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US Patent: 279,722
Wrench
Patentee:
George W. Davenport - Philadelphia, PA

USPTO Classifications:
81/134, 81/97

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. P. Grant
John A. Wiedersheim
W. F. Kircher

Patent Dates:
Applied: Apr. 28, 1883
Granted: Jun. 19, 1883

Patent Pictures:
George W. Davenport patent June 19, 1883
USPTO pdf tiff
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Description:
The major features of the patent are the adjustment-holding cam in the movable jaw, and the pipe-gripping inset in the face of the movable jaw, together with the means of moving them.

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