Patents by Inventor Robert G. Shires

Robert G. Shires 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).

  • Tire inflation and deflation valve
    Patent number: 4895199
    Abstract: A central tire inflation and deflation system which quickly inflates or deflates tires to any one of a plurality of pressures selected by the vehicle operator. Inflation pressure is greater than the pressure to which the tires are to be inflated. The system uses a tire valve which deflates the tires when a pressure less than the instantaneous tire pressure but greater than a minimum value is applied to the valve. Pressure on rotary seals which connect the tires to the system is relieved when the system is not operating.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: January 23, 1990
    Assignee: Paccar Inc
    Inventors: Roland A. Magnuson, Robert G. Shires
  • Central tire inflation system
    Patent number: 4744399
    Abstract: A central tire inflation and deflation system which quickly inflates or deflates tires to any one of a plurality of pressures selected by the vehicle operator. Inflation pressure is greater than the pressure to which the tires are to be inflated. The system uses a tire valve which deflates the tires when a pressure less than the instantaneous tire pressure but greater than a minimum value is applied to the valve. Pressure on rotary seals which connect the tires to the system is relieved when the system is not operating.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: May 17, 1988
    Assignee: PACCAR Inc.
    Inventors: Rolland A. Magnuson, Robert G. Shires