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US Patent: 280,793
Pipe Wrench
Patentee:
A. Wells Case - South Manchester, CT

USPTO Classifications:
81/120, 81/186

Tool Categories:
wrenches : alligator wrenches

Assignees:
None

Manufacturer:
American Saw Co. - Trenton, NJ

Witnesses:
Edwin F. Dimock
W. M. Bjoerkman
Chas. L. Burdett

Patent Dates:
Applied: May 31, 1883
Granted: Jul. 10, 1883

Patent Pictures:
A. Wells Case patent July 10, 1883
USPTO pdf tiff
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Description:
The wrench is a variant of the alligator wrench, with the toothed jaw face curved. This curvature makes the gripping edge of the teeth tangential to pipe circumference throughout the size range of the wrench.

Comparable Canadian patent no. CA-17,229 gives the patentee's name as Alfred W. Case.

The AMERICAN SAW Co. of Trenton, NJ produced this design as the FALCON PIPE WRENCH. A known example includes the patent date in the markings.

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