US Patent: 589,038 - Pipe Wrench


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US Patent: 589,038

Pipe Wrench

Patentee:

Jay K. Sheffy (exact or similar names) - Chicago, IL

USPTO Classifications:

81/65, 81/68

Tool Categories:

wrenches : pipe wrenches : chain and strap wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Jan. 07, 1897
Granted:	Aug. 31, 1897

Patent Pictures:

Jay K. Sheffy patent August 31, 1897

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Description:

Louis K. Gillson - patent attorney

The invention relates to that class of pipe wrenches in which a chain is used in cooperation with a serrated jaw and its object is to provide a simple, durable, and strong construction whereby the chain may be used to bring the jaw firmly to the work.

I claim as my invention—

1. In a pipe-wrench the combination with a handle-bar, and a chain attached to the end of the bar by a swiveled joint, of a shank sleeved upon the handle-bar and in screw threaded engagement therewith, and a serrated jaw carried by the shank and having its back adapted to engage the chain.

2. In a pipe wrench, the combination with a handle-bar, and a chain attached to the handle-bar by a swiveled joint, of a shank sleeved upon and in screw-threaded engagement with the handle-bar, the shank and handle-bar having smooth cooperating bearing-surfaces upon each side of their cooperating screw-threaded portions, and a jaw fixed upon the shank for cooperating with the chain and having its back adapted to engage the chain.

3. In a pipe wrench, the combination with a handle-bar, and a chain attached to the end of the handle-bar by a swiveled joint, of a shank sleeved upon and in screw-threaded engagement with the handle-bar and carrying a jaw for cooperating with the chain, the throat of the shank-aperture being oblong in cross-section, its major diameter being parallel with the plane of action of the chain, the chain having a thickened portion near its attached end to limit its inward movement.

4. In a pipe-wrench, the combination with a tubular jaw-carrying shank, and a handle bar adapted to fit within the shank and being in screw-threaded engagement therewith, of a chain and a swivel-block attached to the chain, such block being attached to the end of the handle-bar by means of a T-shank on one of said members and a cooperating T-socket in the other of said members.

5. In a pipe-wrench, the combination with a tubular jaw-carrying shank, and a handlebar adapted to fit within the shank and being in screw-threaded engagement therewith, of a chain, a swivel-block attached to the chain, and having a transverse T-socket in one end, and a T-shank on the end of the handle-bar for engaging the socket.

6. The combination with a handle-bar, a chain attached to the handle-bar by a swiveled joint, and a tubular shank sleeved upon the bar and in screw-threaded engagement therewith, the shank and bar having cooperating smooth bearing-surfaces upon each side of their screw-threaded sections, of a pair of relatively flaring bifurcated jaws mounted upon the end of the shank, one of such jaws having a serrated face, hooks or notches on the back of such jaw, and laterally-projecting studs carried by the chain for engaging such hooks or notches, all substantially as described and for the purposes set forth.

Corresponding Canadian patent no. CA-57,603 was issued Sept. 28, 1897.