Irwin-Industrial Tool Company

Charles R McKean

Chris W Cicenas

Thomas M Chervenak

Anthony B Fuller

A method of operating a clamp () that includes a first clamping jaw (), a support element () to which the first clamping jaw is attached and a trigger handle () pivotably mounted to a clamp body (). The method includes actuating the trigger handle causing the first clamping jaw to experience incremental motion and varying the incremental motion as a function of a load encountered by the support element by varying an effective lever arm of the trigger handle by moving a fulcrum point into contact or out of contact with the trigger handle based on the load.

Increased and variable force and multi-speed clamps

A method of operating a clamp that includes a first clamping jaw, a support element to which the first clamping jaw is attached and a trigger handle pivotably mounted to a clamp body. The method includes actuating the trigger handle causing the first clamping jaw to experience incremental motion and varying the incremental motion as a function of a load encountered by the support element by varying an effective lever arm of the trigger handle by moving a fulcrum point into contact or out of contact with the trigger handle based on the load.

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Mount Vernon, OH, United States of America

Charles R McKean