US1306534A - Pipe-wrench - Google Patents

Description

A. J. GRNBERG.

PIPE WRENCH.

APPLICATION FILED FEB. Il. IQIs.

Patented June IO, 1919.

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ALBERT J. GRANBERQJQF vsanfrzmin'cisco; c"AuronNIA.-v1

" n PIPE-WRENCH. Y

Specification of Letters'latent.

, r'Patented June 10, 1919.51'

np'piicationrmed re'bniaj *11, 191s. 'serial Nogzialiaei l To all whom may Gomera.' i

Be itknoivnthat I, ALnR a citizenbfthe United Statesres1d1ng at San'Francisco, .inthe county ofrSa'n Francisco and Stateof California, have invented new yand useful Improvements in Pipe-Y y p mits the fingerland .thumb-'of the operatori` f to contact with opposite sidesrof said worm, j ,A for-,thepurpose of rotatingthe same,= for which purpose. also the edges of,A the` worm 65 Wrenches, of which vthe following isa speciication. The present invention relates to improvements in pipe wrenches, the purposeof the 5 invention` being to providea pipe wrench which can be used to turn a pipe lying close" to a wall or other object and which willbe strong and durable. which can bev readily adjusted for different sizes of pipes, 'whichr will automatically, when applied to the pipe, gripY thesame initially, so that imme-Y diately -upon thel movement of the hand to turn the pipe the grip upon the pipe will be strengthened-and by which on a further movement of the hand thel vpipe-can beY gripped with a very powerful pressure, thus absolutely preventing slippage of the wrenchA upon the pipe; l. v

In the accompanying'drawing Figure 1 is a side view of my improved pipe wrench; Fig. 2 is a rlongitudinalsection of the same; Fig. 3 is a tranverse section on the line 3-3 of Fig. j f n i Referring to the drawing, 1 indicates/a stationary jaw and 2 a movable or adjustable jaw. Said jaws 1, 2, are provided with opposing serrated surfaces, 3, 4, respectively, which, when the jaws are in their proper relative positions diverge slightly from each other. The jaw 2 is provided with a guide 6 extending in a direction in general transverse to the working face 4 of the jaw, and projecting `considerably in front of said working face. Said guide is of an approximately cylindrical form, and is connected to the jaw by a narrow neck 7. Said guide moves in a guideway 8 extending in the jaw Y1 in a direction transverse to the working motion jof the extension is substantially Y i y so so.,that there is verylittle lateral motion of Q SeldXtenSOn.17;up0r1the eedaof therwormf n able'on shaft12,extending into jaw;l J. GrRANBnRG,` v l 1 parallelwithfthe'guidd theinnerend of@ said shaftfbeing screwedk into saidj'aw 1 The jaw lhas an. opening 10 therethrough rv extending from side .to side,fin` whichk open- V60 ing the 'wornifll is located, and which perj arezmilled, asv shown uat Thehaldle 14ofg't Ye wrench to-i the jaw l-by apivot pin 16lextending transf i verselythroughpsaid jaw, and of which the innerend is screwed into the jaw, Vthe 'lower portion of saidjawbeing bifurcatedto receiverthe upper reducedk portion of said han-` dle. Said'r'e'duced portion;hasAA at its upper j end a forked extension 17', the membersof which extend on opposite sides'of shaft 41 2, 75

andV can bearagainst an endv of the worm ll onjsaid shaftwltjwill Abe observed that the position of `the pivot 16' is such that the in alinement with the motionof the worm Y,11

Adight' spring 18, riveted at one end, as

Shawn at 19,.,to` the jaw lf, bearsgat itsrothen ;.end,: aga1nst a shoulder 22 of said handle, 85

and turns said handle about the shaft 16 and thereby presses said forked'extension against vsaid worm. A side of the transverse opening 1() forms a stop to limit the longitudinal movement of said worm with the inward movement of said guide 6, and a shoulder 23 on the jaw- 1, adjacent to the 'spring 18, by limiting the corresponding movement of the handle 14, limits the longitudinal movement of the worm opposite to that first named, to prevent the extension 17 from moving out of engagement with the end of the worm due to its pivotal or lateral movement while the worm moves longitudiattained by the extension 17 striking against ythe portion of the jaw 1 in which is the head 'of the screw 12.

The following is the mode of use of the nally outward. This eiect would also be 100 wrench: The worm is first turned to move the movable jaw to such a distance from the irst jaw that the outer ends of the jaws are spaced apart slightly less than the diameter of the pipe to be turned by the wrench.

The jaws are then applied on opposite sides of the pipe, `and the Wrench is moved t0- Ward the pipe, causing the movable jaw to slide outwardly, carrying with it the worm, against the slight pressure of the spring 18, which pressure is, however, suflieient to cause the jaws to grip the pipe. Then, if thel handle be turned in the direction away from the spring, the Yeffect will be to cause the extension 17 of the handle to bear against the worm and press it toward the stationary jaw, thereby causing also the movable jaw to move toward the stationary jaw, and rmly gripping the pipe wrench so that, in the continued movement of the handle, the pipe gripped thereby is turned.

It will therefore be seen that my improved pipe wrench possesses all the desirable qualities of a pipe Wrench, namely, that it is of great strength, that it eanbe easily adjusted to different sizes of pipes, that it immediately, when applied to the pipe, furnishes an initial grip on the same, and that, when the turning movement is commenced, the grip is correspondingly increased. n

But perhaps the most striking advantage of my improved wrench is that it can be used to turn pipes which are close to a wall or other object and which cannot be gripped by the ordinary pipe wrench.

I claim zl. A wrench comprising' a fixed jaw, a slidable jaw arranged 0n said fixed jaw, a Worm arranged iii said fixed jaw and engaged with said slidable j aw for controlling the movement thereof relative to said fixed jaw, and a handle pivoted in said fixed jaw and having an extension for engaging one end of said worm, the pivot of the handle being so located that said extension will overlap the end of the worm in all positions of the handle, said worm being mounted to slide freely longitudinally toward said extension when said handle is turned in a di- 4reetin to permit the jaws to separate,

whereby movement of the handle in the opposite vdirection causes said extension to engage and move the worm, thus eeeting movement of the slidable jaw toward the iixed jaw for gripping the Work.

2. A wrench comprising a fixed jaw, a slidable jaw arranged on said iixed jaw, a Worm arranged'in said fixed jaw and engaged with said slidable jaw for controlling the movementthereof relative to said fixed jaw and supported upon a kfixed pivot pin for free limited longitudinal movement in said xed jaw when permitted by the handle, and a. handle pivoted in said fixed jaw adjacent o'ne end of said worm and having an extension underlying said end of the Worm, the handle pivot being so located that said extension will moveiin a curved path lying substantially in the direction of the axis of said worm and will remain in position to engage the end of the worm in all positions of.

said handle, movement of the handle on the working stroke of said Wrench serving to move said extension against said worm in the same direction as and coextensively withy the longitudinal movement of said worm, and movement of the handle in the opposite direction permitting the Worm to have unrestrained movement Within the limits of travel of said extension.

A. J GRANBERG.

Copies'of this patentfmay bel obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. y

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