Patents by Inventor Richard J. Ifield

Richard J. Ifield 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).

  • Bent axis pumps and motors
    Patent number: 4129063
    Abstract: A bent axis pump having a port in the housing thereof which port is movable to vary the displacement of the pump and including leak-proof transfer sleeves extending between the port and the housing to effect flow of fluid between the pump housing and the port.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: December 12, 1978
    Assignee: Ifield Engineering Pty. Limited
    Inventor: Richard J. Ifield
  • Hydraulic actuator
    Patent number: RE29000
    Abstract: A hydraulic actuator for producing translational movement over a long distance having two jack cylinders with pistons mounted for reciprocal movement and connected to a worm wheel through a worm gear. When a piston is driving, the worm gear acts as a rack to turn the worm wheel and when a piston is being returned to its starting position the worm gear rotates. Means are provided to alternately switch from one cylinder to the other.
    Type: Grant
    Filed: March 21, 1974
    Date of Patent: October 12, 1976
    Assignee: R. J. Ifield & Sons Pty. Limited
    Inventors: Richard J. Ifield, William R. Ifield