Patents by Inventor David Clement Speaight

David Clement Speaight 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).

  • Pistons
    Patent number: 4114519
    Abstract: A piston having a crown and a body connected together by bolts. The bolts pass through an annular gap defined by a pair of concentric ring members located between the crown and the body. One of the ring members is relatively resilient and the other ring member is relatively rigid. Such a construction reduces fretting between the crown and the body when the piston is in operation in an engine.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: September 19, 1978
    Assignee: Wellworthy Limited
    Inventor: David Clement Speaight