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US Patent: 347,580
Wrench
Patentee:
James B. Dean - Stockton, NJ

USPTO Classifications:
81/137, 81/328, 81/355, D8/22

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. Sedgwick
Donn Twitchell
James J. Smith
Samuel E. Diamond

Patent Dates:
Applied: Feb. 05, 1886
Granted: Aug. 17, 1886

Patent Pictures:
James B. Dean patent August 17, 1886
USPTO pdf tiff
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Description:
A cam-lever base of the lower jaw latches into notches in the shank. In the pipe wrench version, a lever handle attached to that base tightens the hook jaw.

Ken Cope's "American Wrench Makers 1830-1930" cites an 1895 "Scientific American" listing announcing these wrenches to the trade.

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