Patents by Inventor James R. Keever

James R. Keever 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).

  • Rotary engine and helicopter application
    Patent number: 6378470
    Abstract: In a rotary engine having rotating cylinders which burns a fuel which is not mixed with oil there is a real problem of centrifugal force form the rotating engine causing oil to flow into the combustion chambers. The disclosed rotary engine has oil reservoirs which are positioned radially outwardly from the pistons so that centrifugal force resulting from engine rotation tends to keep oil out of the combustion chambers.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: April 30, 2002
    Inventor: James R. Keever
  • Rotary engine and helicopter application
    Patent number: 6193189
    Abstract: In a rotary engine having rotating cylinders which burns a fuel which is not mixed with oil there is a real problem of centrifugal force form the rotating engine causing oil to flow into the combustion chambers. The disclosed rotary engine has oil reservoirs which are positioned radially outwardly from the pistons so that centrifugal force resulting from engine rotation tends to keep oil out of the combustion chambers.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: February 27, 2001
    Inventor: James R. Keever