US Patent: 588,906 - Monkey Wrench


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US Patent: 588,906

Monkey Wrench

Patentees:

Charles H. Harvey (exact or similar names) - Philadelphia, PA

Marmer Duke Archer (exact or similar names) - Philadelphia, PA

USPTO Classifications:

81/170

Tool Categories:

wrenches : wrench adjustment types : screw adjust wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Feb. 03, 1897
Granted:	Aug. 24, 1897

Patent Pictures:

Charles H. Harvey and Marmer Duke Archer patent August 24, 1897

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Description:

The adjustable jaw is moved by a screw-threaded shaft that extends the length of the wrench with a knob at the end of the handle. The shaft is semi-enclosed in a recess in the back of the main shank.

The inner portion of the movable jaw has an opening corresponding to the cross-section of the main shank.