US1275455A

US1275455A - Grease-gun.

Info

Publication number: US1275455A
Application number: US20962517A
Authority: US
Inventors: Jonn G Macgregor
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-12-31
Filing date: 1917-12-31
Publication date: 1918-08-13
Anticipated expiration: 1935-08-13

Description

1. e. Manson GREASE GUN. APPLICATION FILED, DEC- l9ll- 1,275,455. I PatenmdAug.13,l918.

UNITED STATES PATENT OFFICE.

roan: c. imagines- 2931:, is. i.

Toallwhom itma concern:

Be it'knownt at JOHN G. MAcGnneon, aicitizenxof the United (States, and resident of thecity, county, and State ofNew York," hasginvented -certain' new 'anduseful Imrovem'ents in Grease-Guns, of which. the 'ollowing is 51a specification. This "invention relates-to that class of device'swhich are commonlvk'nown as grease and which comprise a receptacle adapted to hldgrea'se, or other material of a. "asty." or" semisolid nature, and are pro- M p} vi' edwithejecting means'wherebv the n aterial may be forced irom the receptacle as desired;

ious novel features of the invention particularl eintedpout.

e. accompanying drawings, in which (its pref r d emb i e t is aerial sectional'view of a bodymg he inve horizontal section on the line l is a detailfaceviewof one foi-the e e; 1 a ahorizontal *sectionon the line 1-. V i It'fis to he understood {that in describing myjdevice as a grease gun throughout the specification and claims', I employ this term frconvenience innoinen lature and not in anywayginalimitingsensei Ashere shown, improved grease gun c6m'p'rises a cylindr cal receptacle 2 whose rear end is closed by af fixed non-removable head 3 secured' thereto in any suitable man ner asdindicatedat 4. I I "I he forward, fo r discharge, end thereceptacle is closed. by a relatively rotata ble'cap fi'jto which is secured a barrel 7 which [freely inclcses the forward, end of thegun.

Application 119a December, 1017. s rial m. scam.

.the head 8.

ently referred to, and 0 6 rotatably ngs, and,to theappended ,c imsin which I Specification ot Lettcrl Ila-tent. I Patented All g- 13, 1.918,v

I sleeve-washer 8,, of paper or like material, is preferably inter osed between-tho barrel 7 andthe-Wall oft e receptacle.

The cap*6 is provided with a discharge nozzle \9, which maybe screwed upon the neck 10 of the cap'6.

Extending axially through the receptacle from endltofend thereof is a helix 12 which is fixed at ene'l end to the cap 6 and at its oppositeend has a mp ian nesp nsm "way "a: some; this helix and *seeum g it n.rnplecelpreferably construct itof (a .pair of w1res twisted together, and separated adjacent the forwa'r end of the h gun into the oppositely pointing horizonal portions 13 whose ends projectthroughsuitable lat- Swivel connection with eral openings in the neck 10 ai1d mfayl-he secured in place by soldering or otherwise. This helix Serves the purpose both of ad-v vancin'g the follower or securing the cap "on the forward en' d of the cylt ter function is accomplished inder.

ening in the heads and s01- a washer 15. The'jpistoir" the disk 19 is'cut out-on o POSltBYSIdBS to;

form shoulders21 and we ge surfaces 22, shown in Fig-.4, whosepurlpose is'toprevent rotation and, consequent end "of the helix friely' or follower ishere shown as comprising a nut 17 threaded-on thehelix; 12 and having-on one side a square boss 18 a 5 vancement ,of the piston when the=hel1x is piston, tdbef presrotated in one directionw and prevent retrac- 7 tion of thexpiston when'the helix is rotated in an opposite direction; Formed on the ribs 20" are a series of-inwardly pointing projections 23. These pro'ections assist in preventing the retraction o the piston when" the wedge surfaces 22 are broughtiinto en-' gagement with the ribs 20 beneath oneof, the projections 23. The cut-out port ons of I i the disk'19 at the points ajacent the-shoulders 21 clears 'these projections 23, when the ribs 20, as shownin Fig.4, on the upper side'of the metall c disk 19 forming apart of the piston, s a secon the shoulders 21 are in engagement with i v I disk 2'5,1wh'1ch may be made of 'paperor',

other'like material, having a central open.

ing 26 through which the helix passes freely and peripheral notches 27 to accommodate the ribs 20, as shown in F ig'. 3.

The manner of using my improved grease on is as follows: The receptacle 2 may be filled by removing the nozzle 9 or after the cap 6 has been slipped on the forward end, with the helix 12 projecting through the rece tacle, but before the piston is placed on t e'hclix or the head 3 secured in place. In the latter case, after filling, the piston is. placed on the helix, the disks '25 and placed on the end of the helix and the nut 17 then drawn into position by rotating the helix throu h the medium of the cap 6 and barrel 7. he head 3 is then fixed in place and the washer 15 soldered on the projecting end of the helix.

To discl'iarge the material, the helix 12 is rotated (by rotating the barrel 7 relatively to the cylindrical receptacle'2) and 'the piston is moved forwardly on the helix,

causing the contents of the gun to be grad-- ually ejected through the nozzle 9. It will be apparent that the rotation of the piston with the helix will be prevented by the engagement of the shoulders 21 on the disk 19 with the ribs 20 on the receptacle. If it is attempted to rotate the helix in an opposite direction, either after the-con tents have been discharged or at any intermediate point the wedge surface 22 on. the

disk 19 willbe moved into engagement with ribs-2Q and movement of the piston rearwardly willbe prevented by the w'edging action and also by engagement ofthe latter with the rejections 23 on the ribs. It will thus be 0 vious that refilling of the receptacle will be impossible without rupturing somepart thereof and also that operation of the piston in the .pro er direction to discharge the contents is a ways insured.

It may also be desirable to provide the wedge surfaces 22 on the disk 19 with knife. edges sothat if rotated in a reverse direction the same will out into the ribs 20, thus cf fectnally preventing the retraction of the piston. 3

As' a further revision and. protection a%ainst refilling, it will be noted that the T1 hasvbeen advanced to the upper orforward end of the receptacle, in *which position the contents are practically all discharged. the

above construction and inany apparently v widely diiferent embodiments of my inventi-on designed--yvitliout departing from the G5.

scope of the appendcd'claims, I intend that said cylindrical receptacle, a 0

wall thereof and having 6.. In a grease gu-n incombination,- piston 1s released from engagement with the ;.:ceptacle,' a piston movable longitudinally the helix"therein, means for movin said in in said recap tacle, and means comprising a series of all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative merely of an operative embodiment of my invention and not in a limiting sense.

What'I claim is: i v

1. A grease gun comprising a completely closed receptacle, 'a. helix extending longitudinally therethrough, a follower adapted to be advanced in said receptacle by rotation of said helix, and cogacting devices pro vided on said follower and said. receptacle whereby retraction of helix is prevented. n

2; A grease gun comprisinga cylindrical receptacle closed at both. ends by means nonremovable except by rupture a'piston in llower, means for advancing said follower in said receptacle, and co-acting devices provided on said follower and receptacle whereby retraction of the follower is prevented,

3. A grease gun comprising a cylindrica receptacle, a piston therein, a rotatable cap closing one mid of said' receptacle, and a helixosecurcd at one end to said cap and in said-follower by said threaded engagement with said piston, said helix'serving to prevent displacement-"0f the cap from the receptacle and comprisin aj pair of twisted wires secured at one en to said cap.

4. Atgrcase gun comprising a receptacle having a helix extending 'lherethrough, a 7 piston devicein threaded engagement with- I said helix, said piston device presenting a shoulder and a wedge member, and .co actmg means on. said-"receptacle adapted to be engaged respectively by said shoulderv and wedge member upon n tation of the helix in opposite directions, for the "purpose 'set forth,

5.A grease gun comprising a receptacle havinga helix ex'tendingtherethroligh, a piston device in 'threadcd engagem'ent with said helix. said iston devicepres'ent'. g. a

shonlder,and w v are*meinber, and co-act ng means on said receptacle adapted e'n-.

gaged respectively "by said shoulder 'and wedge member upon rotation of the heliii'nopposite dh-ectious for the purpose set s 20 do not extend to theextreme top of the receptacle 2, so that when the piston one. direction longitudinal y longitudinally spaced pri'ijecti'ons on said receptacle adapted to-be engaged by [said--' piston to prevent longitudinal "movement thereof in an opposite direction,

7 In'a grease gun, in combination areceptacle, a piston movable longitudinally,

therein, said piston being provided with a knife edge portion, means for moving said piston in one direction longitudinally in said receptacle, and means adapted to cause said knife ed portion of said piston to engage a portion of said reoeptacleand to prevent retraction of said piston in the ret'eptacle. I

8. In a grease gun, in combination, a receptacle provided with ltmgitudinal ribs, a piston movable longitudinally therein, said piston being provided with knife edge portions, means for moving said piston in one direction longitudinally in saidreceptacle, said means being adapted to causesaid knife edge portions of said piston to engage said ribs aml prevent retraction of said piston in li uid receptacle.

9. In a grease gun, in combination, a receptacle provided with longitudinal ribs with a series of spaced projections, a piston movable longitudinally therein, said piston being provided witb wcdge shaped 'kni'le 'cdge portions, means for movingv said piston in one direction longitudinally in said rcoptaclc, said moans being adapted to cause said wedge shaped knife edge portions of said plston to engage said ribs and pro jections and prevent retraction of said piston in said receptacle.

10. In a greasecgun, in combination, a receptacle, a piston}, positioned therein piston operating means adapted to move said piston longitudinally in said receptacle, and means adapted to render said piston. operating means inoperative to move said piston longitudinally in said receptacle when said piston has been moved to one end of its travel in said receptacle.

In a grease gun, in combination, a receptacle having a rib extending l0ngit11dinally thereof from one end to a point adjacent the opposite end, a piston positioned in said receptacle and adapted to be moved longitudinally therein in engagement with .aid rib, .a. helix operatively piston and adapted to move said piston longitudinally in said receptaole'while said piston is in engagement witlrsaid rib but rendered inoperative to move said piston in either direction longitudinally when the piston passes out of engagement with said rib.

Signed at the city, county and State of New York, this 29th (la of Dec., 1917.

v JOHN MAOGREGOR,

'45 engaging said