US Patent: 876,925 - Chain Pipe Wrench


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US Patent: 876,925

Chain Pipe Wrench

Patentee:

George Amborn (exact or similar names) - New York, NY

USPTO Classifications:

81/70

Tool Categories:

wrenches : pipe wrenches : chain and strap wrenches

Assignees:

J. H. Williams & Co. - Brooklyn, NY

Manufacturer:

J. H. Williams & Co. - Brooklyn, NY

Witnesses:

Patent Dates:
Applied:	Mar. 08, 1907
Granted:	Jan. 21, 1908

Patent Pictures:

George Amborn patent January 21, 1908

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Description:

Amborn received three interrelated patents on January 21, 1908 -- this patent, 876,926, and 876,927. The patent date appears on some models of Williams' VULCAN chain wrenches. The focus of this patent is the attachment point for the free end of the chain. The hook point on the inner faces of the jaws is deep enough to retain the chain.

Arthur C. Fraser & Co. - patent attorneys