US Patent: 425,371 - Pipe Wrench


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US Patent: 425,371

Pipe Wrench

Patentee:

Andrew J. Curtis - Monroe, ME

USPTO Classifications:

81/118

Tool Categories:

wrenches : pipe wrenches

Assignees:

Andrew J. Curtis - Monroe, ME

John H. Gordon - Brooks, ME

Manufacturer:

American Saw Co. - Trenton, NJ

Witnesses:

Patent Dates:
Applied:	Mar. 05, 1889
Granted:	Apr. 08, 1890

Patent Pictures: [ 1 | 2 | 3 ]

Andrew J. Curtis Pat. April 8, 1890

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Description:

The jaws are held "open" by a spring between the sliding pivot point and the adjusting bolt. The action is similar to alligator wrenches of the period. The selling point was the ability to grip at the tip of the jaws and reach into tight quarters.