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US Patent: 173,845
Pipe-Wrench
Patentee:
Edward. Gosford Clinch - Saint John, NB Canada

USPTO Classifications:
81/117

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Unknown

Witnesses:
E. Wolff
J. Goethals
Chas. F. Clinch
Charles M. Bostwick

Patent Dates:
Applied: Jan. 15, 1876
Granted: Feb. 22, 1876

Patent Pictures:
Edward G. Clinch Pat. February 22, 1876
USPTO pdf tiff
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Description:
The frame is a parallelogram with the connecting links "mortised" into the shank and secondary jaw; the teeth face each other.

Clinch secured parallel Canadian patent CA-5,874 on March 24, 1876.

The U.S. patent date appears on an ELLRICH GRIP parallelogram pipe wrench. Its connecting links are "outside" the shank and secondary jaw as shown in the July 12, 1887 Philips patent (no. 366,246).

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