Patents by Inventor John W. Coulston

John W. Coulston 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).

  • Free passage nozzle
    Patent number: 4875627
    Abstract: A solid-cone spray nozzle in which the flow-directing vanes are disposed in opposed pairs spaced axially in the nozzle chamber and rotatively displaced a quarter-turn from each other to provide clearance at each vane set, and between them, for the passage of a solid object capable of passing outwardly through the nozzle orifice.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: October 24, 1989
    Assignee: Lechler, Inc.
    Inventors: John W. Coulston, David C. Huffman