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US Patent: 4,472,986
Lever Locking Worm Adjustable Wrench
Robert G. Gottlieb - Overland Park, KS

USPTO Classifications:

Tool Categories:
wrenches : pliers type wrenches : locking pliers
wrenches : wrench adjustment types : screw adjust wrenches




Patent Dates:
Applied: Sep. 29, 1982
Granted: Sep. 25, 1984

Patent Pictures: [ 1 | 2 ]
Robert G. Gottlieb patent Sept. 25, 1984
USPTO pdf tiff
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Adjusting worm for movable jaw mounted in frame attached to toggle locking lever structure. The adjusting worm sets the movable jaw to size, and the toggle-locking mechanism tightens and sets the grip.

From the specifications: "SUMMARY OF THE INVENTION -- In the lever locking worm adjustable wrench of the present invention, the movable jaw is slidably mounted in a guide track formed in the body or handle of the wrench, thereby maintaining a parallel relationship with the fixed jaw. The worm gear is mounted on a mounting arm and is pivoted by action of the operating lever in a direction which is substantially tangential to the rack gear on the movable jaw. The result is a convenient to use, compact, and positively gripping adjustable wrench."

Known example marked "10" STANLEY / 85-610 PAT 4472986 CHINA"

Patents referenced as relevant prior art: 1,181,654, 1,407,528, 1,410,627, 1,503,662, 1,747,360, 2,481,866, 2,524,689, 3,190,154, 3,241,410, 3,608,405, 4,147,077, 4,375,174

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