Calvin C Litchfield

US Patent:

20060060034, Mar 23, 2006

Filed:

Sep 22, 2004

Appl. No.:

10/947125

Inventors:

Calvin Litchfield - Elk Grove CA, US

International Classification:

B25B 13/12

US Classification:

081127000, 081129000

Abstract:

An open-end self-adjusting wrench for use in grasping objects includes a jaw assembly having two slidably opposing jaws. A first jaw has an object gripping surface that extends into an aperture containing base. The aperture within the base includes two regions: a receiving channel proximate to the object gripping surface and a receiving slot distal to the object gripping surface. A second jaw has another object gripping surface and a toothed rail slidably mated within the receiving channel to produce object grasping alignment of the two gripping surfaces. Pivotally secured within the receiving slot is an elongated handle with a grasping region at one end and a toothed radial perimeter at the other end. The toothed rail and the toothed radial perimeter mesh to produce an object grasping force on the object between the opposing object grasping surfaces when appropriate force is exerted on the elongated handle grasping region.