Patents by Inventor Randall H. Bishop

Randall H. Bishop 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).

  • High precision grinding and remanufacturing of machine components
    Patent number: 8474140
    Abstract: Grinding a machine component such as a valve component during remanufacturing, includes seating one end of the valve component in a chuck of the grinding apparatus, then contacting a steady rest with a reference surface on an outer diameter of the valve component while rotating the valve component, and then reseating the one end of the valve component in the chuck. A first valve surface on an outer diameter of the valve component is ground while contacting the steady rest with the reference surface, then a second, different valve surface on the outer diameter of the valve component is ground also while contacting the steady rest with the reference surface. The valve component is then reassembled with a hydraulically actuated device for service therein.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: July 2, 2013
    Assignee: Caterpillar Inc.
    Inventors: Francis E. Erbes, Michael Grier, Gary Harris, Randall H. Bishop
  • High precision grinding and remanufacturing of machine components
    Publication number: 20090265907
    Abstract: Grinding a machine component such as a valve component during remanufacturing, includes seating one end of the valve component in a chuck of the grinding apparatus, then contacting a steady rest with a reference surface on an outer diameter of the valve component while rotating the valve component, and then reseating the one end of the valve component in the chuck. A first valve surface on an outer diameter of the valve component is ground while contacting the steady rest with the reference surface, then a second, different valve surface on the outer diameter of the valve component is ground also while contacting the steady rest with the reference surface. The valve component is then reassembled with a hydraulically actuated device for service therein.
    Type: Application
    Filed: April 29, 2008
    Publication date: October 29, 2009
    Inventors: Francis E. Erbes, Michael Grier, Gary Harris, Randall H. Bishop