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US Patent: 361,579
Pipe Wrench
Patentees:
John C. Degnan (exact or similar names) - Middletown, NY
Charles A.. Bennett (exact or similar names) - Middletown, NY

USPTO Classifications:
81/100, 81/135

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
M. Redman
F. G. Fischer
Geo. M. Bush
J. P. Crans

Patent Dates:
Applied: Feb. 07, 1887
Granted: Apr. 19, 1887

Patent Pictures:
John C. Degnan and Charles A. Bennett patent April 19, 1887
USPTO (New site tip)
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Description:
The swinging hook jaw has rack teeth on its "shank" portion, with a spring-loaded dog engaging those teeth to hold the adjustment when the jaw is in pipe-gripping position.

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