Patents by Inventor John Hafer

John Hafer 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).

  • System and methods for adaptive blade control surface adjustment
    Patent number: 8727722
    Abstract: A system and methods for reducing vibration in a rotatable member are provided. The system includes a blade tracking sensor, a rotatable member comprising an adjustable aspect, and a control computer. The control computer is configured to determine an axial position of each blade, determine a first blade that is displaced by a greatest distance along the axis in a first direction, modify an aspect of the first blade to facilitate reducing a vibration in the rotary blade system, determine if the vibration level in the rotary blade system is reduced, and select another rotatable member to modify such that a vibration in the rotary blade system is facilitated being further reduced.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: May 20, 2014
    Assignee: General Electric Company
    Inventors: Peter B. Houser, John Henry Studer, Gerald L. Vossler, John Hafer
  • SYSTEM AND METHODS FOR ADAPTIVE BLADE CONTROL SURFACE ADJUSTMENT
    Publication number: 20100047067
    Abstract: A system and methods for reducing vibration in a rotatable member are provided. The system includes a blade tracking sensor, a rotatable member comprising an adjustable aspect, and a control computer. The control computer is configured to determine an axial position of each blade, determine a first blade that is displaced by a greatest distance along the axis in a first direction, modify an aspect of the first blade to facilitate reducing a vibration in the rotary blade system, determine if the vibration level in the rotary blade system is reduced, and select another rotatable member to modify such that a vibration in the rotary blade system is facilitated being further reduced.
    Type: Application
    Filed: December 27, 2007
    Publication date: February 25, 2010
    Inventors: Peter B. Houser, John Henry Studer, Gerald L. Vossler, John Hafer