Patents by Inventor Michael J. Pettijohn

Michael J. Pettijohn 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: 5443351
    Abstract: An improvement over a prior art mobile hydraulic conveyor apparatus which is mounted on the rear end of a truck for both vertical and lateral pivoting, as well as vertical storage for transport to different locations. The apparatus is moved vertically by a block and tackle arrangement under hydraulic control. Lateral pivoting is achieved by activation of a pair of hydraulic cylinders which act on the conveyor apparatus to shift the apparatus laterally about a pivot axis extending centrally through a turret connected to the conveyor apparatus and mounted on a turret holder which in turn is pivotally mounted on the rear end of the truck. The turret holder includes a c-ring which is mounted in a circumferential groove formed on the turret. The conveyor apparatus includes two pivotally connected trays which support a hydraulically driven belt which transports material dispersed from the truck to a selected location.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: August 22, 1995
    Inventor: Michael J. Pettijohn
  • Patent number: 5193971
    Abstract: This invention relates to an improvement over a prior art mobile hydraulic conveyor apparatus which is mounted on the rear end of a truck for both vertical and lateral pivoting, as well as vertical storage for transport to different locations. The apparatus is moved vertically by a block and tackle arrangement under hydraulic control. Lateral pivoting is achieved by activation of a pair of hydraulic cylinders which act on the conveyor apparatus to shift the apparatus laterally about a pivot axis extending centrally through a turret connected to the conveyor apparatus and mounted on a turret holder which in turn is pivotally mounted on the rear end of the truck. The turret holder includes a c-ring which is mounted in a circumferential groove formed on the turret. The conveyor apparatus includes two pivotally connected trays which support a hydraulically driven belt which transports material dispersed from the truck to a selected location.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: March 16, 1993
    Inventor: Michael J. Pettijohn
  • Patent number: 5044867
    Abstract: A conveyor apparatus that can be attached to the rear of a truck or the like. The conveyor belt apparatus of the present invention may be adjusted in both the vertical and horizontal plates either during operation or when at rest. This versatility in movement assures that the materials discharged by the conveyor are placed in specific locations. The conveyor is stored in the vertical position at the rear of the truck or vehicle to which it is attached. The speed of the motor on the conveyor apparatus may be adjusted to accommodate any number of applications. The whole apparatus is hydraulically controlled, and the hydraulics can be connected with the hydraulic system provided on a truck. The conveyor is provided with a cover to avoid injury to persons by stray particles. The cover also assures that materials will not be lost along the path to the end of the conveyor apparatus.
    Type: Grant
    Filed: July 6, 1990
    Date of Patent: September 3, 1991
    Inventor: Michael J. Pettijohn