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US Patent: 501,177
Wrench and Rod Vise
Patentee:
John J. Wulff - Blair, NE

USPTO Classifications:
81/119, 81/164, 81/175, 81/185

Tool Categories:
wrenches

Assignees:
John J. Wulff - Blair, NE
Truman J. Stevens - Blair, NE

Manufacturer:
Unknown

Witnesses:
A. J. Taylor
J. S. Roberts
J. E. Ketchmark
J. F. Burcham

Patent Dates:
Applied: Nov. 14, 1892
Granted: Jul. 11, 1893

Patent Pictures:
John J. Wulff Pat. July 11, 1893
USPTO pdf tiff
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Description:
The patent is for the slot and set screw combination which creates a wrench or holding clamp for well pump-rod. Known examples of the tool appear as "stand-alone" and as the "handle" end of a malleable iron "implement wrench."

Corresponding Canadian patent no. CA-46,668 was issued July 26, 1894.

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