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US Patent: 444,171
Theodore F. Vandegrift - Shelbyville, IN

USPTO Classifications:
279/44, 81/116

Tool Categories:
wrenches : wrench adjustment types : wedge adjust wrenches

Vandegrift Manufacturing Co. - Shelbyville, IN

Vandegrift Manufacturing Co. - Shelbyville, IN

James Walsh
Chester Bradford
F. Dean Rhodes

Patent Dates:
Applied: Jan. 02, 1890
Granted: Jan. 06, 1891

Patent Pictures: [ 1 | 2 | 3 ]
T.F. Vandegrift Pat. Jan. 6, 1891
USPTO pdf tiff
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A spring holds the jaws open. A sliding wedge on the movable jaw and a yoke pivoting from the fixed jaw provide the adjusting means. The patent was realized as malleable iron nut or pipe wrenches.

Vandegrift received another patent for a different quick-adjusting pipe wrench a week later (pat. no. 444,511).

For another take on wedge-adjusting wrench jaws, see patent no. 753,915.

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