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US Patent: 139,520
Improvement in Pipe-Wrenches
Improved Adjustable Pipe Wrench
Patentee:
John Rigg - Cleveland, OH

USPTO Classifications:
81/392

Tool Categories:
wrenches : pliers type wrenches
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Hull & Belden Co. - Danbury, CT

Witnesses:
D. Stephens
George W. Tibbitts

Patent Dates:
Applied: Apr. 04, 1873
Granted: Jun. 03, 1873

Patent Pictures: [ 1 | 2 ]
John Rigg Pat. June 3, 1873
USPTO pdf tiff
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Description:
One curved jaw can be adjusted in relation to the handle to fit a variety of pipe sizes. The adjustment is accomplished by studs on the handle member engaging pairs of holes in the jaw member. The central pivot bolt has a wing nut to allow the wrench to be taken apart and put back together.

Marketed as the CLIMAX pipe wrench.

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