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US Patent: 543,665
Pipe Wrench
Patentee:
Edward Wright - Worcester, MA

USPTO Classifications:
81/171, 81/185.1, 81/186, 81/423

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Samuel R. Barton
Simeon E. King
Ella P. Blenus
Chas. H. Burleigh

Patent Dates:
Applied: Dec. 03, 1894
Granted: Jul. 30, 1895

Patent Pictures:
Edward Wright patent July 30, 1895
USPTO pdf tiff
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Description:
Improvement to Wright's October 3, 1893 patent (no. 505,869) to add replaceable toothed gripping surfaces for pipe and rods, and an alternate gripping sleeve for smooth finish pipe. Holes in the adjusting nut allow for insertion of small lever handles, and the action of the lever handle alternately tightens and releases the jaw grip once the size has been set by the screw adjustment.

Production versions of Wright's pipe wrench cite the October 3, 1893 patent.

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