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US Patent: 1,634,908
Wrench
Patentees:
Earnest E. Lynch - Turlock, CA
Homer A. Mead - Turlock, CA

USPTO Classifications:
81/99

Tool Categories:
wrenches : nut wrenches
wrenches : wrench adjustment types : self-adjust wrenches
wrenches : wrench components : wrench jaw components

Assignees:
Masterench Corporation - Turlock, CA

Manufacturer:
Masterench Corporation - Turlock, CA

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 03, 1924
Granted: Jul. 05, 1927

Patent Pictures:
E.A. Lynch and H.A. Mead Pat. July 5, 1927
USPTO pdf tiff
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Description:
The movable jaw of the self-adjusting wrench is shaped so the the wrench will contact four sides of a hexagonal nut for all the sizes within its range. If the jaw surfaces have teeth, the wrench will turn pipe or other round objects. A spring holds the jaw in the closed position.

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