Patents by Inventor Frederick J. Knight

Frederick J. Knight 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).

  • Anti-skid vehicle braking systems
    Patent number: 4193643
    Abstract: In a fluid-pressure operated anti-skid braking system operation of a control valve is controlled by a force of which the magnitude is determined by utilization of the pressure in a memory chamber defined between a pair of relatively movable spaced pistons. The piston carries a head which forms part of the valve, and the other piston is exposed to an operator-controlled pressure from an inlet passage.
    Type: Grant
    Filed: July 13, 1978
    Date of Patent: March 18, 1980
    Assignee: Girling Limited
    Inventor: Frederick J. Knight