Patents by Inventor Alain Lewis
Alain Lewis 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).
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Patent number: 10526907Abstract: A contact seal assembly for a shaft of a gas turbine engine includes a seal runner adapted to be connected to the shaft and rotatable relative to a carbon ring. The seal runner includes concentric inner and outer annular portions radially spaced apart to define at least one internal fluid passage between the inner and outer annular portions of the seal runner.Type: GrantFiled: March 27, 2017Date of Patent: January 7, 2020Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Daniel Blais, Alain Lewis, Alain C. Martel
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Publication number: 20170198598Abstract: A contact seal assembly for a shaft of a gas turbine engine includes a seal runner adapted to be connected to the shaft and rotatable relative to a carbon ring. The seal runner includes concentric inner and outer annular portions radially spaced apart to define at least one internal fluid passage between the inner and outer annular portions of the seal runner.Type: ApplicationFiled: March 27, 2017Publication date: July 13, 2017Inventors: Daniel BLAIS, Alain LEWIS, Alain C. MARTEL
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Patent number: 9631508Abstract: A contact seal assembly for a shaft of a gas turbine engine includes a seal runner adapted to be connected to the shaft and rotatable relative to a carbon ring. The seal runner includes concentric inner and outer annular portions radially spaced apart to define at least one internal fluid passage between the inner and outer annular portions of the seal runner.Type: GrantFiled: June 13, 2013Date of Patent: April 25, 2017Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Daniel Blais, Alain Lewis, Alain C. Martel
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Publication number: 20140369832Abstract: A contact seal assembly for a shaft of a gas turbine engine includes a seal runner adapted to be connected to the shaft and rotatable relative to a carbon ring. The seal runner includes concentric inner and outer annular portions radially spaced apart to define at least one internal fluid passage between the inner and outer annular portions of the seal runner.Type: ApplicationFiled: June 13, 2013Publication date: December 18, 2014Inventors: Daniel BLAIS, Alain Lewis, Alain C. Martel
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Patent number: 8870699Abstract: A reduction gear box is part of a gas turbine engine and includes a casing and reduction epicyclic gear stages within the casing. The reduction gear stages comprising at least an epicyclic array of gears meshing together with at least one planetary gear mounted for rotation on a gear carrier and a bearing associated therewith. A lubricating oil delivery system is provided within the casing, surrounding a portion of the gear carrier. The oil delivery system includes a conduit; a closed oil reservoir; a first metered opening communicating the conduit with the reservoir and a plurality of metered outlet openings communicating the reservoir with the gear carrier and the bearing such that the reservoir is filled with oil in normal flight operating conditions and the oil trapped in the reservoir is released to the carrier and bearing when a temporary drop in the oil system pressure occurs.Type: GrantFiled: March 11, 2013Date of Patent: October 28, 2014Assignee: Pratt & Whitney Canada Corp.Inventors: Alain Lewis, Roberto Brito, Michel Desjardins
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Publication number: 20140256494Abstract: A reduction gear box is part of a gas turbine engine and includes a casing and reduction epicyclic gear stages within the casing. The reduction gear stages comprising at least an epicyclic array of gears meshing together with at least one planetary gear mounted for rotation on a gear carrier and a bearing associated therewith. A lubricating oil delivery system is provided within the casing, surrounding a portion of the gear carrier. The oil delivery system includes a conduit; a closed oil reservoir; a first metered opening communicating the conduit with the reservoir and a plurality of metered outlet openings communicating the reservoir with the gear carrier and the bearing such that the reservoir is filled with oil in normal flight operating conditions and the oil trapped in the reservoir is released to the carrier and bearing when a temporary drop in the oil system pressure occurs.Type: ApplicationFiled: March 11, 2013Publication date: September 11, 2014Applicant: PRATT & WHITNEY CANADA CORP.Inventors: Alain Lewis, Roberto Brito, Michel Desjardins
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Patent number: 7223197Abstract: An epicyclic gear train includes a sun gear rotatable about a central axis, a concentric outer ring gear, and a plurality of gears mechanically intermediate the sun gear and the ring gear, and which are in meshing engagement therewith. An epicyclic carrier assembly comprises a gear support member and a coupling adapter. The gear support member is adapted to rotatably support the plurality of gears on axles between first and second axle ends. The gear support member has at least a first connecting member. The coupling adapter is disposed concentrically with the gear support member and has a second connecting member. The second connecting member is engaged with the first connecting member to structurally join the coupling adapter and the gear support member. The first and second connecting members are mounted to one another in a plane between the first and second axle ends.Type: GrantFiled: January 6, 2005Date of Patent: May 29, 2007Assignee: Pratt & Whitney Canada Corp.Inventors: Martin Poulin, Alain Lewis, Robert Gautier, Lazar Mitrovic
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Publication number: 20050215390Abstract: An epicyclic gear train includes a sun gear rotatable about a central axis, a concentric outer ring gear, and a plurality of gears mechanically intermediate the sun gear and the ring gear, and which are in meshing engagement therewith. An epicyclic carrier assembly comprises a gear support member and a coupling adapter. The gear support member is adapted to rotatably support the plurality of gears on axles between first and second axle ends. The gear support member has at least a first connecting member. The coupling adapter is disposed concentrically with the gear support member and has a second connecting member. The second connecting member is engaged with the first connecting member to structurally join the coupling adapter and the gear support member. The first and second connecting members are mounted to one another in a plane between the first and second axle ends.Type: ApplicationFiled: January 6, 2005Publication date: September 29, 2005Inventors: Martin Poulin, Alain Lewis, Robert Gautier, Lazar Mitrovic
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Patent number: 6855089Abstract: An epicyclic gear train includes a sun gear rotatable about a central axis, a concentric outer ring gear, and a plurality of gears mechanically intermediate the sun gear and the ring gear, and which are in meshing engagement therewith. An epicyclic carrier assembly comprises a gear support member and a coupling adapter. The gear support member is adapted to rotatably support the plurality of gears on axles between first and second axle ends. The gear support member has at least a first connecting member. The coupling adapter is disposed concentrically with the gear support member and has a second connecting member. The second connecting member is engaged with the first connecting member to structurally join the coupling adapter and the gear support member. The first and second connecting members are mounted to one another in a plane between the first and second axle ends.Type: GrantFiled: December 13, 2002Date of Patent: February 15, 2005Assignee: Pratt & Whitney Canada Corp.Inventors: Martin Poulin, Alain Lewis, Robert Gautier, Lazar Mitrovic
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Patent number: 6663530Abstract: A torque transfer assembly adapted for use in a planetary gear train is provided. The torque transfer assembly comprises generally a planetary carrier and a torque transfer coupling adapter. The planetary carrier is adapted to rotatably support the plurality of planet gears between a first and second planes. The planetary carrier also has a first connecting member extending therefrom. The torque transfer coupling adapter is disposed concentrically and rotatably with the planetary carrier, and has a central torque output element and a second connecting member extending from it. The second connecting member is adapted to be engaged with the first connecting member to structurally join the coupling adapter and the planetary carrier, the first and second connecting members being structurally joined together between the first and second planes.Type: GrantFiled: December 14, 2001Date of Patent: December 16, 2003Assignee: Pratt & Whitney Canada Corp.Inventors: Martin Poulin, Alain Lewis, Robert Gautier
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Publication number: 20030162630Abstract: An epicyclic gear train includes a sun gear rotatable about a central axis, a concentric outer ring gear, and a plurality of gears mechanically intermediate the sun gear and the ring gear, and which are in meshing engagement therewith. An epicyclic carrier assembly comprises a gear support member and a coupling adapter. The gear support member is adapted to rotatably support the plurality of gears on axles between first and second axle ends. The gear support member has at least a first connecting member. The coupling adapter is disposed concentrically with the gear support member and has a second connecting member. The second connecting member is engaged with the first connecting member to structurally join the coupling adapter and the gear support member. The first and second connecting members are mounted to one another in a plane between the first and second axle ends.Type: ApplicationFiled: December 13, 2002Publication date: August 28, 2003Applicant: PRATT & WHITNEY CANADA CORP.Inventors: Martin Poulin, Alain Lewis, Robert Gautier, Lazar Mitrovic
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Publication number: 20030114267Abstract: A torque transfer assembly adapted for use in a planetary gear train is provided. The torque transfer assembly comprises generally a planetary carrier and a torque transfer coupling adapter. The planetary carrier is adapted to rotatably support the plurality of planet gears between a first and second planes. The planetary carrier also has a first connecting member extending therefrom. The torque transfer coupling adapter is disposed concentrically and rotatably with the planetary carrier, and has a central torque output element and a second connecting member extending from it. The second connecting member is adapted to be engaged with the first connecting member to structurally join the coupling adapter and the planetary carrier, the first and second connecting members being structurally joined together between the first and second planes.Type: ApplicationFiled: December 14, 2001Publication date: June 19, 2003Inventors: Martin Poulin, Alain Lewis, Robert Gautier