Patents by Inventor Roy Allan Plew

Roy Allan Plew 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).

  • Unitary hollowed piston with improved structural strength
    Patent number: 6941852
    Abstract: A unitary, “hollow out” piston is molded or forged with only two tools, which move along a single parting direction, with a pair of arcuate side walls that provide maximal outer surface area with minimal thickness and weight. The thin walls are internally fortified by a cruciform support structure that is molded integrally by the same tools. No post forming machining steps are needed to reduce weight.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: September 13, 2005
    Assignee: Delphi Technologies, Inc.
    Inventors: Anh Le, Roy Allan Plew, John F. Quesada