Michael Scott Mccune

US Patent:

6964155, Nov 15, 2005

Filed:

Dec 30, 2002

Appl. No.:

10/334020

Inventors:

Michael E. McCune - Colchester CT, US
Loc Q. Duong - South Windsor CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F02K003/02

US Classification:

602261, 475331, 384297, 384913

Abstract:

A planet gear journal for an epicyclic gear system is asymmetrically formed to compensate for carrier twist. The asymmetry may be between a pair of opposed outwardly open annular channels inboard of a bearing surface of the journal. A particular application is the planetary gear system of a geared turbofan engine.

US Patent:

7662059, Feb 16, 2010

Filed:

Oct 18, 2006

Appl. No.:

11/582581

Inventors:

Michael E. McCune - Colchester CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F16H 57/04
F16H 57/08
F16N 1/00
F01D 25/18

US Classification:

475159, 475331, 184 4, 184 611, 184 612, 184 272

Abstract:

A support shaft provides lubrication to a journal bearing during windmilling operation of a gear set. A primary oil pump provides oil from an oil supply during driven operation of the fan, and a secondary oil pump provides oil from an internal sump during windmilling operation of the fan. During driven operation of the fan, oil is pumped with the primary oil pump through a primary oil flow path to an outer surface of the support shaft. During windmilling fan operation, oil is pumped from an internal sump with a secondary oil pump through the secondary oil flow path. The secondary oil flow path has a smaller flow capacity, and the secondary oil pump is a smaller capacity pump.

US Patent:

7704178, Apr 27, 2010

Filed:

Jul 5, 2006

Appl. No.:

11/481112

Inventors:

William G. Sheridan - Southington CT, US
Michael E. McCune - Colchester CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F16H 57/04

US Classification:

475159, 475331

Abstract:

A gas turbine engine includes an epicyclic gear train that drives a turbo fan. The epicyclic gear train employs a one-piece carrier in which the spaced side walls are interconnected with circumferentially spaced apart mounts to form a unitary structure. Baffles are secured to the carrier near the mounts and provide lubrication passages that spray oil onto the sun gear and/or intermediate gears arranged between the baffles. The baffles can be constructed from a different material than the carrier since the baffles are not structural components in the gear train.

US Patent:

7874163, Jan 25, 2011

Filed:

Dec 1, 2004

Appl. No.:

11/718416

Inventors:

Brian Merry - Andover CT, US
Scot Adams Webb - Gales Ferry CT, US
Michael McCune - Colchester CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F02C 7/275

US Classification:

60788, 60786

Abstract:

A starter-generator system for a tip turbine engine includes a starter motor with a fixed starter generator stator and a starter generator rotor. The fixed starter generator stator is mounted to a static inner support housing. The starter generator rotor surrounds the fixed starter generator stator and is engagement with the axial compressor rotor.

US Patent:

7883438, Feb 8, 2011

Filed:

Dec 4, 2009

Appl. No.:

12/631162

Inventors:

Michael E. McCune - Colchester CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F16H 57/04
F16H 57/08
F16N 1/00
F01D 25/18

US Classification:

475159, 475161, 475331, 184 4, 184 611, 184 612, 184 272

Abstract:

A support shaft provides lubrication to a journal bearing during windmilling operation of a gear set. A primary oil pump provides oil from an oil supply during driven operation of the fan, and a secondary oil pump provides oil from an internal sump during windmilling operation of the fan. During driven operation of the fan, oil is pumped with the primary oil pump through a primary oil flow path to an outer surface of the support shaft. During windmilling fan operation, oil is pumped from an internal sump with a secondary oil pump through the secondary oil flow path. The secondary oil flow path has a smaller flow capacity, and the secondary oil pump is a smaller capacity pump.

US Patent:

7883439, Feb 8, 2011

Filed:

Mar 5, 2010

Appl. No.:

12/718408

Inventors:

William G. Sheridan - Southington CT, US
Michael E. McCune - Colchester CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F16H 57/04

US Classification:

475159, 475331, 602261, 60382

Abstract:

A gas turbine engine includes an epicyclic gear train that drives a turbo fan. The epicyclic gear train employs a one-piece carrier in which the spaced side walls are interconnected with circumferentially spaced apart mounts to form a unitary structure. Baffles are secured to the carrier near the mounts and provide lubrication passages that spray oil onto the sun gear and/or intermediate gears arranged between the baffles. The baffles can be constructed from a different material than the carrier since the baffles are not structural components in the gear train.

US Patent:

7926260, Apr 19, 2011

Filed:

Feb 23, 2010

Appl. No.:

12/710863

Inventors:

William G. Sheridan - Southington CT, US
Michael E. McCune - Colchester CT, US
Alessio Pescosolido - West Hartford CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F02K 3/02
F04D 25/02

US Classification:

602261, 4151242, 464 99

Abstract:

A shaft for a gas turbine engine is provided that includes a first shaft section, a second shaft section, a first flexible linkage, and a second flexible linkage. The first shaft section extends between a forward axial end and an aft axial end along a first axial centerline. The second shaft section extends between a forward axial end and an aft axial end along a second axial centerline. The first flexible linkage includes a bridge section connected between a first diaphragm and a second diaphragm. The first diaphragm is connected to the aft axial end of the first shaft section. The second diaphragm is connected to the forward axial end of the second shaft section. The second flexible linkage includes a diaphragm and a hub. The second flexible linkage diaphragm cantilevers radially outwardly from an inner radial end to an outer radial end, and is connected to the aft axial end of the second shaft section. The hub is connected to the outer radial end of the second flexible linkage diaphragm, and includes an engine shaft coupling connected to the hub.

US Patent:

7937927, May 10, 2011

Filed:

Dec 1, 2004

Appl. No.:

11/719224

Inventors:

Gabriel Suciu - Glastonbury CT, US
Brian Merry - Andover CT, US
Michael E. McCune - Colchester CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F02C 1/06

US Classification:

60 39162, 60268

Abstract:

A tip turbine engine () provides an axial compressor rotor () that is counter-rotated relative to a fan (). A planetary gearset () couples rotation of a fan () to an axial compressor rotor (), such that the axial compressor rotor () is driven by rotation of the fan in a rotational direction opposite that of the fan. By counter-rotating the axial compressor rotor, a final stage of compressor vanes () between the final stage of compressor blades () and inlets () to the hollow fan blades () of the fan are eliminated. As a result, the length of the axial compressor () and the overall length of the tip turbine engine () are decreased.