Patents by Inventor Nigel T Birch

Nigel T Birch 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).

  • Gas turbine engine exhaust nozzle having a noise attenuation device driven by shape memory material actuators
    Patent number: 7000378
    Abstract: A gas turbine engine exhaust nozzle arrangement for the flow of exhaust gases therethrough between an upstream end and a downstream end thereof comprising a nozzle and a plurality of tabs which extend in a generally axial direction from a downstream portion of the nozzle wherein the nozzle further comprises an actuation mechanism capable of moving the tabs between a first deployed position, where the tabs interact with a gas stream to reduce exhaust noise thereof, and a second non-deployed position, where the tabs are substantially aerodynamically unobtrusive.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: February 21, 2006
    Assignee: Rolls-Royce plc
    Inventors: Nigel T Birch, John R Webster
  • Gas turbine engine exhaust nozzle having a noise attenuation device driven by shape memory material actuators
    Patent number: 6813877
    Abstract: A gas turbine engine exhaust nozzle arrangement for the flow of exhaust gases therethrough between an upstream end and a downstream end thereof comprising a nozzle and a plurality of tabs which extend in a generally axial direction from a downstream portion of the nozzle wherein the nozzle further comprises an actuation mechanism capable of moving the tabs between a first deployed position, where the tabs interact with a gas stream to reduce exhaust noise thereof, and a second non-deployed position, where the tabs are substantially aerodynamically unobtrusive.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: November 9, 2004
    Assignee: Rolls-Royce plc
    Inventors: Nigel T Birch, John R Webster
  • Gas turbine engine exhaust nozzle
    Publication number: 20020125340
    Abstract: A gas turbine engine exhaust nozzle arrangement for the flow of exhaust gases therethrough between an upstream end and a downstream end thereof comprising a nozzle and a plurality of tabs which extend in a generally axial direction from a downstream portion of the nozzle wherein the nozzle further comprises an actuation mechanism capable of moving the tabs between a first deployed position, where the tabs interact with a gas stream to reduce exhaust noise thereof, and a second non-deployed position, where the tabs are substantially aerodynamically unobtrusive.
    Type: Application
    Filed: February 12, 2002
    Publication date: September 12, 2002
    Inventors: Nigel T. Birch, John R. Webster