Патент USA US2118367код для вставки
May 24, 1938. H. R. TEAR ’ ` 2,118,367 LU'BRICATING DEVICE Filed Aug. l2, 1956 .No n [Hummm-f "Iì ‘n 1| . , Iull-l Egg! . L-- "n, .q \ " s Ali INVENTOR. N »WRYR 72W? ATTORNEYS. 2,118,367 Patented May 24, 1938 PATENT oFFicE UNITED >STATES 2,118,367 LUBRICATING DEVICE Harry R. Tear, Evanston, Ill., Vassigner to The Lubrication Corporation, Chicago, Ill., a cor poration of Delaware Application August 12, 1936, Serial No. 95,499 (ci. azi-47.4) 5 Claims. This invention relates Vto lubricating devices and more particularly to factory filled lubricant supply cartridges and tol dispensers utilizing such cartridges. , Lubricants of various types have, for some time, been marketed in factory filled cartridges and the advantages and desirability `of this method of handling lubricants are: now too well known to require furtherdiscussion. One of the desirable 10 features of cartridged lubricant is that the cus tomer receives assurance that he is actually re ceiving the brand of lubricant which he desires since the manufacturer’s label may be placed on Y the cartridge at the time it' is ñlled. There 15 might, however, be a tendency on the part of unscrupulous persons to take advantage of the advertising and prestige »of other better known manufacturers by obtaining used or empty car tridges bearing the labels of such manufacturers 20 and refilling such cartridges with their own in ferior lubricant. This practice would be very unfair to the original manufacturer and also to the customer, since the latter would be deceived into accepting an inferior product. 25 Such unfair practice can be eliminated if the cartridges can be so constructed that refilling after once using is impossible, and it is accord ingly one of the objects of th-e present invention to provide a. lubricant cartridge `which cannot 3O be refilled. = Another object of the invention is to provide a lubricant cartridge including a piston having an opening therein which is normally closed during original use of the cartridge but which will be 35 opened upon any attempt toi move the'p-iston rearwardly, as would be necessary to refill the cartridge. ` Another object is to provide a piston for a lu bricant cartridge having a normally closed open 40 ing which will remain closed against a force in one direction but which will be opened by a force in the other direction. ' Still another object is to provide a lubricant ,_ dispenser including a feed screw and a cartridge having a movable piston with a normally closed opening in which the feed screw force tends to hold the opening closed but a force in the oppo site direction tends to open it. . Other obiects, advantages and desirable par ticular constructions will be apparent from the following description when read in connection with the accompanying drawing, in which: Fig. 1 is a. side view of a lubricant dispenser 55 embodying the invention with parts in section. ¿Fig 2 is a partial central section similar to Fig. 1 showing a diñerent position; Fig. 3 is a central section of a modified con struction embodying the invention; Eig. 4 is an enlarged partial View of the con- 5 struction of Fig. 3; and Fig. 5 is-a View similar to Fig. 3 of a further modified construction. The' dispenser illustrated in Fig. 1 comprises! a cylindrical barrel or housing which is closed at 10 one end by a permanently attached cap 2 through which va feed screw 3 extends. The feed screw 3 is preferably connected to the cap by means of a quick rel-ease device 4 which may bei operated to release the feed screw for fre-e axial movement l5 or which may be threadedly connected to the feed screw. A suitable operating handle 5 is se cured> to the outer end of the feed screw and the inner end thereof carries a cup member 6 for engagement with'a cartridge piston. 2o The opposite end ofthe barrel I is closed by means of a detachable head 'I which carries a lubricant pump formed by a member 8 extending loosely through the head 1 and having an inlet stud 9 and a member Il slidably mounted on the 25 member 8¿ and carrying a Ynozzle I2 of any suit able type. The pump part 8 is rigidly secured to a connector plate i3 which lies inside of the head 'I and which is formed around its periphery with a plurality of notches and cam portions for form- 30 ing a bayonet joint with a lubricant cartridge. The barrel I is adapted to- receive an inter changeable factory filled lubricant cartridge hav ing a cylindrical side wall I4 and a ñxed end closure >l5 formed with a' central outlet opening 35 defined by a spherical wall portion I6 adapted for sealing engagement with the inlet stud 9. The forward end of the cartridge side wall has a plurality of depressed lugs I1 by which the car tridge may be connected rigidly to the connector 40 plate I3. The opposite end of the cartridge is closed by a slidably mounted piston I8 having a central opening therein deñned by an outwardly turned flange I9. The opening may be closed by a cap 2l frictionally fitting over the flange I 9 45 and having a reduced portion 22 adapted to- ñt into the cup» member 6. To operate the dispenser of Fig. 1, the parts are iirst assembled as indicated and the feed screw 5 may then be turned into the barrel to 50 bring the cup member 5 into engagement with the cap 2l. Further turning of the feed screw will create a pressure on the piston I8 forcing lubri cant from the cartridge into the pump part 8. Thereafter the nozzle I2 may be placed against 55 2 2,118,367 I9 will be closed and there will be no tendency ed over the edge ofthe flange and a cap member 36 is adapted to fit over the sheet and the fiange to reinforce the sheet during normal operation. The cap member is preferably provided with an annular upwardly turned projection 31 of a size to fit within the cup member 6, thereby to assure centering of the cup member 6 on the piston. The piston of Fig. 5 operates in substantially the for the cap 2| to be removed. same manner as those previously described, it be a fitting and a thrust exerted on the handle 5 or barrel I in the direction of the nozzle to telescope the pump parts and thereby to eject lubricant from the pump. It will be noted that during Ul operation of the feed screw the thrust exerted thereby tends to force the cap 2I tightly against the piston so that the opening through the ñange ing noted that during normal operation the cap 10 cartridgeI parts when the contents thereof have> 35 reinforces the sheet 35 but that any attempt been almost entirely discharged and the piston to force the piston rearwardly in a cartridge will I8 has moved to a position closely adjacent the result in displacement of the cap 36 and ruptur end closure I5. It will be appreciated that when ing of the sheet 35. the cartridge is completely emptied the piston I8 While several embodiments of the invention have been shown and described, it will be ap will lie in contact with the end closure substan parent that many changes might be made therein tially throughout their entire areas so that prac tically all of the contents of the cartridge will be and it is accordingly not intended to be limited to dispensed. In order to refill the cartridge it the forms shown or otherwise than by the terms of the appended claims. 20 would be necessary to force the piston I8 away 20 ` I claim: ` from the closure I5 to its original position either 1. A lubricant supply cartridge comprising, a by inserting a toolthrough the outlet opening to force the piston back mechanically or by forcing cylindrical wall portion having a ñxed closure Fig. 2 illustrates the relative positions of the lubricant or other fluid under pressure into the It will be noted from the rela provided with an outlet opening at one end de fined by a flange extending into the cartridge, a 25 tive positions of the parts in Fig. 2 that any tool inserted through the' outlet opening in the wall I5 would necessarily engage the cap member 2l piston slidably mounted in the cartridge and forming a movable closure for its opposite end, said piston having an opening therein in register with said outlet opening, and defined by a rear 25 outlet opening. and a thrust exerted on such tool would cause the cap member to slide off of the flange I9 thereby leaving an uncovered hole in the piston. The cap member 2l would be removed similarly if it were attempted to force the piston back by means of fluid pressure and it will be apparent that with the cap member removed it is sub stantially impossible to force the piston back cap through the outlet opening will remove the the manufacturer. ~ Figs. 3 and 4 illustrate a modified piston con struction which might be substituted for the piston i8 of Figs. 1 >and 2 comprising a body por 45 tion 24 having a circular periphery adapted to cap from the piston. 2. A lubricant supply cartridge comprising, a cylindrical wall portion having a fixed closure provided with an outlet opening at one end, a pis 40 ton slidably mounted in the cartridge and forming a movable closure for its' opposite end, said piston having an opening therein in register with said outlet opening, a frangible sheet secured over said opening in the piston to close it, and a rela 45 seal against the inner wall of the cylindrical tively flat reinforcing member overlying said cartridge body and formed at its central portion sheet whereby a thrust on the reinforcing mem ber in the direction of the outlet opening will cause it to reinforce the sheet and to force the with an outwardly extending flange 25 connected to a similar flange 26 of reduced diameter. The end of the flange 25 is open to provide a hole through the piston and may be closed by means of a sheet 2'! of frangible material such as paper, metal foil or the like which is cemented to the flange 25 as indicated at 28. A cap 29 is formed 55 to fit over the flange 26 and down turned edges of the sheet 2l' and has a radial flange 3| to provide a seat for the edges of the 'cup member 6. The central portion of the cap 29 is substantially fiat and overlies the sheet 21 to provide a reinforce 60 ment therefor against lubricant pressure in the cartridge. However, if it were attempted to move the piston rearwardly by means of a tool inserted through the cartridge outlet opening or by fluid pressure applied to the cartridge outlet opening, 65 the sheet 2'! would be ruptured and the cap 29 piston through the cartridge and a tool inserted 50 through the outlet opening will rupture the sheet and force said member away from the piston. 3. A lubricant supply cartridge comprising, a cylindrical wall portion having a fixed closure provided with an voutlet opening at one end, a 55 piston slidably mounted in the cartridge and forming a movable closure for its opposite end, said piston having an opening therein in register with said outlet opening, a frangible sheet se cured over said opening in the piston to close it, 60 and a cap frictionally secured to the piston and having a relatively flat surface overlying the sheet to reinforce it, said sheet Yadapted to be ruptured and said cap adapted to be removed by a force exerted thereon through the outlet 65 would be forced off of the flange 26 thereby sub opening. stantially destroying the utility of the piston and 4. A lubricant supply cartridge comprising, a cylindrical wall portion having a fixed closure provided with an outlet opening at one end, a piston slidably mounted in the cartridge and 70 forming a movable closure for its opposite end, Said piston having an opening therein in regis ter with said outlet opening, and defined by a rearwardly extending circular flange, a frangible sheet secured over the edge of said flange to close 75 making it substantially impossible to refill a cartridge successfully. Fig. 5 illustrates a further modified piston con struction including a body portion 32 having a central opening defined by an outwardly turned central flange 33, the edges of which are rolled in as indicated at 34 to provide a smooth sur 75 over said first named flange, and a cap frictional ly fitting over the outside of said last named flange whereby 'a force exerted on the cap in the di rection of the outlet opening will urge the piston through the cartridge but a force exerted on the 35 wardly in the cartridge. Thus this construction makes refilling of the cartridge a substantial im possibility and insures that the contents of the 40 cartridge are those originally placed therein by 70 wardly extending circular flange adapted to fit face. A sheet of frangible material 35 is cement 2,118,367 the opening, and a cap frictionally fitting over said ñange and having a relatively flat surface overlying the sheet to reinforce it. 5. In a lubricant cartridge, a piston compris~ 5 ing, a circular body formed around its periphery for sealing engagement with the cartridge side Wall, said body having a central opening deñned A ~ 3 by an outwardly turned flange, a frangible sheet secured to the edge of the flange and closing the opening, and a cap frictionally ñtting over the flange and having a relatively ñat surface over lying and reinforcing said sheet. HARRY R. TEAR.