Patents by Inventor Randal Whitmer

Randal Whitmer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Clutch booster control valve system
    Patent number: 4871051
    Abstract: A clutch booster control system having parallel booster cylinder and a control valve, the booster cylinder having an extendible rod and being operatively connected between the vehicle frame and the clutch operating lever, the control valve having a slidable piston and being connected between the clutch operating lever and the pedal linkage. Movement of the clutch pedal moves the control valve piston to provide air to the booster cylinder for operating the clutch operating lever.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: October 3, 1989
    Assignee: Paccar Inc.
    Inventor: Randal Whitmer