Patents by Inventor Boris J. Mitchell

Boris J. Mitchell 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 engine
    Patent number: 3930471
    Abstract: A torch ignition engine of reduced complexity and including novel arrangements of the cylinder heads and manifolds. Specific features of a preferred embodiment include auxiliary ignition chambers formed by cup shaped inserts retained in place by the spark plugs, auxiliary intake valves actuated directly by tappets mounted on the spring seats of the main intake valves, and auxiliary induction passages extending internally of the intake manifold, cylinder heads and exhaust manifolds where they extend in heat exchange relation with various exhaust gas passages.
    Type: Grant
    Filed: January 17, 1974
    Date of Patent: January 6, 1976
    Assignee: General Motors Corporation
    Inventors: Henry J. Leonard, Boris J. Mitchell, Charles H. Turner