US Patent: 885,322 - Pipe Wrench


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US Patent: 885,322

Pipe Wrench

Patentee:

James M. Cochran (exact or similar names) - Paducah, KY

USPTO Classifications:

81/104

Tool Categories:

wrenches : pipe wrenches

Assignees:

None

Manufacturer:

Cochran Pipe Wrench Mfg. Co. - Chicago, IL

Witnesses:

Stephen French

G. A. Curry

Patent Dates:
Applied:	Sep. 12, 1907
Granted:	Apr. 21, 1908

Patent Pictures: [ 1 | 2 | 3 ]

James A. Cochran Pat. April 21, 1908

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Description:

The pivoting angle piece forming the bearing for the adjusting knurl is the distinctive feature of the Cochran pipe wrench. It is an improvement on Cochran's January 25, 1898 patent (no. 597,762). It received further refinement in patent no. 1,071,703.

Detailed research shows the earliest COCHRAN pipe wrenches were produced by Kilborn & Bishop at New Haven, CT until Cochran could build their own plant in Chicago.