Patents by Inventor Eric William Richmond

Eric William Richmond 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).

  • Truck and trailer braking systems
    Patent number: 4078844
    Abstract: An air brake system for truck and trailer combinations comprises a vehicle load sensing valve in the rear wheel brake line of the truck, a truck-mounted relay valve incorporating a piston or piston assembly responsive to truck braking pressures and adapted to actuate valve means to control delivery of pressure to the seervice brake line, and an additional piston, piston assembly or piston/diaphragm assembly in the relay valve which also actuates the valve means and which is responsive on opposite sides to the input and output pressures respectively of the vehicle load sensing valve.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: March 14, 1978
    Assignee: Clayton Dewandre Company Limited
    Inventors: Eric William Richmond, Wilbur Mills Page