Patents by Inventor Sam H. McAllister

Sam H. McAllister 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: 6155765
    Abstract: The present invention is a bulk loader apparatus for providing bulk material through an open roof of an electric arc furnace. The bulk loader apparatus is a base, a swing arm pivotally connected to the base, a swing cradle pivotally connected to an upper region of the swing arm, and a hopper positionable in the swing cradle. In operation, a hydraulic cylinder mounted on the base and connected to the swing arm moves the swing arm from a standby position where a full hopper is positioned in the swing cradle to a charging position where the contents of the hopper are emptied into the electric arc furnace. In a preferred embodiment of the present invention, a wire and pulley assembly is also included to reduce the distance the swing arm must be rotated to empty the bulk material from the hopper. In another embodiment of the present invention, the swing arm is mounted on a turret which rotates the swing arm between the standby position and one or more charging positions.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: December 5, 2000
    Inventors: Bruce J. Warnix, Sam H. McAllister