US Patent: 231,831 - Self-Adjusting Wrench


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US Patent: 231,831

Wrench
Self-Adjusting Wrench

Patentees:

James Albin Mell (exact or similar names) - Moline, MI

Wesley Wortenbe (exact or similar names) - Moline, MI

USPTO Classifications:

81/90.2

Tool Categories:

wrenches : wrench adjustment types : self-adjust wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	May 28, 1880
Granted:	Aug. 31, 1880

Patent Pictures:

J. A. Mell and W. Wortenbe patent August 31, 1880

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Description:

A lobe on the handle beyond the pivot point pushes on one jaw to close the pair of jaws. A cam on the opposite side of the handle at the pivot point opens the jaws.