Patents by Inventor Randall R. Ryan

Randall R. Ryan 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).

  • Two-stroke and four-stroke switching mechanism
    Patent number: 7036465
    Abstract: A switching mechanism capable of switching between a two-stroke and a four-stroke operation of an engine as desired, wherein the switching mechanism is switchable between engagement with a first cam lobe for four-stroke operation and a second cam lobe for two-stroke operation, the four-stroke operation maximizing fuel and emissions efficiency and the two-stroke operation maximizing power.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: May 2, 2006
    Assignee: Ricardo, Inc.
    Inventors: Reinhard Burk, Russell J. Wakeman, Randall R. Ryan