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US Patent: 283,378
Pipe Wrench
Patentee:
George W. Cook - Chicago, IL

USPTO Classifications:
81/185.1, 81/99

Tool Categories:
wrenches : wrench components : pipe jaw attachments for wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. E. Gaylord
Wm. M. Thexton
Geo. H. Hartman

Patent Dates:
Applied: Mar. 24, 1883
Granted: Aug. 21, 1883

Patent Pictures:
George W. Cook patent August 21, 1883
USPTO pdf tiff
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Description:
The patented piece is the pipe gripping attachment for a modified monkey wrench. The wrench head has to have notches and holes. The jaw attachment has a swinging gripper, with a spring to hold it in contact with the work piece.

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