Patents by Inventor David Robert Worpell

David Robert Worpell 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).

  • DISABLE CONTROL FOR FOUR WHEEL STEER VEHICLE
    Publication number: 20020185328
    Abstract: A disable control system for a four-wheel steer vehicle disables rear-wheel steer capability when desired. The rear-wheel steer mechanism is responsive to, and at a fractional proportion of, the front wheel steering as a function of vehicle speed. The disable function operates in the dual, i.e. both front and rear steering mode only. The vehicle also includes a normal user selectable single steering mode, wherein only the front wheels are capable of being steered. Upon disablement of the rear wheel steering response, the control system automatically switches to the single steering mode, thus returning the rear wheels to a centered, zero steer angle, position.
    Type: Application
    Filed: June 7, 2001
    Publication date: December 12, 2002
    Inventors: David Robert Worpell, David Merglewski
  • Disable control for four wheel steer vehicle
    Patent number: 6488113
    Abstract: A disable control system for a four-wheel steer vehicle disables rear-wheel steer capability when desired. The rear-wheel steer mechanism is responsive to, and at a fractional proportion of, the front wheel steering as a function of vehicle speed. The disable function operates in the dual, i.e. both front and rear steering mode only. The vehicle also includes a normal user selectable single steering mode, wherein only the front wheels are capable of being steered. Upon disablement of the rear wheel steering response, the control system automatically switches to the single steering mode, thus returning the rear wheels to a centered, zero steer angle, position.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: December 3, 2002
    Assignee: General Motors Corporation
    Inventors: David Robert Worpell, David Merglewski