Patents by Inventor Fred D. Holbrook

Fred D. Holbrook 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).

  • Method and apparatus for washing mixing containers
    Patent number: 4194925
    Abstract: A method and apparatus for washing a mixing container or tube includes a network of piping mounted within the tub. The piping is interconnected to a pumping system operable for delivering a washing fluid, such as a liquid, to the piping. The piping includes spray outlets which may be selectively directed toward walls and internal components of the tub for Washing residue therefrom. The washing liquid may be retained within the tub as a portion of the liquid required for a subsequent mixing operation.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: March 25, 1980
    Assignee: Columbia Machine, Inc.
    Inventors: Fred D. Holbrook, Perry Holbrook