US Patent: 421,688 - Pipe Wrench


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US Patent: 421,688

Pipe Wrench

Patentee:

Thomas White Fisher (exact or similar names) - Helena, MT

USPTO Classifications:

81/126, 81/140, 81/177.7, 81/DIG.4

Tool Categories:

wrenches : pipe wrenches

Assignees:

None

Manufacturer:

Unknown

Witnesses:

Patent Dates:
Applied:	Mar. 18, 1889
Granted:	Feb. 18, 1890

Patent Pictures: [ 1 | 2 ]

Thomas White Fisher patent February 18, 1890

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Description:

Major adjustment accomplished by pawl in movable jaw, final adjustment and gripping action by the rocking action of the handle moving the shank portion containing the rack teeth.

Ken Cope's "American Wrench Makers 1830-1930" notes a new product announcement in "Scientific American," and a 12-inch example is known.

Munn & Co.- patent attorneys; CA-33,864 and GB-189002639 are corresponding "foreign" patents.