Patents Represented by Attorney David E. Roberts

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  • Joystick assembly for improved machine control
    Patent number: 8212770
    Abstract: A joystick assembly that provides enhanced operator control and stability during rough operation by being primarily rotatable about a vertical axis of a clockspring. The joystick assembly also includes a palm support that is associated with the clockspring via a clamp in the lower housing of the palm support. Further, the joystick assembly has an interface device that includes at least one input device that is conveniently actuated by an operator's thumb.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: July 3, 2012
    Assignee: Caterpillar Inc.
    Inventors: Roger G. Obourn, Matthew Vazquez, Gregory R. Kopp, Daniel E. Shearer, Robert L. Stamate, Gregory A. Stievenart
  • Forestry forwarder cab
    Patent number: D595745
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: July 7, 2009
    Assignee: Caterpillar Inc.
    Inventors: Chad Kingston Jorgensen, Greg D. Finnes
  • Combined joystick control with buttons
    Patent number: D599829
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: September 8, 2009
    Assignee: Caterpillar Inc.
    Inventors: Chad Kingston Jorgensen, Greg D. Finnes