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US Patent: 222,787
Adjustable Wrench
Patentee:
Seth E. Hurlbut - Chicago, IL

USPTO Classifications:
219/90, 81/356, 81/363, 81/404

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. H. Adams
J. F. Bruns
J. K. Rogers
W. N., Bruner

Patent Dates:
Applied: May 24, 1879
Granted: Dec. 23, 1879

Patent Pictures:
Seth E. Hurlbut patent Dec. 23, 1879
USPTO pdf tiff
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Description:
An extended adjustable head includes a pair of double-lever fold-out subsidiary handles. Squeezing them tightens the jaw grip. There is a spring at the hinge point of the double levers to open them outward and relax the wrench's grip.

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