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US Patent: 238,369
Wrench
Patentee:
Bernard Donohue - Yonkers, NY

USPTO Classifications:
81/97

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Tower and Lyon - New York, NY
Union Hardware Co. - Torrington, CT

Witnesses:
J. A. Rutherford
J. Henry Kaiser

Patent Dates:
Applied: Nov. 22, 1880
Granted: Mar. 01, 1881

Patent Pictures:
Bernard Donohue Pat. March 1, 1881
USPTO pdf tiff
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Description:
The patent's focus is the "T" shaped jaw which swings out from the base of the movable jaw frame. Combination pipe and nut wrenches using this patent feature are known. It was applied to wrenches based on Donohue's Sept. 25, 1877 patent (no. 195,589). Later patents including Donohue's Dec. 12, 1882 (no. 268,784), and Nov. 12, 1889 (no. D19,412) culminated in the Tower & Lyon "ENGINEER'S" combination pipe and nut wrench.

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