US1428835A - Wrench - Google Patents

Description

C. 0. BORKMAN.

WRENCH.

APPLICATION FILED sEPT.1. 1921.

l ,428,835, Patendsept. 12,1922.

@Houd ms Patented Sept. 12, 1922.

PATENT ermee.

'CARL '0. BOR'KMAN, 0F VICTOR, COLORADO.

WRENCH.

Application filed September 1, 1921.

T0 all w 7mm t may cow/cera Be it known that CARL O. BORKMAN, a citizen of the United States, residing at Vic tor, in the county of Teller and State of Colorado, have invented certain new and useful Improvements in Wrenches; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved wrench of the clinch-adjustable type which can be advantageously used upon pipes.

The principal object of the invention is to generally improve upon wrenches of this class by producing one of extreme simplicity and durability, which is such in construction `that it can be quickly adjusted to fit various .diameters of pipes with one hand.

Another' and very important object of the invention is to provide a wrench embodying thevusu'al handle and fixed jaw, together with va freely movable jaw slidably mounted on the handle and held 4in various set positions by novel mechanism which embodies a locking lever or catch carrying a spring which yexerts tension against themovablc jaw to maintain the latter in various positions in which it is placed by hand previous to engaging it with ythe work, after which it functions to hold the movable jaw in engagement with the work, and has the additional function of automatically moving the locking lever to operative position when taking a new grip.

A further object of the invention is to provide a wrench of the foregoing construction, the movable jaw being so shaped and connected with the slidable carrier that it automatically obtains a more effective grip on the pipe when the handle is moved in the vdirection for turning the latter, this particular shape being also advantageous in that it enables the wrench to be quickly and veasily disengaged from the work.

A still further object of the invention is to devise a wrench of the type set forth above, wherein t-he parts are so arranged that the aforesaid spring coacts with the movable aw in a manner to move said jaw away from thework when the lever is de pressed by the finger, whereby to'facilitate Serial No. 497,562.

disengagement of the wrench from the work.

yOther objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same:

Figure l is a side elevational view, with a portion of the carrier removed, showing the parts in their normal position.

Figure Qis an edge elevational view of `the improved wrench.

Figure is a view like Fig. l showing the position of the parts at the time the wrench is engaged with a piece of pipe.

Figure 4 is a transverse sectional View taken substantially on the plane of the line 4 4 of Fig. l.

Referring to the drawings by numerals, l designates a handle which is equipped .at its outer end with a laterally disposed fixed jaw 2. Slidably mounted on this handle is a substantially U-shaped carrier 3, between the side portions of which, a movablesubstantially arcuate toothed aw 4 is Vpivotal'ly connected at one 4end as indicated at 5. It is to be noted here that the inner edge portion of this aw is vrounded as indicated at '6 to serve a purpose to be hereinafter described. Also disposed between and pivot'ed to the side portions of the carrier 3 is a locking lever 7 which is fulcrumed between its ends as indicated at 8. Along its inner edge, this lever 7 is equipped with a tooth or projection 9 which is designed to be received in yone of the depressions 10 formed along the inner edge of the handle. Anchored lat one of its ends tothe intermediate portion of the lever 7 "is a comparatively stro-ng flat spring 11 which is of such a length that the free Aend of one of the arms thereof bears against the curved inner end or surface 6 of the movable ja-w 4. Note should be made of the fact that vthe point of engagement of the spring arm just mentioned, is inward of 'the pivot pin, that is in rear of said pin. Hence, as-before indicated, the spring serves four important points. First, it maintains the jaw yin engagement with the worl. Second, it holds roo not least, it serves to swing the jaw away from the work, whereby to facilitate disengagement of the wrench from the work, this engaged with the pipe.

outward movement of the jaw taking place when the lever is depressed to permit sliding movement of the guide. lt' is also to be stated here that by an arcuate jaw in the manner shown, the latter is permitted to swing on its pivot so that it can be swung outwardly a considerable distance to enable the innermost or intermediate teeth to be Furthermore, it is yet to be pointed out that a pin 12 is passed transversely through the side portions of the carrier 3 to limit the canting of this part of the device, this pin bearing against the inner edge of the handle las shown.- ,y

The operation of the improved wrench is as follows: l move the vjaws comparatively closetogether for engaging them with a rather small pipe,

it will be seen that it is only necessary tov place the/thumb against the upper end'of the lever 7 as indicated in Figure 3 and *to push inwardly. Such action lifts the toothed projection 9 out of the depression in which it is then seated and the carrier can be slid along the handle to place the movable jaw. l vat the desired point. To

obtain theinitial grip on the pipe, the movable jaw 4L is manually forced into engageinent with the pipe and the spring 11 which exerts a tension against same, serves to hold it in the position to which it has been moved. To turn lthe pipeit is onlynecessary to move the handle in the ,direction of the arrow A. Due to the peculiar shape of the movable jaw, it will be seen that such movement of the handle will cause the jaw vto yobtain a tighter and more effective grip on the pipe as is moved in this direclVhen moving the handle in an opmatically disengaged from the pipe and the spring 11 will maintainthe latter in a position to grip the pipeagain when the handle ismoved in the direction first named.

By carefully considering the description in connection with the drawings, persons obtained with the construction and arrangefamiliar with devices of this class will doubtless be able to obtain a clear understanding of they invention. Therefore, a more lengthy and detailed description is deemed unnecessary.

Since probably the best results may be ment herein shown and described, this is taken as the preferred embodiment of the invention. However, I wish it to be-understood that minor changes coming within Assuming that it is desired to the scope of the subjoined claims maybe reous adjusted positions, and unitary means i carried entirely by ls aid lever and operatively engaged with themovable jaw` for maintaining the latter in various positions prior to engagingfit with the work, for

holding it in engagement with the work,

for :rendering the aforesaid kco-acting means effective, and` for swingingv the jaw kaway from the work when the outer endfof the lever is pressed tow-ard the handle to render the aforesaid co-acting means ineffective. 2. A wrench comprisinga handle' having i a laterally disposed fixed jaw at its outer end, a carrier slidably mounted on said handle, a movable jaw pivotally connected at its inner endto said carrier, the inner end of said. jaw being rounded or curved, a locking pawl or lever fulcrumed between .the ends on said carrier, coacting means between the lever and handle lfor' holding the carrier vin variousvadjustedpositions, j and a fiat spring connected in the `intermediate part of said lever` and bearing. at its: free end on the curvedor roundedV inner end `of the pawl yinward of the pivot point of the latter, said spring serving to maintain the .jaw` in various positions to hold it incengagement with the worlrto render the aforesaid coacting means effective and servingto 'swing the vjaw vaway lfrom ,the work when the lever is pressed to render the aforesaid coacting meansl ineffective. A f

3. A wrench ofthe class described comprising a handle having a laterally disposed stationary jaw at its outer end ,and being provided along its inner edge witha plurality ofclosely spacedv depressions, a :sub-

'stantially U-shapedl carrier having its side portions disposed on'opposite sides of said lhandle, a pin passingthrough the side portions of the carrier and engageable with the inner edge of said handle for limiting the degree of canting of the carrier,` a substantially arcuate toothed jaw pivoted at oneend between the side portions of said carrier adjacent the upper'cornersthereof, the

inner pivoted` end of said jaw being rounded or curved, a manually actuated locking lever fulcrumed between its ends von the side portions of said carrier 4adjacent the lower corners of said side portions, the edge of said lever adjacent the inner edge of the aforesaid handle being flattened to extend in substantial parallelism with said handle able jaw for maintaining the latter in variand being equipped with a lug or projection ous set positions, and for holding said lug designed for reception in one of the aforein said depression. 10 said depressions, and a flat spring secured In testimony whereof I have hereunto set to said lever intermediate the ends of the my hand.

latter, 4the free end of said spring bearing against the curved inner end of said mov- CARL O. BORKMAN.

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