on said supporting member, and a latch-on said second lever engageable with said rst lever and disengageable therefrom at will.

14A lubricating device comprising, a rigid barrel, a pump secured to said barrel and including relatively telescoping parts, the outermost one of which is movable toward the barrel to produce a discharge stroke of the pump, a yoke engaging said outermost part, a lever pivotally supported by the barrel and connected to said yoke, a second lever pivotally supported on the barrel and engageable With the iirst lever to urge the pump toward its discharge position when the free end of the second lever is moved toward the pump, and a latch carried by the second lever for holding the pump in its discharge position.

15. A lubricating device comprising, a rigid barrel, a pump secured to said barrel and including relatively telescoping parts, the outermost one of Which is movable toward the barrel to produce a discharge stroke of the pump, a yoke engaging said outermost part, a lever pivotally supported by the barrel and connected to said yoke, a second lever pivotally supported on the barrel and engageable with the rst lever to urge the pump toward its discharge position when the free end of the second lever is moved toward the barrel, and a latch for holding the second lever in a position adjacent the barrel with the pump in its discharge position.

16. A lever attachment for a lubricant dispensing device including a barrel and a pump having relatively telescoping parts alined with the barrel comprising, a supporting member adapted to be secured to said barrel, a yoke engageable with the outermost pump part, and lever means connecting said member and yoke and operable to move said yoke and outermost pump part relatively toward and away from the member and barrel, thereby to move said pump part and to operate the pump.

17. A lever attachment for a lubricant dispensing device including a barrel and a pump having relatively telescoping parts alined with the barrel comprising, a supporting member adapted to be secured to said barrel, a yoke engageable with the outermost pump part, a lever pivotally connected to said member and yoke, a second lever pivoted cn said supporting member, and means for connecting said levers whereby operation of the second lever moves the rst lever and operates the pump.

18. A lubricating device comprising, a rigid barrel, a pump secured to said barrel and including relatively telescoping parts, the one of Which most remote from the barrel being movable toward the barrel to produce a discharge stroke of the pump, a yoke engaging said one part, a rigid lever having a pin and slot connec tion at one end with said yoke, and a link pivoted at one end to said barrel and at its opposite end to said lever.

HARRY R. TEAR. OTTO B. CLARK.

CERTIFICATE CF CORRECTION. Patent No., 2,116,005. -May 5, igzp HARRY R. TEAR, ET AL.

It is hereby` certified that error appears in the printed speciication of the above ynumbered patent requiring correction as follows; Page 5, first column,l line 1l, strike out "responding grease gun parts in and insert instead the wordsa collar 5l similar to the collar 9 of; and that the said Letters Patent should be read with this 'oorreotion therein that the same may conform to the reord of lthe cause in the Patent 4Office.

l signed and sealedthis 28th day of June, A. D. 1958.

Henry van Arsdale I (Seal) Acting Commissioner of' Patents.

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