Patents by Inventor Donald Gene Clark

Donald Gene Clark 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).

  • Remanufactured pump and pump remanufacturing method
    Patent number: 9206811
    Abstract: A remanufactured pump includes a casing and a pumping mechanism positioned within the casing having a rotatable pump shaft and an impeller mounted upon the pump shaft and rotatable within a pumping chamber in the casing. A first insert is held fast within a first bore in the casing, and a second insert is held fast within a second bore in the casing, each via an interference fit. Sealing mechanisms are positioned within the first and second inserts to form a first seal about the pump shaft to prevent leakage of a working fluid from the pumping chamber, and a second seal about the pump shaft to prevent leakage of a lubricating fluid from a bearing chamber in the casing. Related methodology is also disclosed.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: December 8, 2015
    Assignee: Caterpillar Inc.
    Inventors: Donald Gene Clark, Curtis John Graham, Jack Maclellan Nix, Caxton Darnell Martin, Jr.
  • Remanufactured Pump And Pump Remanufacturing Method
    Publication number: 20140003921
    Abstract: A remanufactured pump includes a casing and a pumping mechanism positioned within the casing having a rotatable pump shaft and an impeller mounted upon the pump shaft and rotatable within a pumping chamber in the casing. A first insert is held fast within a first bore in the casing, and a second insert is held fast within a second bore in the casing, each via an interference fit. Sealing mechanisms are positioned within the first and second inserts to form a first seal about the pump shaft to prevent leakage of a working fluid from the pumping chamber, and a second seal about the pump shaft to prevent leakage of a lubricating fluid from a bearing chamber in the casing. Related methodology is also disclosed.
    Type: Application
    Filed: July 2, 2012
    Publication date: January 2, 2014
    Applicant: CATERPILLAR, INC.
    Inventors: Donald Gene Clark, Curtis John Graham, Jack Maclellan Nix, Caxton Darnell Martin, JR.