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US Patent: 599,334
Wrench
Patentees:
William A Humphrey - Barron, WI
Otto D. Kahl - Barron, WI

USPTO Classifications:
81/140, 81/98

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. A. Coe
F. B. Kinsley
John F. DenHorwill

Patent Dates:
Applied: Aug. 31, 1897
Granted: Feb. 22, 1898

Patent Pictures:
William A. Humphrey and Otto D. Kahl patent February 22, 1898
USPTO pdf tiff
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Description:
Swinging hook jaw combined with a movable jaw that has a spring-loaded pawl engaging teeth on a rack on the main shank. For some applications, the hook jaw and main shank can operate as a wrench without the presence of the movable jaw.

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