Patents by Inventor Herbert Edwards

Herbert Edwards 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).

  • Internal combustion engines
    Patent number: 3931812
    Abstract: A multi-cylinder 2-stroke fuel injection engine of the crankcase compression type has a separate crank chamber associated with each cylinder and inlet, transfer and exhaust ports in each cylinder. The exhaust ports of the engine communicate with an exhaust manifold which communicates with the turbine of an exhaust gas driven scavenge compressor, and the impeller of the compressor communicates with an inlet manifold which communicates with the inlet ports of the engine so as to pressure charge each crank chamber and thus increase the mass of air subsequently pumped to the associated cylinder by way of its transfer port.
    Type: Grant
    Filed: August 13, 1973
    Date of Patent: January 13, 1976
    Assignee: David Brown Tractors Limited
    Inventors: Herbert Edward Ashfield, Charles Hartley Hull