Patents by Inventor Stephen T. Hemsley

Stephen T. Hemsley 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).

  • Jet spray sprinkler
    Patent number: 4889287
    Abstract: An irrigation sprinkler having a body to which is fitted a cap. Water issues from a nozzle in the body to impinge on the end of the cap, the end of the cap having an internal surface formed by revolution of an arc about the axis of the cap. Apertures are formed by serrations in the curved surface opening through a conical surface in the end of the cap.
    Type: Grant
    Filed: January 5, 1988
    Date of Patent: December 26, 1989
    Assignee: James Hardie Building Products Pty. Limited
    Inventors: Stephen T. Hemsley, Bogdan Roszowski