Patents by Inventor Patrick Y. S. Ho

Patrick Y. S. Ho 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).

  • Low noise fan assembly
    Patent number: 5169288
    Abstract: A gas turbine engine rotor assembly such as a fan or compressor includes rotor blades spaced axially from stator vanes inside an annular duct. The number of vanes is selected for a predetermined number of blades for obtaining substantially equal values of a cut-off ratio for at least two blade passing frequency harmonics for reducing spinning mode noise from the duct.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: December 8, 1992
    Assignee: General Electric Company
    Inventors: Philip R. Gliebe, Patrick Y. S. Ho