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US Patent: 454,893
Pipe-Wrench
Patentee:
John E. Wakefield - Worcester, MA

USPTO Classifications:
81/184, 81/185.1, 81/362, 81/423, 81/437

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

Assignees:
None

Manufacturer:
J. E. Wakefield - Worcester, MA
Wakefield Wrench Co. - Worcester, MA

Witnesses:
H. M. Fowler
Walter S. Bowen
Rufus B. Fowler

Patent Dates:
Applied: Nov. 26, 1890
Granted: Jun. 30, 1891

Patent Pictures: [ 1 | 2 ]
J. E. Wakefield Pat. June 30, 1891
USPTO pdf tiff
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Description:
The sliding grip piece can be shifted when the handles are fully opened. As the handles close, the grip piece engages the rack on the back of the main shank, and the movable jaw grip tightens. The retractable screwdriver on the end of the handle in the patent drawing has not been observed on any known examples.

Compare this one to Wakefield's August 27, 1895 patent (no. 545,323).

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