Patents by Inventor Ralph T. Hollister

Ralph T. Hollister 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).

  • Apparatus for cleaning large tank interiors
    Patent number: 4220170
    Abstract: An apparatus for cleaning large tank interiors and other similar areas having a telescoping boom assembly attached to a base assembly with a positionable water nozzle assembly attached to one end of the boom assembly wherein the base member positioned in the tank interior is provided with a cage area housing the necessary control equipment and human operator.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: September 2, 1980
    Inventors: Chris J. Hebert, Ralph T. Hollister, C. Downing Sweat, Jr.
  • Cleaning apparatus for ship holds
    Patent number: 4163455
    Abstract: An apparatus for cleaning cargo or tanker holds of ships is provided having a central support axle extending from the hold floor to the ship deck and on which is a trolley assembly having adjustable spray nozzles which trolley can travel vertically, as well as, rotationally about the support axle.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: August 7, 1979
    Inventors: Chris J. Hebert, Ralph T. Hollister