Patents by Inventor Herbert H. Johnson

Herbert H. Johnson 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).

  • Noise control for conically ported liquid ring pumps
    Patent number: 4551070
    Abstract: In liquid ring pumps having conical port members, cavitation and associated operating noise are reduced by providing a second subsidiary discharge port beyond the closing edge of the main discharge port in the direction of rotor rotation.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: November 5, 1985
    Assignee: The Nash Engineering Company
    Inventors: Ole B. Olsen, Charles W. Bilik, Herbert H. Johnson, Charles M. Jozepaitis
  • Noise control for conically ported liquid ring pumps
    Patent number: 4521161
    Abstract: In liquid ring pumps having conical port members, cavitation and associated operating noise are reduced by providing a second subsidiary discharge port beyond the closing edge of the main discharge port in the direction of rotor rotation.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: June 4, 1985
    Assignee: The Nash Engineering Company
    Inventors: Ole B. Olsen, Charles W. Bilik, Herbert H. Johnson, Charles M. Jozepaitis