US Patent: 332,191 - Pipe Wrench


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US Patent: 332,191

Pipe Wrench

Patentee:

Charles L. Dunham (exact or similar names) - Union City, PA

USPTO Classifications:

81/90.5

Tool Categories:

wrenches : pipe wrenches : chain and strap wrenches

Assignees:

Emma G. Diefendorf - Union City, PA

Charles L. Dunham - Union City, PA

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Oct. 31, 1885
Granted:	Dec. 08, 1885

Patent Pictures:

Charles L. Dunham patent December 8, 1885

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Description:

The link sections of the gripping jaw have limited motion; they open far enough to slip around pipe. Teeth on the handle grip teeth on the outer side of the end of the gripping jaw to tighten the grip.