Patents by Inventor Ann Margaret Driver

Ann Margaret Driver 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 positive displacement fluid machine
    Patent number: 6226986
    Abstract: A rotary machine has a rotor eccentrically mounted in a casing and having a plurality of vanes connected to oscillating arms via cranks, the cranks having elements pivotally embracing a radial outer end of the arms. The arms can be radial. The rotor has outer axial parts connected to an intermediate part by grooves and rings resisting radial expansion. The rotary machine can be used in a fuel-injected engine for example to derive energy from the difference in air pressure between ambient and the inlet manifold.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: May 8, 2001
    Assignee: Driver Technology Ltd.
    Inventors: Ronald William Driver, Ann Margaret Driver