US Patent: 221,633 - Pipe-Wrench


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US Patent: 221,633

Pipe-Wrench

Patentee:

John H. Vinton (exact or similar names) - Bridgeport, CT

USPTO Classifications:

81/108, 81/164

Tool Categories:

wrenches : wrench components : wrench handle components

wrenches : pipe wrenches

Assignees:

Frank Armstrong - Bridgeport, CT

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Oct. 23, 1878
Granted:	Nov. 11, 1879

Patent Pictures:

John H. Vinton patent November 11, 1879

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Description:

The handle screws in and out to adjust the "fixed" jaw. That jaw is held tight against the handle by an internal coil spring. The hook jaw has a stop to prevent its swinging back against the handle.