US Patent: 222,787 - Adjustable Wrench


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US Patent: 222,787

Adjustable Wrench

Patentee:

Seth E. Hurlbut (exact or similar names) - 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:

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

Patent Pictures:

Seth E. Hurlbut patent Dec. 23, 1879

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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.