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US Patent: 538,166
Wrench
Patentee:
Jonathan A. Hunt - Westborough, MA

USPTO Classifications:
81/176, 81/356, 81/361, 81/396

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches
wrenches : wrench adjustment types : auxiliary levers on wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. F. Schmelz
Mary J. Galvin
J. C. Dewey

Patent Dates:
Applied: Aug. 24, 1894
Granted: Apr. 23, 1895

Patent Pictures:
Jonathan A. Hunt patent April 23, 1895
USPTO pdf tiff
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Description:
The patent inserts a clamping cam lever into the action of a screw-adjust nut wrench to tighten the overall grip of the jaws.

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