Patents by Inventor J. Scott Drennan

J. Scott Drennan 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).

  • Variable hub-to-hub phasing rotor system
    Patent number: 10549849
    Abstract: An aircraft includes a first rotor assembly, a second rotor assembly, and a rotor phase angle control system. The system includes a phase adjustor operably associated with the first rotor assembly and the second rotor assembly. The method includes sensing vibrations exerted on the aircraft and offsetting a phase angle of the first rotor assembly and the second rotor assembly to minimize the vibrations.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: February 4, 2020
    Inventors: Brian Modrzejewski, Ken Shundo, Frank B. Stamps, David Popelka, J. Scott Drennan, Michael E. Rinehart
  • Variable Hub-to-Hub Phasing Rotor System
    Publication number: 20200023951
    Abstract: An aircraft includes a first rotor assembly, a second rotor assembly, and a rotor phase angle control system. The system includes a phase adjustor operably associated with the first rotor assembly and the second rotor assembly. The method includes sensing vibrations exerted on the aircraft and offsetting a phase angle of the first rotor assembly and the second rotor assembly to minimize the vibrations.
    Type: Application
    Filed: February 13, 2018
    Publication date: January 23, 2020
    Inventors: Brian Modrzejewski, Ken Shundo, Frank B. Stamps, David Popelka, J. Scott Drennan, Michael E. Rinehart
  • Variable hub-to-hub phasing rotor system
    Patent number: 9889927
    Abstract: An aircraft includes a first rotor assembly, a second rotor assembly, and a rotor phase angle control system. The system includes a phase adjustor operably associated with the first rotor assembly and the second rotor assembly. The method includes sensing vibrations exerted on the aircraft and offsetting a phase angle of the first rotor assembly and the second rotor assembly to minimize the vibrations.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: February 13, 2018
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Brian Modrzejewski, Ken Shundo, Frank B. Stamps, David Popelka, J. Scott Drennan, Michael E. Rinehart
  • Method and Apparatus for Z-Direction Reinforcement of Composite Laminates
    Publication number: 20110277937
    Abstract: A method and apparatus for Z-direction reinforcement of composite laminates is disclosed. Discrete fibers are pulled through a fiber composite preform in the Z-direction by barbed needles.
    Type: Application
    Filed: August 1, 2011
    Publication date: November 17, 2011
    Inventors: J. Donn Hethcock, J. Scott Drennan, Ken D. Cominsky
  • Method and apparatus for Z-direction fiber insertion of discrete fibers for reinforcement of composite laminates
    Patent number: 7993477
    Abstract: A method and apparatus for Z-direction reinforcement of composite laminates is disclosed. Discrete fibers (25) are pulled through a fiber composite preform (11) in the Z-direction by needles (27) having bars (29) thereon to insert the Z-direction reinforcement (31) into the composite preform (11) from a discrete fiber mat (23) having discrete fibers (25) therein.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: August 9, 2011
    Assignee: Bell Helicopter Textron Inc.
    Inventors: J. Donn Hethcock, J. Scott Drennan, Kenneth D. Cominski