US Patent: 1,355,470 - Pipe Wrench


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US Patent: 1,355,470

Pipe Wrench

Patentee:

James H. Hall (exact or similar names) - Rupert, ID

USPTO Classifications:

81/179, 81/319, 81/322, 81/418

Tool Categories:

wrenches : pipe wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

R. E. Rousseau

C. G. Trainer

Patent Dates:
Applied:	Mar. 06, 1920
Granted:	Oct. 12, 1920

Patent Pictures:

James H. Hall patent October 12, 1920

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Description:

The two sides of the wrench are hinged at the end of the handle. Both jaw faces have teeth to grip pipe. One jaw face slides on a series of ball bearings, and is drawn back by a compression spring. The width of the opening is adjusted by a spring-loaded toothed lever that engages a transverse rack.