Patents by Inventor Gary R. Cornwell

Gary R. Cornwell 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).

  • Multi-stage regulation of exhaust back pressure
    Patent number: 7963108
    Abstract: An exhaust system for a two-cycle engine includes an exhaust conduit having both a bypass port and a regulator port for discharging exhaust gases to atmosphere. The bypass port has a fixed size but the regulator port has a variable size that varies over the range of engine speeds. Within a low range of operating speeds, the regulator valve is at least partly closed. Within a mid range of operating speeds, the regulator valve is progressively opened with increases in the operating speed. Within a high range of operating speeds, the regulator valve is progressively closed with further increases in the operating speed.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: June 21, 2011
    Assignee: Hi-Velocity Technology, Inc.
    Inventor: Gary R. Cornwell
  • Expansion chamber for two-cycle engine
    Patent number: 5785014
    Abstract: Expansion chambers for two-cycle engines include a moveable closure piston which selectively increases the flow cross-sectional area geometrically upon increasing back pressure. The improved expansion chamber thus results in better regulation of the back pressure in the two-cycle engine. Several expansion chamber embodiments are disclosed.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: July 28, 1998
    Inventor: Gary R. Cornwell