Patents by Inventor David T. Ayers, Jr.

David T. Ayers, Jr. 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).

  • Proportioning brake control device with bypass
    Patent number: 3937523
    Abstract: A device for varying the proportion of brake pressure delivered to the front and rear brakes of a vehicle, and including a differential area piston for decreasing the proportion delivered to the rear brakes between the first and second inlet pressures, and an additional valve assembly actuatable in response to a predetermined pressure differential between the fluid pressure delivered to the piston and the fluid pressure delivered thereby to the rear brakes so as to establish a decreasing pressure differential between the pressure delivered to the front and rear brakes.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: February 10, 1976
    Assignee: Kelsey-Hayes Company
    Inventors: David T. Ayers, Jr., Roger E. Doerfler, William Stelzer