Patents by Inventor Donald G. Parks

Donald G. Parks 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).

  • Method and apparatus for hydraulically actuating a vehicle seat
    Patent number: 4793583
    Abstract: The present invention provides simple and effective mechanisms, apparatus and self contained fluid circuitry to hydraulically actuate the vehicle's seat in generally downward movement in response to general upward movement of the vehicle's terrain contacting apparatus in relation to the vehicle's main body mass. The present invention also includes a simple device to remotely adjust and control the response movement of a hydraulic seat actuator. Also included in the invention is a means of controlling the actions of one or more hydraulic double acting piston pumps.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: December 27, 1988
    Inventors: John W. Bergacker, Thomas H. Milbauer, Donald G. Parks
  • Apparatus for hydraulically actuating a vehicle seat
    Patent number: 4729538
    Abstract: The present invention provides simple and effective mechanisms, apparatus and self contained fluid circuitry to hydraulically actuate the vehicle's seat in generally downward movement in response to general upward movement of the vehicle's terrain contacting apparatus in relation to the vehicle's main body mass. The present invention also includes a simple device to remotely adjust and control the response movement of a hydraulic seat actuator. Also included in the invention is a means of controlling the actions of one or more hydraulic double acting piston pumps.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: March 8, 1988
    Inventors: John W. Bergacker, Thomas H. Milbauer, Donald G. Parks