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US Patent: 181,990
Improvement in Tubing-Chain Wrenches
Patentee:
Orlando H. Smith - Kane City, PA

USPTO Classifications:
81/65.2

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. C. Kemon
Edw. W. Byrn
O. M. Cook
Sam. Reynolds

Patent Dates:
Applied: Jul. 26, 1875
Granted: Sep. 05, 1876

Patent Pictures:
Orlando H. Smith Pat. September 5, 1876
USPTO pdf tiff
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Description:
Two gripping surfaces on a hook, and a reversible dog on a block, together with an intermediate length of chain, form a wrench to tighten or loosen lengths of drill stem pipe.

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