Patents by Inventor William Knight Russell

William Knight Russell 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).

  • Air gap device with interchangeable parts
    Patent number: 5673725
    Abstract: An air gap, venturi-type mixer for mixing a liquid chemical with water includes a readily field-exchangeable collimator, water seal and venturi unit to accommodate different flow rates. The venturi unit includes a funnel with slightly inclined walls that direct a misaligned collimated water stream into the vena contracta of the venturi without reducing its speed or entraining any air.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: October 7, 1997
    Assignee: Knight Equipment International, Inc.
    Inventors: William Knight Russell, Paul M. Beldham, Jeffrey J. Lukawski, Christopher W. Nesselroad