Patents by Inventor James Patrick Nelligan

James Patrick Nelligan 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).

  • Method and apparatus to facilitate reducing steam leakage
    Patent number: 6776577
    Abstract: A method of assembling a steam turbine includes positioning a sealing member in a leakage path defined between a first stage nozzle diaphragm and a packing casing, wherein the first stage nozzle diaphragm has a first coefficient of thermal expansion, and the packing casing has a second coefficient of thermal expansion, and coupling the first stage nozzle diaphragm and the packing casing such that the sealing member is fixedly secured between the first stage nozzle diaphragm and the packing casing.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: August 17, 2004
    Assignee: General Electric Company
    Inventors: Kafu Chu, James Patrick Nelligan
  • METHOD AND APPARATUS TO FACILITATE REDUCING STEAM LEAKAGE
    Publication number: 20040156722
    Abstract: A method of assembling a steam turbine includes positioning a sealing member in a leakage path defined between a first stage nozzle diaphragm and a packing casing, wherein the first stage nozzle diaphragm has a first coefficient of thermal expansion, and the packing casing has a second coefficient of thermal expansion, and coupling the first stage nozzle diaphragm and the packing casing such that the sealing member is fixedly secured between the first stage nozzle diaphragm and the packing casing.
    Type: Application
    Filed: February 6, 2003
    Publication date: August 12, 2004
    Inventors: Kafu Chu, James Patrick Nelligan
  • Diaphragm screw support for and method of supporting a turbine diaphragm
    Patent number: 6547523
    Abstract: A system for supporting bolted upper and lower diaphragms to one another in an outer housing of a turbine includes support screws threaded into bores adjacent opposite sides of the lower shell. The head of each support screw has a threaded bore receiving a set screw. The set screw has a length equal to the depth of the slot in which the head resides in the lower shell, minus a small clearance. With the diaphragms supported by the engagement of the set screw at the lower end with an abutment at the bottom of the slot, the clearance enables the diaphragms to move vertically upwardly, limited by the clearance distance.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: April 15, 2003
    Assignee: General Electric Company
    Inventor: James Patrick Nelligan
  • DIAPHRAGM SCREW SUPPORT FOR AND METHOD OF SUPPORTING A TURBINE DIAPHRAGM
    Publication number: 20030049123
    Abstract: A system for supporting bolted upper and lower diaphragms to one another in an outer housing of a turbine includes support screws threaded into bores adjacent opposite sides of the lower shell. The head of each support screw has a threaded bore receiving a set screw. The set screw has a length equal to the depth of the slot in which the head resides in the lower shell, minus a small clearance. With the diaphragms supported by the engagement of the set screw at the lower end with an abutment at the bottom of the slot, the clearance enables the diaphragms to move vertically upwardly, limited by the clearance distance.
    Type: Application
    Filed: September 12, 2001
    Publication date: March 13, 2003
    Inventor: James Patrick Nelligan