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US Patent: 228,707
Pipe-Wrench
Wrench Adapted To Grasping Cylindrical Bodies
Patentee:
William C. Westerfield - Chicago, IL

USPTO Classifications:
81/90.4

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

Assignees:
William C. Westerfield - Chicago, IL
Frederick F. Elmendorf - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
L. B. Coupland
Edwin Blackman
R. E. Miller
F. B. Townsend

Patent Dates:
Applied: Apr. 21, 1880
Granted: Jun. 08, 1880

Patent Pictures:
William C. Westerfield patent June 8, 1880
USPTO pdf tiff
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Description:
Two solid curved links and a chain-link like open link form a gripping loop. Several notches in the shank provide size adjustment. A pivoting flat spring forms a "latch" to hold the open link in the selected notch.

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