US Patent: 486,697


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US Patent: 486,697

Wrench

Patentee:

Andrew J. Curtis (exact or similar names) - East Williamson, NY

USPTO Classifications:

81/134, 81/154, 81/95

Tool Categories:

wrenches : wrench adjustment types : quick adjust wrenches

Assignees:

Andrew J. Curtis - East Williamson, NY

Harvey H. Pound - East Williamson, NY

William Pound - East Williamson, NY

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	May 31, 1892
Granted:	Nov. 22, 1892

Patent Pictures:

Andrew J. Curtis patent November 22, 1892

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Description:

A cam lever and tapered section of the shank combine to form a wrench adjustment that can easily be tightened by sliding the movable jaw. The cam lever has to be shifted to relax its grip to loosen the jaws.