Richard J Chevrette

6651986, Nov 25, 2003

Jan 29, 2002

10/057930

Richard Jon Chevrette - Troy NY
David Robert Skinner - Pattersonville NY
Christopher Edward Wolfe - Niskayuna NY

General Electric Company - Schenectady NY

F16J 15447

277421, 277416, 277546

A rotary machine has a stationary component with circumferential grooves and a rotatable component, as well as annular packing or sealing ring segments movable toward and away from the rotating component. To prevent circumferential displacement of the lower side packing ring segments by gravity forces and enable the lowermost segment in the lower housing to be moved radially inwardly, the side segments of the lower housing are supported adjacent the casing midline in a manner preventing downward movement and enabling horizontal movement. In an exemplary embodiment, the lower side packing ring segment is elongated so as to extend above the horizontal joint of the housing and a key bar extends from a key bar groove in the housing to engage a corresponding groove in the segment. The key bar may be disposed to define a seal key for the horizontal joint.

6695316, Feb 24, 2004

Sep 21, 2001

09/957631

Daniel Michael Popa - Schenectady NY
Richard Jon Chevrette - Troy NY
Christopher Edward Wolfe - Schenectady NY

General Electric Company - Schenectady NY

F16J 1544

277411, 277416

A rotary machine has stationary upper and lower housings with circumferential grooves and a rotatable component, as well as annular sealing segments movable toward and away from the rotating components between large and small clearance positions. To prevent circumferential displacement of the lower side segments by gravity forces and to enable the lowermost segment in the lower housing to move vertically between inner and outer clearance positions, the side segments of the lower housing are supported by brackets resting on a support surface forming part of the horizontal midline at the juncture of the upper and lower housings. Consequently, the gaps between the lower ends of the side segments and the opposite ends of the lower segment in the open position of the segments remains, enabling the lower segment to move radially vertically inwardly upon closing the seals.

6715766, Apr 6, 2004

Oct 30, 2001

09/984659

Richard Chevrette - Troy NY
Matthew Patrick Boespflug - Clifton Park NY

General Electric Company - Schenectady NY

F16J 15447

277416, 277411, 277412, 277413

A packing segment for an annular seal ring assembly for use in a hot gas path of a turbomachine, includes a sealing face mounting a plurality of axially spaced sealing teeth; a necked-in center portion radially outward of the sealing face; and a mounting portion radially outward of the center portion. At least one steam feed hole extends angularly from a radially outermost face of the segment to a location along a side of the center portion such that, in use, at least a portion of the feed hole is exposed to hot gas in the hot gas path for flow through the feed hole to a cavity behind the segment.

7201560, Apr 10, 2007

Dec 6, 2004

11/003454

Charles Thomas O'Clair - Waterford NY, US
Richard Jon Chevrette - Troy NY, US
Carl A. Greco - Guilderland NY, US
Jeyaruban Amirtharajah - Niskayuna NY, US

General Electric Company - Schenectady NY

F01D 11/02

4151742, 415231

A packing ring holder assembly for packing seal segments about a steam turbine rotor includes a nozzle box and a holder cooperable to form a dovetail for securing packing ring segments to the nozzle box. A spring is interposed between the nozzle box and packing ring segment to bias the latter radially inwardly for sealing with the rotor. The holder includes a shoulder for preventing axial movement of the spring in one direction.

7484927, Feb 3, 2009

Apr 14, 2006

11/404956

Richard J. Chevrette - Troy NY, US
Flor Rivas - Clifton Park NY, US
Frederick G. Baily - Ballston Spa NY, US
William E. Adis - Scotia NY, US
Mark E. Kelly - Alplaus NY, US
Bernard A. Couture - Schenectady NY, US
Kurt N. Laurer - Saratoga Springs NY, US

General Electric Company - Schenectady NY

F04D 29/10

415113, 4151742, 416196 R

Disclosed herein is a packing ring assembly including a packing ring segment, a bar, a cover plate, and a spring. The packing ring segment has an axial slot. The bar is disposed within the slot. The cover plate is disposed along an outer periphery of the packing ring segment. And, the spring is compressed between the bar and the cover plate.

7641200, Jan 5, 2010

Nov 28, 2005

11/287727

Richard Jon Chevrette - Troy NY, US

General Electric Company - Schenectady NY

F16J 15/447
F16J 15/00

277303, 277413, 277421, 277545, 277578

Disclosed is a variable clearance packing ring arrangement including a packing ring, wherein the packing ring includes a sealing face. The variable clearance packing ring arrangement also includes an actuating arrangement internal to the packing ring.

7731478, Jun 8, 2010

May 25, 2006

11/441286

Richard Chevrette - North Greenbush NY, US
Frederick G. Baily - Galway NY, US

General Electric Company - Schenectady NY

F01D 11/12
F01D 25/24

4151735, 4151742, 4151745

Methods and apparatus for a packing ring segment assembly for sealing a turbine gas path are provided. The assembly includes a sealing portion including radially inwardly directed teeth, and a dovetail mounting portion including a hollowed out portion including a biasing member internal to the packing ring segment. The biasing member is coupled to the packing ring segment and configured to engage a pair of annular shoulders of a dovetail groove in the turbine such that the packing ring segment is biasing radially outward at relatively low turbine loads and low working pressure, and at relatively high turbine loads and high working pressure a working fluid overcomes the radial biasing member forces and urge the packing ring segment radially inward.

7887291, Feb 15, 2011

May 15, 2007

11/803640

Richard Chevrette - Troy NY, US
John Powers - Scotia NY, US
Dominick Werther - Schenectady NY, US
Steven Burdgick - Schenectady NY, US

General Electric Company - Schenectady NY

F03B 11/02

4152092, 4152131

A support arrangement for a diaphragm segment in a turbine casing that includes: 1) a support bar joined to a diaphragm segment; 2) a turbine casing comprising a vertical wall and a horizontal shoulder, wherein a portion of the horizontal shoulder underlies the support bar; 3) a cut out area defined by the vertical wall and an outer edge of the support bar; and 4) a shim interposed between the horizontal shoulder and the support bar. The cut out area may be a size that allows the shim to pass through.