US1320615A - Pipe-whench - Google Patents

Description

S. N. HALL.

PIPE WRENCH.

APPLICATION FILED SEPT-2,1916. RENEWED IAN. 28, I919.

Patented Nov. 4, 1919.

SAMUEL N. HALL, OF MEMPHIS, TENNESSEE.

PIPE-WRENCH.

Specification of Letters Patent.

Patented Nov. 4, 1919.

Application filed September 2, 1916, Serial No. 118,158. Renewed January 28, 1919. Serial No. 273,688.

T 0 all whom it may concern:

Be it known that I, SAMUEL N. HALL, a citizen of the United States, residing at Memphis, in the county of Shelby and State of Tennessee, have invented new and useful Improvements in PipeWVrenches, of which the following is a specification.

This invention relates to new and useful improvements in pipe wrenches, and has particular relation to wrenches of the chain type.

The object of the invention is to provide a double acting wrench, wherebysections of pipe may be turned in either direction, said wrench being provided with detachable, reversible jaws which may be readily removed when worn out and replaced with new ones.

Another object of the invention is to provide a wrench of the character described which is also adapted to be used in screwing and unscrewing collars and other narrow pipe fittings.

A further feature of the invention resides in the novel arrangement of the jaws and the method of attaching them to the handle.

A still further feature of the invention embodies a grip chain and an improved means of fastening the same to the wrench handle.

lVith the above and other objects in view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of the wrench as applied to a pipe section.

Fig. 2 is a. fragmentary. side elevation thereof showing the near jaw removed.

I Fig. 3 is a front end view thereof as applied to pipe fittings, and

Fig. 4 is a sectional view taken on the line etl of Fig. 2.v

Referring now more particularly to the drawings wherein like numerals of reference designate similar parts in each of the figures, the numeral 1 refers to a wrench handle which is preferably formed of steel or some other strong material and-is of a size at its free end to be readily grasped and gradually increases in size toward the other end. The enlar 'ed or operative end of the handle has two hooks 2, 2, whichproject up and rearwardly therefrom, between which is the slot 3,;the purpose of which will be hereinafter movement relative to the handle.

method shown.

set forth. At the operative end of the handle opposite said hooks is the jaw 4 which is secured at one end to the handle by means of the bolt 5 which passes through said end of the, jaw and the handle and the other end of said jaw is provided with a stud which projects into an opposing recess in the handle and said jaw is thereby securely held against However, any preferred method of securing said jaw to the handle may be adopted and I do not wish to confine myself to the particular The free side of the jaw 4: is arcuate and toothed, so as to readily engage with the pipe to be turned thereby, the teeth inclining slightly from the operative end of the handle.

Secured upon the respective sides of the operative end of the handle are the jaws 6, 6. Ihese aws are secured to the handle by means of the bolt 7, which passes through said jaws and through the handle. The jaws are reversible, in general contour being substantially elliptical in form and having their opposite edges toothed, the corresponding teeth on each edge having a slight inclination toward the corresponding end of the jaw. It is obviousthat with this form of jaw, when the teeth at one end become worn, the jaw may be reversed end for end and when the teeth at one edge become worn, it may be reversed edge for edge. The contour of the aws is such that when secured to the handle one end of each jaw will project beyond the operative end of the handle, said projecting ends being in transverse alinement while the operative edges of the opposite ends of the jaws will be in transverse alinenient with the aw at. As shown in Fig. 1, the pipe is shown in dotted lines being turned in one direction, and in full lines being turned in the opposite direction. In wrenches of this character now in common use, when the pipe is being turned in the direction indicated, in full lines in Fig. l, a single jaw as 4 is employed, the side jaws 6 not being extended back to engage with the pipe. That form of wrench is objectionable in that when only a single rear jaw is employed it does not give sufficient bearing surface and the pipes are sometimes crushed, or the point of contact being limited, the teeth of the jaw cut and mar the pipe too deeply, and furthermore the teeth of the single jaw soon become worn so that they will not engage with the pipe. .To overcome this objection, the side jaws 6 have been extended back and toothed on each edge, the corresponding teeth being in alinement withthe teeth of the jaw a so as to engage with the pipe and extend thebearing surface of the wrench therewith.

A grip chain 8 is provided, one end of which is attached to the handle in a manner hereinafter to be described. This chain is of the 'type ordinarily employed in wrenches of this kind, wherein the pintles 9 project past the side links 10, which construction adapts the chain to fit into the slot 3 between the hooks 2 while the ends of'the pintles project out'laterally a suflicient distance to engage behind said hooks. The chain. 8 is thus secured around the pipe and when the pipe section is to be turned in one direction, the adjacent edges of the projecting ends of the aws 6 will be employed, as shown in dotted lines in Fig. 1, and when it is to be turned in the other direction, the wrench may be shifted so that the jaw 4 and the corresponding ends of the jaw 6 will be brought into engagement with the pipe, as shown in full lines in Fig. 1, without releasing the grip chain. Between the operative ends of each jaw 6 on each side there of a recess 11, afio'rding a suilicient clearance to permit this transfer of the pipe from one set of teeth to the other without releasing the chain, and permitting slack in the chain for its release, when the pipe is placed in said central recess.

For the purpose of permanently securing one end of the chain to the handle, I have provided an improved form of rivet 12 which passes through the operative end of the handle back of the jaw 1 and passes also through the end links 13, 13, of the chain, said links being elongated to permit the free movement of the chain relative to the jaws. The links 13, 13 play between the central jaw at and the side aw 6 on each side, the adjacent parts of the handle as at 14:, 14, being countersunk to afford space for the free play of said links 13, 13, as illustrated in Figs. 2 and 4.

. One end of the rivet 12 has the head15 integral therewith and the opposite end has the'head 16 secured thereon and the corresponding ends of the links 13, 13 operate freely upon said' rivet between the inner sides of said heads and the countersunk portion of the handle. The inner side of each of the heads 15 and 16 projects inwardly beyond 'the inner side of the corresponding jaw 6 and the end of the rivet 12. receiving the head 16 is shouldered down, as shown in Fig. 4; so as to fix the distance between the heads 15 and 16 and to prevent the clamping of the links 13, 13 against the handle, thus providing for the free movement of said links. .The inner side of each jaw 6, at each end is provided with a socket ing sockets 17 receive said rivet heads which fit closely therein and form an additional anchorage for the aws 6 and prevent them from moving relative to the handle.

This form of wrench is also adapted to be used in screwing pipe fittings and collars and the like on pipe sections as is illustrated in Fig. 3. Such fittings as 18 are usually narrow and the jaws 6 are spaced too far apart to engage therewith. In screwing and unscrewing said fittings the jaw 41 may be applied which will readily engage with said collars and fittings however narrow they 'm ay be. This feature constitutes a peculiar advantage of this form of wrench because the ordinary pipe wrenches now in common use cannot be used for such purposes.

That I claim is:

1. A wrench including a handle, a pair of toothed side jaws rigidly connected to the work engaging end of the handle, one on each side thereof, said side jaws each having one end projecting beyond said workengaging end of the handle, a third jaw vsecured to thehandle between the other ends of'the side jaws which project toward the hand engaging end of the handle said third jaw being spaced on each side from the side jaws, a chain having links secured to the handle upon each side of said third jaw,

,and operating in the space between said third aw and the slde aws, means at the work engaging end of the handle for securing the free end of the chain when placed v around the work. v2. A wrench including a handle, a pair of double ended side jaws fixed to the respective sides of the operative end of said handle, the edges of each of said jaws having teeth which incline toward the corresponding end of the jaw, said jaws projecting beyond the handle at one end, a fixed jaw secured to the handle between the opposite ends of the side jaws and spaced from and in transverse alinement with said last mentioned ends, a chain one end of which has a link which embraces said central jaw, a bearing member carried by the handle upon which said link operates, said side jaws bearing against said member to prevent them' from binding against said link and means at the operative end "of the handle to engage said chain when cooperating with said jaws.

j 3 A wrench including a handle, a 'pair of SlClGJZLWS, one fixed to each side of the V operative end of said handle, the inner side of each of said aws being provided with a socket, a jaw fixed to the handle and spaced from each of said side jaws, a chain having an end 1111]: which embraces the central aw,

a pin through the handle, upon the respective ends of which said link operates, enlarged heads carried by the respective ends of said pin, said heads being spaced a fixed distance apart to prevent the clamping of said link against said handle, and fitting in the corresponding sockets of said side jaws, and chain engaging means carried by the handle.

4. A wrench including a handle, a gripping member secured to the handle adjacent its operating end, a jaw secured upon the handle on each side of said gripping member and spaced therefrom, one end of each jaw projecting beyond the handle end and one operative edge of the other end of each jaw being in transverse alinement with the gripping member, a grip chain one end of which is permanently fixed, and the other end of which is detachably secured, to the handle and means preventing the side jaws from clamping the chain against the handle.

5. A wrench including a handle a toothed gripping member secured to the handle adj acent its operative end, a jaw secured upon the handle on each side of said member and spaced therefrom, the edges of each end of the jaws being toothed, one end of each jaw projecting beyond the handle and one operative edge of the other end being in transverse alinement with the gripping member, a grip chain having links which are pivoted to the handle on each side of said gripping member, means to prevent the side links from binding against said gripping member and means carried by the handle to which the free end of the grip chain may be detachably secured.

6. A wrench including a handle, a toothed gripping member secured to the handle adj acent its operating end, a jaw secured upon the handle on each side of said member and spaced therefrom, the inner side of each jaw being provided with a socket and the edges of said jaws being toothed, a bearing member projecting each way from the handle, whose ends are formed into enlarged heads which fit within said sockets, a chain whose links at one end have bearings on the respective ends of said bearing member between said heads and the handle, and means at the end of the handle to engage the chain.

7 A wrench including a handle, a pair of side jaws rigidly connected to the operative end of the handle, one on each side thereof the ends of the jaws being of uniform contour and the edges thereof being toothed, said jaws projecting at one end beyond the corresponding end of the handle, a jaw fixed to the handle between opposite ends of said side jaws and spaced therefrom, a chain having links at one end which embrace said fixed jaw and are pivoted to the handle, means to prevent said links from binding against the fixed jaw and means at the end of the handle to engage said chain.

8. A wrench including a handle, a pair of toothed side jaws connected to the work engaging end of the handle, one on each side thereof, said side jaws each having one end projecting beyond said end of the handle, a third jaw secured to the handle between the other ends of the side jaws which project toward the hand engaging end of the handle, a chain one end of which is permanently secured to the handle and means at the work engaging end of the handle for securing the free end of the chain when placed around the work.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL N. HALL.

Witnesses R. H. HUNTER, P. O. Cor'rnN.

Copies 01' this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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