Patents by Inventor Geoffrey E. Harman

Geoffrey E. Harman 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).

  • Nose bullet anti-icing for gas turbine engines
    Patent number: 4546604
    Abstract: An anti-icing system for a rotating blunt nose bullet of a gas turbine engine uses a rotating thermosyphon effect to create a circulation within a chamber connected for rotation with the nose bullet which draws hot air from a downstream region of the engine forwards to impinge on the nose bullet over a small region close to the engine axis. This avoids complications with separate hot air supplies or electrical heaters. As shown in FIGS. 3 and 4 of the drawings, in one embodiment of the invention the chamber consists simply of a tube closed off by the nose bullet and in combination with an engine main shaft which extends to the turbine region of the engine to draw hot gas from this region. Alternatively, the chamber may extend only to the downstream end of the first compressor.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: October 15, 1985
    Assignee: Rolls-Royce Limited
    Inventors: Alan Moore, Geoffrey E. Harman, David G. Rosser, Edward F. Clapham
  • Nose bullet anti-icing for gas turbine engines
    Patent number: 4485619
    Abstract: An anti-icing system for a rotating blunt nose bullet of a gas turbine engine uses a rotating thermosyphon effect to create a circulation within a chamber connected for rotation with the nose bullet which draws hot air from a downstream region of the engine forwards to impinge on the nose bullet over a small region close to the engine axis. This avoids complications with separate hot air supplies or electrical heaters. As shown in FIGS. 3 and 4 of the drawings, in one embodiment of the invention the chamber consists simply of a tube closed off by the nose bullet and in combination with an engine main shaft which extends to the turbine region of the engine to draw hot gas from this region. Alternatively, the chamber may extend only to the downstream end of the first compressor.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: December 4, 1984
    Assignee: Rolls-Royce Limited
    Inventors: Alan Moore, Geoffrey E. Harman, David G. Rosser, Edward F. Clapham
  • Temperature sensor
    Patent number: 4432658
    Abstract: An anti-icing airflow temperature sensor (2) comprising a temperature sensitive element (4) and a casing (6) around the temperature sensitive element, the front (8) of the casing having apertures (10,12) of high perimeter/aspect ratio, the side of the casing having outwardly forwardly inclined apertures (20) adjacent the temperature sensitive element, the rear (14) of the casing having a substantial open area and the casing having a substantial unapertured portion between its front and the side aperture or apertures.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: February 21, 1984
    Assignee: Rolls-Royce Limited
    Inventors: Geoffrey E. Harman, Malcolm J. F. James