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US Patent: 222,484
Pipe-Wrench
Improvement in Pipe-Wrenches
Patentee:
Dan P. Foster - Waltham, MA

USPTO Classifications:
81/176, 81/356, 81/359, 81/396

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Louis V. Foster
Elliot A. Harrington

Patent Dates:
Applied: May 16, 1879
Granted: Dec. 09, 1879

Patent Pictures:
Dan P. Foster patent Dec. 9, 1879
USPTO pdf tiff
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Description:
The patent is for a cam-lever action, knurl adjust pipe wrench. This patent along with Frank Armstrong's March 27, 1883 patent (No. 274,544) is the basis for a pipe wrench produced by the Armstrong Company of Bridgeport, CT.

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