Patents by Inventor Robert C. Witham

Robert C. Witham 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).

  • Check valve retainer for a scroll compressor
    Patent number: 6749412
    Abstract: A check valve retainer for a scroll compressor includes a retaining lip that fits into a recess formed in a scroll. The retaining lip may be manufactured as an integral part of the check valve retainer for press fitting or may be formed by an expansion fit locking member having a protrusion that forces a portion of check valve retainer wall into the recess. The retaining lip ensures that the check valve retainer stays attached to the scroll without risking scroll deformation.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: June 15, 2004
    Assignee: Scroll Technologies
    Inventors: Sudarshan K. Narasipura, Robert C. Witham
  • Check valve retainer for a scroll compressor
    Publication number: 20040022658
    Abstract: A check valve retainer for a scroll compressor includes a retaining lip that fits into a recess formed in a scroll. The retaining lip may be manufactured as an integral part of the check valve retainer for press fitting or may be formed by an expansion fit locking member having a protrusion that forces a portion of check valve retainer wall into the recess. The retaining lip ensures that the check valve retainer stays attached to the scroll without risking scroll deformation.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 5, 2004
    Inventors: Sudarshan K. Narasipura, Robert C. Witham
  • Heat shield with seal between end cap and non-orbiting scroll
    Patent number: 6428293
    Abstract: An improved heat shield for a scroll compressor is provided with a non-cylindrical end portion caught between the end cap and the non-orbiting scroll. In several embodiments, the portion provides a seal between the discharge chamber and a suction chamber. In one embodiment the portion of the heat shield is serpentine. In another embodiment the portion of the heat shield is generally u-shaped. In further embodiments the portion includes a plurality of circumferentially spaced clips. Several other embodiments are also disclosed.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: August 6, 2002
    Assignee: Scroll Technologies
    Inventors: Todd W. Dewar, Zili Sun, Thomas R. Barito, Robert C. Witham, Gregory W. Hahn