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US Patent: 241,674
Pipe Wrench
Wladyslaw T. Kosinski - Brooklyn, NY

USPTO Classifications:
192/80, 81/68, 81/69

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

Wladyslaw T. Kosinski - Brooklyn, NY
Anthony Odasz - Brooklyn, NY
William C. Bowers - Brooklyn, NY

Not known to have been produced

W. Colborne Brooks
Charles C. Stetson
Chr. Goetz
F. Kirchner

Patent Dates:
Applied: Dec. 20, 1880
Granted: May 17, 1881

Patent Pictures:
W. T. Kosinski patent May 17, 1881
USPTO pdf tiff
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The chain lengths are sized so that the "wrap" of the chain corresponds to the circumference of the pipe. There are a couple of holes for the retaining pin to allow for slight variations in pipe circumference. There is an alternative bearing surface included in the overall patent.

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