Patents by Inventor Stanley R. Duncalf

Stanley R. Duncalf 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: 6471031
    Abstract: An improved mobile belt conveyor is provided which can be quickly and easily converted between use and transport positions. A conveyor frame is pivotally connected to a hopper frame, with hydraulic cylinders controlling the angular position of the hopper relative to the conveyor frame. When the hydraulic cylinders are retracted, the hopper is pivoted upwardly relative to the conveyor, thereby raising a hitch on the forward end of the hopper such that a vehicle can be positioned beneath the hitch. When the hydraulic cylinders are extended, the hopper is pivoted downwardly relative to the conveyor, such that the hitch is lowered onto a hitch receiver on the tractor or vehicle. Thus, a simple two-step process is provided for movement of the conveyor system between the use and transport positions.
    Type: Grant
    Filed: January 8, 2001
    Date of Patent: October 29, 2002
    Inventor: Stanley R. Duncalf