US1545380A

US1545380A - Jack

Info

Publication number: US1545380A
Application number: US681370A
Authority: US
Inventors: William C Woodings
Original assignee: VERONA TOOL WORKS
Current assignee: VERONA TOOL WORKS
Priority date: 1923-12-18
Filing date: 1923-12-18
Publication date: 1925-07-07
Anticipated expiration: 1942-07-07

Description

July 7, 1925. 1,545,380

W. C. WOODINGS JACK Filed Dec. 18, 192:5

' mvENToR Patented July 7, 1925,.

i unirse s'rAr-Es PATENT ori-*ica warm/r." c. Wammes.. or venom; rernsrtvanraAsesinos reet, worms, or :riassume @massimale A, cortesemente measureme- JACK.,

Application f lod December- 18, 18223, 8eria1'Np. `68153310.

jacks and more particularly tok improvements therein `for the `purpose of minimizing weer and friction between the frame. and: the

lifting bar, for increasing the length of life e ofi the` jack, `and decreasing the required power for operating the. same.

It has heretofore. been proposed in the art to which this invention relates to4 provide antivfriction means between the. lifting bar 4and the frame, in order to. decrease friction therebetween 'during the. o eration ofl the jack. In the constructions retofore used, however, the anti-friction or rollers have usuallyV been mounted' loosely in` a pocketin the frame ofthe When the lifting bar was operated, the balls or rollers, being loosely mounted, all tended to move towards one end ofthe pocket and to jam' against each other. The rubbing action between the balls or rollers and between the same and the lifting bar was such as to wear flat surfaces on the anti-friction members and cause them to eventually lose their ability to rotate. The anti-friction members (thereafter simply acted as a single stationary friction means between the bar and the frame. In other words, the anti-friction members then functioned to increase the friction between the bar and the frame instead of acting to decrease theV friction therebetween. Anti-friction rollers have also been employed to rotate about `fixed axes, these fixed axes being provided by pins or trunnions journalled at their ends in the frame of the jack. This manner of mounting the rollers not only increases the cost of construction, but also increases the difficulty of assembling the parts.

By the present invention, I propose to i mount the anti-friction rollers for rotation jackl This construction enables the rollers' i to be readily placed the bearingsand the assembled rollers and bearings tobe 'easilymounted in the frame.

In the accompanying drawings,` which il` lustrate a preferred embodiment-of my in-` vention, 1 i" Figure lis a side elevation, vpartly'broken away, illustrating a jack havin-gimy i 1 nincorporated comprising a frame member. and a `lifting bar between whichthere lijs a relative move ment `axially `of the bar. In the construci ,tion'illustrated there is provided a frame 2 havingan opening 3 extendin longifV tudinally therethrough and in. wi ich is located a liftingbar 4.- The lifting bar is formed with a series of teeth 5 providing an operating rack and is provided with both a lifting foot 6 and a `lifting head 7. As is customary in the art, vthe frame is provided with a pivotal mounting S'for an operating handle 9 which extends beyond the opposite sides `of its pivotal'mounting. On its inner end the handle carries a pivotally mounted lifting pawl 10, which is adapted to engage the teeth 5- on the lifting bar for raising the bar as the outer end of the handle is swung downwardly. The bar is held in its elevated position during the return movement ofthe i operating handle vby a holding pawl 11.

During operation ofthe jack, it will be apparent that the lifting pawl 10 tends to force the lift-ing bar away from the pivotal axis of the pawl and into engagement with the rear portion of the frame. In order tov minimize to as great anextent as possible the resulting friction, anti-friction rollers l2 are arranged in a pocket 13 in the frame. These anti-friction rollers engage the rearv edge of the lifting bar and prevent the same from coming into frictional engagement with the,`

rear portion of the frame. journaled in open bearings formed in a .U-shaped member 14. This U-shaped member Mis of approximately the same Width and length as the corresponding dimensions Therollers 12 are Y, Y 105..

of the pocket 13, so that the U-shaped member is adapted to fit vsnugly. in 7.said

pocket. w a

It will be apparent that the Ushaped member 14 maintains the rollers in iXedx spaced relationship and that the construction is such as to enablef'the rollers'to be quickly mounted in said bearings and the bearings readily asselnbled in the pocket in the jack. While I have shown the bearingsas formed in a U-shaped member, it will be understoodthat the invention is .not limited to this particular form vof construction, but

2. In a jack, a frame., a lifting bar,-and a f plurality of anti-friction rollers eifectiveintermediaterthe frame and the lifting barv for maintaining the bar out of' direct sliding en-A gagement with the frame, said rollers being mounted in bearings which maintain them'- in fixed relationship, said bearings'being lformed in a removable member which is held in'position by said lifting: bar, substantiallyl as described. v

V3. --In a jack, a Yframe, ay lifting'bar, and

plurality of spaced anti-friction rollers arranged inY a pocket inthe ramegfory maintaining the barout of direct sliding` engagement with the frame, said rollers being mounted in bearings formed in a member which is held in said pocket by'4 said ylifting `bar,"substantially as described.

.4. In a jack, a frame, a lifting bar, and

a plurality of spaced anti-friction rollers arranged in a pocket in said frame for maintaining the bar out of direct sliding engagement with the frame, saidk rollers being mountedin removable open bearings formed in a member positioned in said pocket, said rollers being held insaid bearings by said lifting-bar, substantially as described.r- Y

5. lIn a'jaclna'frame, a lifting bar, and a plurality of* spaced anti-friction rollers'arff ranged in a pocket in said frame for main-vv taining the'bar out of direct sliding engagement with the frame, said rollers being mountedin -open bearings formed in :a -U- shaped member removably seated in said pocket, substantially yas described.

6; In ,a jacln'a frame, a lifting ban slideffective intermediatethejfra-me :andthe lifting bar for maintaining the bar out of direct tiall-y as described.- l VIn 'testimony whereof Ihave hereunto set 1 my handf WILLiA-M o-jvvooniNGsQg l k6o able in said frame, and ananti-friction roller;