Patents by Inventor Marlin Ritchie

Marlin Ritchie 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).

  • Sequential hydraulic extension system
    Patent number: 6813988
    Abstract: A serial, multi-unit hydraulic system which utilizes a single hydraulic fluid circuit each for extending and retracting all constituent hydraulic units. The fluid circuit for retraction of a remote hydraulic unit extends through intervening, primary hydraulic unit(s), and, after retraction of the remote hydraulic unit, provides retraction oil flow to primary hydraulic unit(s). Control valves effect a prescribed sequence of extension and retraction of the constituent hydraulic units, without involving separate, external control apparatuses.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: November 9, 2004
    Inventors: Leonard Kruppa, Scott Jones, Marlin Ritchie, Mark Kosel
  • Sequential hydraulic extension system
    Publication number: 20040154290
    Abstract: A serial, multi-unit hydraulic system which utilizing a single hydraulic fluid circuit each for extending and retracting all constituent hydraulic units. The fluid circuit for retraction of a remote hydraulic unit extends through intervening, primary hydraulic unit(s), and, after retraction of the remote hydraulic unit, provides retraction oil flow to primary hydraulic unit(s). Control valves effect a prescribed sequence of extension and retraction of the constituent hydraulic units, without involving separate, external control apparatuses.
    Type: Application
    Filed: February 12, 2003
    Publication date: August 12, 2004
    Applicant: Texas Hydraulics, Inc.
    Inventors: Leonard Kruppa, Scott Jones, Marlin Ritchie, Mark Kosel