Patents by Inventor Loc Q. Duong

Loc Q. Duong 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).

  • Radial compressor with blades decoupled and tuned at anti-nodes
    Patent number: 8172511
    Abstract: A gas turbine engine includes a radial compressor with first and second blades. The first and second blades have tuned leading edges that prevent natural frequencies from exciting at speeds within an expected operating speed range.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: May 8, 2012
    Assignee: Hamilton Sunstrand Corporation
    Inventors: Loc Q. Duong, Shiv C. Gupta, Xiaolan Hu
  • Radial compressor of asymmetric cyclic sector with coupled blades tuned at anti-nodes
    Patent number: 8172510
    Abstract: A gas turbine engine includes a radial compressor having first and second blades. The first blade has a tuned leading edge that prevents either blade from exciting at a natural frequency at speeds within an expected operating speed range.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: May 8, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Loc Q. Duong, Shiv C. Gupta, Xiaolan Hu
  • Radial compressor of asymmetric cyclic sector with coupled blades tuned at anti-nodes
    Publication number: 20100278632
    Abstract: A gas turbine engine includes a radial compressor having first and second blades. The first blade has a tuned leading edge that prevents either blade from exciting at a natural frequency at speeds within an expected operating speed range.
    Type: Application
    Filed: May 4, 2009
    Publication date: November 4, 2010
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Loc Q. Duong, Shiv C. Gupta, Xiaolan Hu
  • Radial compressor with blades decoupled and tuned at anti-nodes
    Publication number: 20100278633
    Abstract: A gas turbine engine includes a radial compressor with first and second blades. The first and second blades have tuned leading edges that prevent natural frequencies from exciting at speeds within an expected operating speed range.
    Type: Application
    Filed: May 4, 2009
    Publication date: November 4, 2010
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Loc Q. Duong, Shiv C. Gupta, Xiaolan Hu
  • Turbofan engine comprising an spicyclic transmission having bearing journals
    Patent number: 6964155
    Abstract: A planet gear journal for an epicyclic gear system is asymmetrically formed to compensate for carrier twist. The asymmetry may be between a pair of opposed outwardly open annular channels inboard of a bearing surface of the journal. A particular application is the planetary gear system of a geared turbofan engine.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: November 15, 2005
    Assignee: United Technologies Corporation
    Inventors: Michael E. McCune, Loc Q. Duong
  • Bearing journals
    Publication number: 20040128978
    Abstract: A planet gear journal for an epicyclic gear system is asymmetrically formed to compensate for carrier twist. The asymmetry may be between a pair of opposed outwardly open annular channels inboard of a bearing surface of the journal. A particular application is the planetary gear system of a geared turbofan engine.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 8, 2004
    Inventors: Michael E. McCune, Loc Q. Duong