Patents by Inventor Daniel J. Heffner

Daniel J. Heffner 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).

  • Breather valve, arrangement and method
    Patent number: 6189496
    Abstract: A breather valve and arrangement for an internal combustion engine, having a scavenge hole that is open for a relatively long period of time relative to piston travel. Scavenge hole preferably subtends an angle of between 20° and 150°, and preferably is open from between 30° and 135° of piston travel. A method of replacing an existing breather valve with this novel breather valve is also described. Other arrangements for achieving the advantages of the novel breather valve are also described.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: February 20, 2001
    Assignee: S & S Cycle, Inc.
    Inventors: Daniel J. Heffner, Scott A. Sjovall