Patents by Inventor Robert S. Shoemaker

Robert S. Shoemaker 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: 4251352
    Abstract: An improvement in the screen circumscribing or partially circumscribing the rim of an agitation tank is disclosed. A screen substantially impermeable to the charcoal is provided which is inclined inwardly at an angle between about 35.degree. and 55.degree. from vertical. The metal-bearing charcoal adhering to the screen is readily washed from the screen by the rolling motion of the mixture in the tank.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: February 17, 1981
    Assignee: Bechtel International Corporation
    Inventor: Robert S. Shoemaker
  • Patent number: 4018396
    Abstract: An improved housing embedded in the ground for use in crushing of ore. The housing has a generally figure eight configuration in plan defined by a pair of hollow, upright cylindrical segments with a common wall between the points of intersection of the segments. One segment houses a dump pocket, an ore crusher, a surge chamber and a discharge feeder and conveyor in descending order, and the other segment contains drive machinery, dust control apparatus, a lubrication system, hoist ways, elevator shaft, and other service facilities. The crusher in the first segment is supported on a floor supported by the wall of the first segment itself. The housing requires only a minimum of concrete and reinforcing steel since the cylindrical configuration of the sections thereof provide the most efficient resistance to lateral pressures resulting from earth backfill and surcharge from heavy haul trucks.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: April 19, 1977
    Assignee: Bechtel International Corporation
    Inventors: Robert S. Shoemaker, Donald H. Moyer, Joseph J. Newman