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US Patent: 2,076,830
Pipe Wrench
Patentee:
William O. Thewes - Cleveland, OH

USPTO Classifications:
81/105

Tool Categories:
wrenches : pipe wrenches

Assignees:
Ridge Tool Co. - North Ridgeville, OH

Manufacturer:
Ridge Tool Co. - North Ridgeville, OH

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 26, 1934
Granted: Apr. 13, 1937

Patent Pictures:
William O. Thewes Patent April 13, 1937, with IMPROVED STILLSON
USPTO pdf tiff
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Description:
The patent replaces leaf springs with conical compression coil springs to provide the "centering" function for the frame of a Stillson type pipe wrench.

Photo of known example marked "IMPROVED STILLSON / PAT. NO. 2076830" supplied by Sam Spector.

The original application was divided, and resulted in this patent and no. 2,051,755, issued Aug. 18, 1936.

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