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US Patent: 455,183
Wrench
Patentee:
James Dushane - South Bend, IN

USPTO Classifications:
81/356, 81/363, 81/389, 81/427

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. R. Mansfield
O. W. Seville
Rufus Romine
Jeanie Anderson

Patent Dates:
Applied: Nov. 22, 1890
Granted: Jun. 30, 1891

Patent Pictures:
James Du Shane patent June 30, 1891
USPTO pdf tiff
Google Patents
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Description:
Screw adjust nut wrench with lever handle and toggle linkage to provide extra jaw movement to tighten the grip. The lever linkage may include springs to open the jaws when the grip on the lever handle is relaxed.

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