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US Patent: 482,198
Wrench
Improvement in Pipe-Wrenches
Patentee:
John Ryan (exact or similar names) - New York, NY

USPTO Classifications:
81/128, 81/129, 81/144

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. Walker
C. Sedgwick
E. M. Clark
F. W. Hanaford
Patent Dates:
Applied: Jul. 13, 1892
Granted: Sep. 06, 1892

Patent Pictures:
John Ryan patent September 6, 1892
USPTO (New site tip)
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Description:
A threaded pin engages and retracts a locking plate to set the adjustment.

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