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US Patent: 804,433
Wrench
Patentee:
Fred L. Robinson (exact or similar names) - Wayland, NY

USPTO Classifications:
81/101

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. L. Hough
R. A. Boswell
C. B. Zimmerman
G. H. Stannarius

Patent Dates:
Applied: Apr. 01, 1905
Granted: Nov. 14, 1905

Patent Pictures:
Fred L. Robinson patent Nov. 4, 1905
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Description:
The tension spring holds the jaws open; the jaws have pipe gripping faces, and are in parallel alignment when "pull" is applied to the handle which makes the wrench suited for work on nuts as well.

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