Patents by Inventor Anthony J. Griffith

Anthony J. Griffith 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).

  • Method and apparatus for laser welding with plasma suppression
    Patent number: 7241965
    Abstract: Laser welding apparatus, in which a laser beam is impinged upon a component to be welded at a laser beam impingement point, wherein a plasma suppressor is arranged to impinge a jet of gas on the component at an angle to its surface, flowing towards the laser beam impingement point.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: July 10, 2007
    Assignee: Rolls-Royce plc
    Inventors: Paul Burt, Anthony J. Griffith, Andrew P. Green
  • Drilling turbine blades
    Patent number: 5222617
    Abstract: Small cooling holes, e.g. 0.25-0.9 mm diameter, in cast hollow turbine blades are provided by delivering successive pulses of laser energy to the surface of the blade until penetration of the blade is complete. By leaving the ceramic casting core in situ within the blade during drilling, the laser beam is prevented from striking through to the far wall of the cavity defined by the ceramic core within the blade. The ceramic core is subsequently removed by leaching techniques common to the art.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: June 29, 1993
    Assignee: Rolls-Royce plc
    Inventors: Owen Gregory, Anthony J. Griffith, David Stroud