Patents by Inventor Robert A. Oliver

Robert A. Oliver 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).

  • Drive mechanism for infinitely variable transmission
    Patent number: 8771133
    Abstract: A variator transmission comprises an input shaft (18), an input disc (10) mounted on the input shaft for rotation therewith and an output disc (12) facing the input disc and arranged to rotate coaxially therewith, the input and output discs defining between them a toroidal cavity. Two rollers (14, 16) are located in the toroidal cavity and first and second roller carriage means are provided upon which the first and second rollers respectively are rotatably mounted and end load means (34, 36) urge the rollers into contact with the input and output discs to transmit drive. The two roller carriage means are mounted on opposite sides of the pivotal axis of a lever (50) and the pivotal axis of the lever (50) is movable in both the radial and non-radial directions with respect to the rotational axis of the input and output discs.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: July 8, 2014
    Assignee: Torotrak (Development) Limited
    Inventors: Christopher J. Greenwood, Andrew D. De Freitas, Robert A. Oliver
  • Variator
    Patent number: 8764605
    Abstract: Variators that include a damped roller control part.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: July 1, 2014
    Assignee: Torotrak (Development) Limited
    Inventors: Paul Fairhurst, Robert A. Oliver
  • Drive Mechanism for Infinitely Variable Transmission
    Publication number: 20110300989
    Abstract: A variator transmission comprises an input shaft (18), an input disc (10) mounted on the input shaft for rotation therewith and an output disc (12) facing the input disc and arranged to rotate coaxially therewith, the input and output discs defining between them a toroidal cavity. Two rollers (14, 16) are located in the toroidal cavity and first and second roller carriage means are provided upon which the first and second rollers respectively are rotatably mounted and end load means (34, 36) urge the rollers into contact with the input and output discs to transmit drive. The two roller carriage means are mounted on opposite sides of the pivotal axis of a lever (50) and the pivotal axis of the lever (50) is movable in both the radial and non-radial directions with respect to the rotational axis of the input and output discs.
    Type: Application
    Filed: July 31, 2007
    Publication date: December 8, 2011
    Applicant: Toro-Trak (Development) Limited
    Inventors: Christopher J. Greenwood, Andrew D. De Freitas, Robert A. Oliver
  • Variator
    Publication number: 20110028267
    Abstract: Variators that include a damped roller control part.
    Type: Application
    Filed: December 5, 2008
    Publication date: February 3, 2011
    Inventors: Paul Fairhurst, Robert A. Oliver