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US Patent: 55,578
Improvement in Pipe-Wrenches
Patentee:
Durfee W. Coggeshall - Providence, RI

USPTO Classifications:
81/64

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

Assignees:
George E. Church - Providence, RI

Manufacturer:
Not known to have been produced

Witnesses:
Henry Martin
Albert M. Hewitt

Patent Dates:
Granted: Jun. 12, 1866

Patent Pictures:
D. W. Coggeshall Pat. June 12, 1866
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Description:
Two thin flexible jaws hinged together, fastened to the handle at one end, and with a hook provision at the other, form a gripping loop when the handle is moved. The description notes this type of grip would not abrade or jam on pipe. The description notes the similarity of this action to strap or band type braking systems. This is the first "strap" type pipe wrench patent. It has no provision for accomodating multiple sizes of pipe.

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