Patents by Inventor Darrell A. Burtchell

Darrell A. Burtchell 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).

  • Tappet
    Patent number: 4549509
    Abstract: A tappet with an off-center cam following surface offers a means for adjusting the timing of valves, etc., in a cam timing device. For the timing of the valve train in an internal combustion engine, the tappet offers a high degree of flexibility in adjusting the timing.
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: October 29, 1985
    Inventor: Darrell A. Burtchell