Patents by Inventor Bobby D. Griffith

Bobby D. Griffith 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).

  • Lubrication control system for a work machine
    Patent number: 5823295
    Abstract: A control system for lubricating a work machine is provided. The control system includes a lubricant distribution system, a charging system adapted to drive the lubricant distribution system, a sensor for determining the operating state of the charging system, and a device for calculating a time interval being dependent upon a previous lubricating event. The control also includes a device for producing a lubrication signal in response to the time interval reaching a predetermined interval constant.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: October 20, 1998
    Assignee: Caterpillar Inc.
    Inventors: Bobby D. Griffith, Mark R. Hawkins, Dean J. Schlickbernd, Steven J. Zmuda
  • Shear pin assembly for counterweights
    Patent number: 4072324
    Abstract: A counterweight mounting assembly has a counterweight mounted thereon and a shear pin is extended to dispose it in aligned bores formed in the counterweight and in the frame of the vehicle. When the counterweight is lowered for removal from the vehicle, the operator first pulls on a handle secured to the shear pin to retract the shear pin into a stored position within the counterweight. First and second stops are provided between the counterweight and the shear pin to hold the shear pin at each of its extended and retracted positions.
    Type: Grant
    Filed: August 19, 1976
    Date of Patent: February 7, 1978
    Assignee: Caterpillar Tractor Co.
    Inventor: Bobby D. Griffith
  • Protective guard assembly for track drive motors
    Patent number: 3930549
    Abstract: A track-type vehicle comprises a pair of laterally spaced track assemblies adjustably mounted on a frame of the vehicle for movement between maximum and minimum gauge widths thereof. A guard assembly is mounted on the frame to fully cover and protect the motors when the track assemblies are positioned at each such gauge width. The guard assembly is preferably attached to the frame by three laterally spaced pin connections which further function to transmit towing forces to the frame directly.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: January 6, 1976
    Assignee: Caterpillar Tractor Co.
    Inventor: Bobby D. Griffith