US Patent: 432,409


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US Patent: 432,409

Wrench

Patentee:

John Hull (exact or similar names) - Elkhart, IN

USPTO Classifications:

81/100, 81/129.5

Tool Categories:

wrenches : wrench adjustment types : quick adjust wrenches

Assignees:

John Hull - Elkhart, IN

Zachariah Robinson - Elkhart, IN

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Nov. 04, 1889
Granted:	Jul. 15, 1890

Patent Pictures:

John Hull patent July 15, 1890

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Description:

Quick-adjust nut wrench with a sliding jaw having rack teeth on the inner edge of the shank. The jaw slides through an opening in the shank. The back lip of this opening has a single tooth-like spur, and the opening allows the sliding jaw to rock back. A leaf spring holds the movable jaw against the spur. This construction allows the jaw to "ratchet" on square nuts.