Patents by Inventor Alfredo Hilfiker

Alfredo Hilfiker 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).

  • Supercharger device for reciprocating internal combustion engines, particularly for motor vehicles
    Patent number: 4887580
    Abstract: Supercharger device for reciprocating internal combustion engines, particularly for motor vehicles, comprising, inserted on the induction manifold of the engine, a rotary positive-displacement supercharger driven constantly by the motor shaft, the capacity and therefore the delivery pressure whereof is variable from a minimum value to a maximum value and vice versa by virtue of the corresponding controlled variation of the geometry of the pumping means constituted by a stator cylinder, a rotor and vanes.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: December 19, 1989
    Assignee: Pneumofore S.P.A.
    Inventor: Alfredo Hilfiker