Patents by Inventor Earl S. Hansen

Earl S. Hansen 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).

  • Closed circuit fuel vapor system
    Patent number: 4524746
    Abstract: A closed circuit vapor system wherein liquid is introduced to an ultrasonic transducer in a vaporizing chamber where it is vaporized and drawn into a preheater chamber and then drawn off by a pump and recirculated back to pass through the heater chamber. In one embodiment, it jets through a venturi to draw off more vapor from the vaporization chamber for heating and recirculation. The dry vapors are drawn off only as needed to meet the engine demands.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: June 25, 1985
    Inventor: Earl S. Hansen