Patents by Inventor Roby A. Parks

Roby A. 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).

  • Patent number: 6030314
    Abstract: A method for retarding a work machine having a fluid-cooled brake system includes the step of advancing said work machine at a first ground speed during a first period of time. The method also includes the step of sensing a fluid temperature of brake coolant circulating through said brake system during the first period of time. The method further includes the step of advancing said work machine at a second ground speed during a second period of time based on said fluid temperature. During retarding of the work machine, the radiator fan is operated at a predetermined, maximum fan speed irrespective of engine speed of the work machine's engine. Moreover, during retarding of the work machine according to the method of the present invention, the circulation pumps of the work machine's brake cooling system are operated at a predetermined, maximum pump speed irrespective of engine speed of the work machine's engine. An apparatus for retarding a work machine is also disclosed.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: February 29, 2000
    Assignee: Caterpillar Inc.
    Inventors: Tom N. Brooks, Dave N. Martin, Roby A. Parks
  • Patent number: 5215162
    Abstract: A foldable work support apparatus includes an elongated cross beam and first and second leg units each hingedly attached to the cross beam with the upper portion of the leg unit being located beneath the cross beam, the hinged connections permitting the leg units to pivot beneath the cross beam between a use position in which the leg units extend at right angles to the axis of the cross beam and a storage position in which the leg units are coplanar with the cross beam, and latching mechanisms for latching each of the leg units in the use position.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: June 1, 1993
    Inventors: Roby A. Parks, W. Allan Shears
  • Patent number: D334811
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: April 13, 1993
    Inventors: Roby A. Parks, W. Allan Shears