Abstract: A method of operating a clamp (100) that includes a first clamping jaw (102), a support element (104) to which the first clamping jaw is attached and a trigger handle (118) pivotably mounted to a clamp body (112). 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.
Type:
Application
Filed:
March 4, 2014
Publication date:
July 3, 2014
Applicant:
Irwin Industrial Tool Company, Inc.
Inventors:
Chris W. Cicenas, Charles R. McKean, Thomas M. Chervenak, Anthony B. Fuller
Abstract: A method of operating a clamp (100) that includes a first clamping jaw (102), a support element (104) to which the first clamping jaw is attached and a trigger handle (118) pivotably mounted to a clamp body (112). 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.
Type:
Grant
Filed:
September 12, 2011
Date of Patent:
April 22, 2014
Assignee:
Irwin Industrial Tool Company, Inc.
Inventors:
Chris W. Cicenas, Charles R. McKean, Thomas M. Chervenak, Anthony B. Fuller
Abstract: The self-adjusting locking pliers include a fixed assembly having a fixed jaw supported at one end. A moveable jaw is pivotably supported on the fixed assembly at a slidable pivot connection. The slidable pivot connection includes a pawl provided with teeth. A rack of teeth includes first and second sets of teeth offset from one another by ½ of the pitch that may each be engaged by the teeth formed on pawl. A lever is attached to the fixed assembly and a linkage transmits a force applied to the lever to the jaws and locks the jaws in the clamping position. The linkage allows the angle between the links to be preset to thereby control the clamping force applied to the work piece. The movable jaw is selectively attached to the linkage in one of two positions such that the jaw span may be adjusted without affecting the geometry of the linkage.
Abstract: A method of operating a clamp (100) that includes a first clamping jaw (102), a support element (104) to which the first clamping jaw is attached and a trigger handle (118) pivotably mounted to a clamp body (112). 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.
Type:
Application
Filed:
September 12, 2011
Publication date:
December 29, 2011
Applicant:
IRWIN INDUSTRIAL TOOL COMPANY, INC.
Inventors:
Chris W. Cicenas, Charles R. McKean, Thomas M. Chervenak, Anthony B. Fuller
Abstract: A method of operating a clamp (100) that includes a first clamping jaw (102), a support element (104) to which the first clamping jaw is attached and a trigger handle (118) pivotably mounted to a clamp body (112). 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.
Type:
Application
Filed:
March 1, 2010
Publication date:
June 24, 2010
Applicant:
IRWIN INDUSTRIAL TOOL COMPANY, INC.
Inventors:
Chris W. Cicenas, Charles R. McKean, Thomas M. Chervenak, Anthony B. Fuller