Patents by Inventor Frederick D. Keady

Frederick D. Keady 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).

  • Brake booster for motor vehicle fluid power circuit
    Patent number: 3951043
    Abstract: A motor vehicle fluid power circuit is disclosed which includes a constant displacement pump driven by the engine of the vehicle, a control valve, an open center steering valve, a brake booster accumulator, and a closed center brake booster. The entire output of the pump flows through the control valve under all conditions, and the control valve selectively directs the pump output to the steering valve to assist in steering the vehicle or to the brake booster accumulator (which is hydraulically connected to the brake booster) to assist in braking.
    Type: Grant
    Filed: May 6, 1974
    Date of Patent: April 20, 1976
    Assignee: The Weatherhead Company
    Inventor: Frederick D. Keady