Patents by Inventor David John Lavin

David John Lavin 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).

  • Patent number: 7121088
    Abstract: A valve assembly is adapted to be disposed in an automotive engine exhaust system at an outlet of an internal combustion engine. The assembly includes a valve body having an opening therethrough including an inlet portion and an outlet portion. A first valve and a second valve are disposed in the opening intermediate the inlet and outlet portions. The first and second valves have an open position and a closed position. The first valve blocks a first predetermined amount of the opening when in the closed position. The second valve blocks a second predetermined amount of the opening when in the closed position, with the second predetermined amount being less than the first predetermined amount. An actuator is connected to the first valve and the second valve and is operable to selectively move each of the valves between respective the open positions and the closed positions.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: October 17, 2006
    Assignee: General Motors Corporation
    Inventor: David John Lavin