Patents by Inventor Elwood L. Havens

Elwood L. Havens 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).

  • Valve spring spacer
    Patent number: 5044330
    Abstract: A valve spring spacer for internal combustion engines formed from a ring of metal in a stamping operation. The ring has an open center and each side of the ring has alternate raised radial ribs separated by grooves. A radial rib on one side of the ring is axially opposed to a groove on the other side of the ring to allow cooling and reduce heat transmission to the valve spring.
    Type: Grant
    Filed: July 6, 1990
    Date of Patent: September 3, 1991
    Inventors: Elwood L. Havens, Mazy C. Havens