Patents by Inventor David R. Percival

David R. Percival 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).

  • Patent number: 7611079
    Abstract: A spray nozzle which employs a locking and an alignment feature to facilitate the replacement of internal nozzle components. The spray nozzle includes a nozzle body, a swirl element and an orifice disc. The nozzle body defines a central bore which extends between a fluid receiving section and a fluid discharge section and delineates a central axis and delimits an interior locating surface for swirl element and the orifice disc. The orifice disc includes a protuberance associated with the downstream surface thereof which protrudes into the spray opening of the nozzle body.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: November 3, 2009
    Assignee: Delavan Limited
    Inventors: Frank Whittaker, James E. Lloyd, David R. Percival
  • Publication number: 20080217435
    Abstract: A spray nozzle (300) which employs a locking and an alignment feature (330) to facilitate the replacement of internal nozzle components. The spray nozzle includes a nozzle body (310), a swirl element (314) and an orifice disc (312). The nozzle body defines a central bore which extends between a fluid receiving section and a fluid discharge section and delineates a central axis and delimits an interior locating surface for swirl element and the orifice disc. The orifice disc includes a protuberance (374) associated with the downstream surface thereof which protrudes into the spray opening of the nozzle body.
    Type: Application
    Filed: February 13, 2002
    Publication date: September 11, 2008
    Inventors: Frank Whittaker, James E. Lloyd, David R. Percival
  • Publication number: 20070251663
    Abstract: The invention includes a system, method and machine readable program for dynamically controlling the casting of a material. Generally, the systems and methods described herein include an active control feedback system or aspects thereof including a temperature sensing device that is well-suited for the harsh environment of the interior of a caster such as a caster for casting metal. Temperature measurement can be accomplished either directly or indirectly. The system is configured to compare the measured temperature with an ideal casting temperature. The temperature sensing device is operably coupled to a cooling device that modulates a flow of coolant to dynamically cool the material being cast. In accordance with one embodiment of the invention, the cooling device includes a plurality of nozzles for delivering one or more cooling fluids to the material being cast.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 1, 2007
    Inventors: William Sheldon, Randall Duane Siders, Douglas Myhre, Steven Lenertz, Timothy Griffith, David R. Percival