Patents by Inventor Paul J. Turnbull

Paul J. Turnbull 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 with revolving and oscillating pistons
    Patent number: 4086879
    Abstract: A rotary engine with complemental cylindrical rotors facing each other and rotatable about a common shaft. Each rotor has an annular recess with a pair of diametrically opposed pistons mounted therein, the pistons having their outer ends projecting beyond the recess and being oscillatably receivable in the annular recess of the adjacent rotor.
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: May 2, 1978
    Inventor: Paul J. Turnbull