Patents by Inventor William E. Willis

William E. Willis 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: 4746141
    Abstract: Collapsible hand cart for carrying a door standing on edge, the cart comprising an elongated vertical beam having two vertically spaced pairs of guide flanges for receiving an edge of a door, the beam being hinged in the middle to fold back upon itself, a handle at the upper end of the beam for guiding the cart and two laterally spaced wheels mounted on an axle through the bottom of the cart for moving the cart, a pivotable horizontal channel support beam projecting outwardly at the bottom of the vertical beam to support an edge of the door, a foot at the upper end of the vertical beam to support the vertical beam in a level position when rotated to the horizontal.
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: May 24, 1988
    Inventor: William E. Willis
  • Patent number: 3977461
    Abstract: A continuous mechanical iron pouring line for pouring molten metal into a moving conveyor line of abutting sand molds. A plurality of pouring ladles mounted on independently driven and controlled carriages move along a track in a closed-loop between: (1) a stationary ladle filling station wherein molten metal flows from a stationary holding vessel into the ladle; (2) a pouring station wherein the molten metal is conveyed from the ladle into an associated moving mold as the ladle and mold move together through the pouring station; and (3) back to the filling station. Control of each carriage is effected by interaction of that carriage with preceding and succeeding carriages. At the pouring station, the mold line parallels the track along which the carriages move and defines a sector wherein the metal may be poured.
    Type: Grant
    Filed: January 8, 1976
    Date of Patent: August 31, 1976
    Assignee: General Motors Corporation
    Inventors: Kenneth J. Pol, William E. Willis
  • Patent number: D278327
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: April 9, 1985
    Inventor: William E. Willis