Patent ID: 7721630
Filing Date: 2010-05-25
Classification: B25B

Abstract:
1. An adjustable locking pliers, comprising: a main body having a first jaw which is fixed in relation thereto, and a movable jaw pivotably attached to said main body by a middle lever; and a workpiece locking mechanism means comprising a locking rod having longitudinal grooves thereabout, the locking rod being biased towards said jaws and slidably received within a tapered chamber containing elements disposed partially in the grooves and disposed to bear against tapered tightening walls extending about and defining the tapered chamber, wherein said elements comprise bearings contained in a trapezoidal chamber tapered downwardly away from the jaw end of said pliers, said bearings being biased towards the smaller end of said chamber by a spring, such that the locking rod will be locked in a position in the chamber by immobilization of the elements thereagainst, and slidably released by mobilization of the elements, said rod in contact with one end of said middle lever, wherein said locking rod may be released by movement of a piece in contact therewith.