Patents by Inventor Craig Daniel Smith

Craig Daniel Smith 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: 6247461
    Abstract: A relatively simple pressure balanced high flow exhaust gas recirculation (EGR) valve includes an actuator and a separately formed valve assembly retained to the actuator by a deformed lip. The valve body has dual seats controlled by axially spaced heads which are pressure balanced when closed and allow high gas flow when open. The valve body and the associated valve shaft, or portions thereof, are formed of materials having similar coefficients of thermal expansion so that the shaft and body experience similar thermal growth and good seating of the spaced valves is maintained regardless of gas temperature variations. Thickened portions at the valve seats comprise annular ends of a control portion which resist distortion of the seats. The valve body is configured for installation in a cylindrical bore or recess of an associated manifold or other gas passage defining member.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: June 19, 2001
    Assignee: Delphi Technologies, Inc.
    Inventors: Craig Daniel Smith, Paul Ludwig Gluchowski, Dwight Orman Palmer, Mark A. Reeves