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US Patent: 4,375,174
Adjustable End Wrench Releasable Locking Feature
Stephen E. Shanley, Jr. - Grosse Ile, MI

USPTO Classifications:
81/165, 81/315, 81/362

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches

Shan-Lok Corporation - Grosse Ile, MI

Tru-Grip Tool Company - unk., Taiwan


Patent Dates:
Applied: Aug. 24, 1981
Granted: Mar. 01, 1983

Patent Pictures:
Stephen E. Shanley Jr. Pat. March 1, 1983
USPTO pdf tiff
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The patent is for a lever handle and linkage which tightens and can lock the grip of of the movable jaw on a "Crescent" type adjustable end wrench. Distributed as the "Tru-Grip Wrench."

The patents cited are: 599,379, 1,403,334, 1,490,903, 1,506,362, 1,771,692, 2,539,852, 3,190,154, and 3,333,492.

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