Patents by Inventor Kenneth B. Keys

Kenneth B. Keys 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).

  • Air inlet and automatic pressure adjustment device for a tire
    Patent number: 4883107
    Abstract: A dual valve assembly with calibrated or adjustable spring loading that may be attached to a valve stem on a tire to allow slightly over pressuring the tire with air and which then automatically adjusts the pressure in the tire to match a spring loading calibration.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: November 28, 1989
    Inventor: Kenneth B. Keys
  • Air inlet and automatic pressure adjustment device for a tire
    Patent number: 4869306
    Abstract: An air inlet and automatic pressure adjustment assembly comprising a smaller closed ended inner cylinder with a partially common wall with a larger outer cylinder with there being a vent hole in the common cylinder wall and an adjustable spring loaded to close vent valve in the inner cylinder so that excess air pressure opens this valve to vent air from the tire to the outside. The layer outer cylinder contains a normal air inlet valve that will be held closed by inlet air pressure of the tire.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: September 26, 1989
    Inventor: Kenneth B. Keys