Patents by Inventor Herbert W. Bennett

Herbert W. Bennett 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 removing sludge from a spray booth
    Patent number: 5062963
    Abstract: An improved method and apparatus for removing sludge from a spray booth tank using a single pump for withdrawing liquid including sludge from the tank. A portion of the liquid from the pump is returned to the tank through eductors for agitating liquid in the tank. At least a portion of the liquid from the pump flows through a hydrocyclone separator. Sludge from the separator is collected in a settling tank. A small portion of the clarified liquid from the separator flows through an aspirator pump to the booth tank and the remainder of the clarified liquid is returned directly to the booth tank. The aspirator pump returns excess liquid from the settling tank to the booth tank.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: November 5, 1991
    Assignee: DeVilbiss (Canada) Limited
    Inventors: John Marcinkowski, Herbert W. Bennett, Kenji Niwa