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US Patent: 382,799
Pipe Wrench
Patentee:
Robert Copland - Eureka, CA

USPTO Classifications:
81/110

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Atlas Pipe Wrench Co. - San Francisco, CA

Witnesses:
Geo. Thorpe
C. E. Doyle
L. B. Kingsbury
J. A. Sinclair

Patent Dates:
Applied: Jan. 18, 1888
Granted: May 15, 1888

Patent Pictures:
Robert Copland Patent May 15, 1888
USPTO pdf tiff
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Description:
The distinctive feature of this hook-jaw pipe wrench is the series of notches forming multiple pivot points for the swinging jaw, and the retaining strap to hold the pivot in the selected notch.

The wrench was updated by Thomas Ryan's Oct. 2, 1900 patent (no. 658,962).

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