US Patent: 328,601 - Pipe Wrench


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US Patent: 328,601

Pipe Wrench

Patentee:

George F. Newell - Boston, MA

USPTO Classifications:

81/90.9

Tool Categories:

wrenches : alligator wrenches

Assignees:

George F. Newell - Boston, MA

Stiles Frost - Newton, MA

Manufacturer:

Not known to have been produced

Witnesses:

W. B. Masson

L. C. Hills

Chas. M. Reed

Patent Dates:
Applied:	Sep. 13, 1884
Granted:	Oct. 20, 1885

Patent Pictures:

George F. Newell patent October 30, 1885

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Description:

The set screw adjusts the size of the opening between the jaws, and the lip on the longer jaw transmits extra biting force as force on the handle is increased.