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US Patent: 482,527
Pipe Wrench
Patentee:
Daniel R. Porter - Chelsea, MA

USPTO Classifications:
81/103, 81/175

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

Assignees:
Columbian Manufacturing Company - Brockton, MA

Manufacturer:
Columbian Manufacturing Company - Brockton, MA
True Manufacturing Company - Brockton, MA

Witnesses:
Jonathan Tilley
A. D. Grover
Arthur W. Crossley
Ronte Forwitz

Patent Dates:
Applied: May 16, 1892
Granted: Sep. 13, 1892

Patent Pictures: [ 1 | 2 ]
Daniel R. Porter patent September 13, 1892
USPTO pdf tiff
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Description:
The adjusting screw is in the rocking frame that holds the movable jaw. Produced as the COLUMBIAN pipe wrench.

True Mfg. produced five-inch long versions as the COLUMBIA BABY bicycle or pocket wrench with tire iron handle end and smooth or pipe jaws; a nominal 6-inch smooth jaw COLUMBIAN WRENCH produced by the Columbian Mfg. Co. is also known.

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