Patents by Inventor Ardell W. Johnson

Ardell W. Johnson 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: 4348153
    Abstract: A rock box which mounts in front of a farm tractor and is suitable for loading, transporting and dumping rocks. The rock box can be lowered, tilted and raised by a single hydraulic cylinder and can be operated from the operator's seat of the farm tractor. Levers are provided to apply hydraulic cylinder action directly to raise or lower the rock box of this invention to the ground level. A chain is provided to transpose linear action of said cylinder into tilt or rotary action for unloading the contents of said rock box. Control connections are provided to control the rock box movements from inside the tractor cab.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: September 7, 1982
    Inventor: Ardell W. Johnson