Patents by Inventor Elmer Erwin

Elmer Erwin 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).

  • Spray nozzles
    Patent number: 3958756
    Abstract: A spray nozzle is of a kind including a housing that has a fluid inlet and first and second groups of spray discharge outlets. First and second flow paths are defined in the housing from the inlet to the first and second groups of outlets. Pulsation means in the first flow path cyclically interrupts the flow of fluid from the inlet to the first group of outlets so as to cause a pulsating spray to be discharged therefrom. The second flow path bypasses the pulsation means to cause a continuous non-pulsating spray to be discharged from the second group of outlets. Included are control means for adjustably dividing flow from the inlet between the first and second flow paths.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: May 25, 1976
    Assignee: Teledyne Water Pik
    Inventors: John Trenary, David Smith, Donald W. Ruehmann, Christopher W. Elkins, Elmer Erwin, Roy Treadwell