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US Patent: 2,645,966
Pipe Wrench With Ratchet-Controlled Movable Jaw
Patentee:
George Dewey Mead - Crows Landing , CA

USPTO Classifications:
81/100

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Basford Manufacturing Company - San Francisco, CA

Witnesses:
non listed

Patent Dates:
Applied: Aug. 27, 1951
Granted: Jul. 21, 1953

Patent Pictures: [ 1 | 2 ]
George D. Mead patent July 21, 1953
USPTO pdf tiff
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Description:
An internal spring-loaded pawl and "one-way" teeth on the shank of the movable jaw close the grip in ratchet fashion; a means to release the pawl extends outside the wrench frame.

Known examples marked GRIPSO-MATIC PIPE WRENCH BASFORD MFG CO SAN FRANCISCO - PATENT PENDING, or with the patent number.

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