Patents by Inventor John Krizman

John Krizman 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).

  • Power control valve attachment for two cycle motorcycle type engine exhaust systems
    Patent number: 3969895
    Abstract: A power control valve attachment is provided for assembly to a pre-existing exhaust system of a two cycle motorcycle type engine for effecting a back pressuring of the engine cylinder chambers during operation of the engine and includes an assembly of pressure plate and spring biasing means and means for mounting the assembly in the exhaust system duct at a minimum cross sectional area thereof for axial deflective movement under the pressure of the exhaust gases.
    Type: Grant
    Filed: June 24, 1974
    Date of Patent: July 20, 1976
    Inventor: John Krizman