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US Patent: 114,348
Improvement in Pipe-Wrenches
Improved Pipe-Hook
Patentee:
Eugene H. Robbins - Pittsfield, MA

USPTO Classifications:
81/68

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches

Assignees:
None

Manufacturer:
Robbins, Gamwell and Co. - Pittsfield, MA
Rice & Robbins - Pittsfield, MA

Witnesses:
W. W. Gamwell
E. N. Robbins
Wm. H. C. Smith
A. Bennernendorf

Patent Dates:
Granted: May 02, 1871

Patent Pictures:
Eugene A. Robbins Pat. May 2, 1871
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Description:
Early chain pipe wrench; kept in production over several decades. Ken Cope's "American Wrench Makers 1830-1930" identifies the history of production and distribution, citing ads from various hardware trade periodicals.

This patent is referenced in M. T. Chapman's March 7, 1882 patent (no. 254,460).

An improvement patented on July 31, 1882 (pat. no. 282,372) is not known to have been used.

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