Patents by Inventor M. Theodore Gresh

M. Theodore Gresh 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).

  • Four-bearing rotor system
    Patent number: 7726883
    Abstract: A bearing apparatus for reducing vibrations in a compressor shaft (17) carrying a rotating compressor (10) is provided. The bearing apparatus comprises a first bearing (14) for supporting the shaft (17) and a second bearing (13) spaced outboard from the first bearing (14) for producing a moment on the shaft and additional damping counter to the direction of vibrations.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: June 1, 2010
    Assignee: Elliott Company
    Inventors: M. Theodore Gresh, James Shurina, Francis Kushner
  • Turbomachine radial impeller vibration constraining and damping mechanism
    Patent number: 5984638
    Abstract: A compressor blade vibration reduction mechanism for a high-speed radial impeller for minimizing fatigue failures from various excitation sources. The vibration reduction mechanism includes a plurality of loose-fitting lashing pins coupling each impeller blade to an adjacent impeller blade. Each lashing pin extends through a first aperture in a blade located adjacent to the blade tip and through a second aperture of an adjacent blade. The second aperture of each blade is located a greater distance from the leading edge of the blade than the first aperture. The second aperture is located in an area of the blade having lower vibration during operation than the blade location where the first aperture is located.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: November 16, 1999
    Assignee: Elliott Turbomachinery Co., Inc.
    Inventors: M. Theodore Gresh, Francis Kushner