US Patent: 482,527 - Pipe Wrench


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US Patent: 482,527

Pipe Wrench

Patentee:

Daniel R. Porter (exact or similar names) - Chelsea, MA

USPTO Classifications:

81/103, 81/175

Tool Categories:

wrenches : wrench adjustment types : screw adjust wrenches

wrenches : pipe wrenches

Assignees:

Columbian Manufacturing Co. - Brockton, MA

Manufacturer:

Columbian Manufacturing Co. - Brockton, MA

True Manufacturing Co. - Brockton, MA

Witnesses:

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

Patent Pictures: [ 1 | 2 ]

Daniel R. Porter patent September 13, 1892

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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.