Patents by Inventor Craig R. Legros
Craig R. Legros 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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Publication number: 20170175748Abstract: A cabin air compressor assembly includes a cabin air compressor, and a cabin air compressor motor operably connected to the cabin air compressor. The cabin air compressor motor includes a rotor and a stator having a plurality of end windings. A cabin air compressor housing includes at least one cooling airflow hole formed therein. A motor cooling flow is movable across a portion of the cabin air compressor motor to cool the stator and the end windings. A duct extends from the cabin air compressor housing to an adjacent end winding such that a cooling outlet flow provided via the at least one cooling air flow hole is arranged in fluid communication with the end winding.Type: ApplicationFiled: December 21, 2015Publication date: June 22, 2017Inventors: Debabrata Pal, Craig R. LeGros
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Patent number: 9671172Abstract: A fan includes an air movement implement including a blade and a motor that drives the air movement implement. The motor includes a rotor that includes an internal diameter heat exchanger and a heat pipe having a first end and a second end, the first end in thermal contact with the internal diameter heat exchanger and the second end in thermal contact with the blade.Type: GrantFiled: July 30, 2014Date of Patent: June 6, 2017Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Debabrata Pal, Craig R. Legros
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Publication number: 20170012485Abstract: An electrical machine includes a winding core with a plurality of end slots. A winding is seated in the end slots with end windings where the winding crosses from end slot to end slot. A slot insulator is seated in two of the end slots. The slot insulator includes a first slot liner seated in a first one of the two end slots with a winding slot defined therethrough in an axial direction. A second slot liner is seated in a second one of the two end slots with a winding slot defined therethrough in the axial direction, wherein the second slot liner is spaced apart in a lateral direction relative to the axial direction from the first slot liner by a gap. The slot insulator includes a span portion bridging across the gap to connect the first and second slot liners.Type: ApplicationFiled: July 6, 2015Publication date: January 12, 2017Inventors: Debabrata Pal, Craig R. Legros
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Publication number: 20160178285Abstract: A mist cooling system that includes a casing and a liquid inlet. The casing is configured to receive a liquid flow from a source through the liquid inlet and then provide the liquid flow as a mist to a housing of a motor so as to increase a cooling of the motor and prevent any failure of the motor due to overheating.Type: ApplicationFiled: December 17, 2014Publication date: June 23, 2016Inventors: Debabrata Pal, Craig R. Legros
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Publication number: 20160118863Abstract: An electric motor system includes a motor housing and a stator core disposed within the motor housing. The stator core includes a back iron heat exchanger for passing fluid therethrough. A fluid inlet is disposed at a first portion of the back iron heat exchanger that is at least partially in fluid communication with a liquid coolant source and is configured to accept a cooling mixture. A fluid outlet is disposed at a second portion of the back iron heat exchanger for outletting a gas coolant from the back iron heat exchanger such that liquid coolant is convertible to the gas coolant in the back iron heat exchanger by receiving energy from the stator core allowing the gas coolant exit through the outlet and thereby removing heat from the stator core.Type: ApplicationFiled: October 27, 2014Publication date: April 28, 2016Inventors: Debabrata Pal, Craig R. Legros
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Publication number: 20150300749Abstract: A fan includes an air movement implement including a blade and a motor that drives the air movement implement. The motor includes a rotor that includes an internal diameter heat exchanger and a heat pipe having a first end and a second end, the first end in thermal contact with the internal diameter heat exchanger and the second end in thermal contact with the blade.Type: ApplicationFiled: July 30, 2014Publication date: October 22, 2015Inventors: Debabrata Pal, Craig R. Legros
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Patent number: 8928166Abstract: An electric power generation system (EPGS) employs both a wild-source generator and a variable and/or constant frequency generator. The wild-source generator is coupled to receive mechanical power from a low-pressure spool on an aircraft engine and to generate in response a wild-source output for consumption by voltage and frequency-tolerant loads. The variable and/or constant frequency generator is coupled to receive mechanical power from a high-pressure spool on the aircraft engine and to generate in response a variable and/or constant frequency output for consumption by voltage and frequency-intolerant loads.Type: GrantFiled: August 31, 2011Date of Patent: January 6, 2015Assignee: Hamilton Sundstrand CorporationInventors: Mark J. Seger, Todd A. Spierling, David S. Behling, Craig R. LeGros, Brandon M. Grell
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Patent number: 8920136Abstract: A turbomachine includes a motor including a rotor assembly and a stator assembly. A sleeve fluidly separates the rotor assembly from the stator assembly. The sleeve has first and second ends axially spaced from one another. In one example, first and second seals are arranged at the first end and fluidly separate the rotor assembly from the stator assembly. The second seal is arranged downstream from the first seal relative to the rotor assembly. In another example, the sleeve includes wet and dry sides. A first seal is arranged at the first end on the wet side. A drain is provided in the housing and arranged in a region downstream from the first seal. The drain fluidly connects the region to an exterior of the housing.Type: GrantFiled: January 11, 2012Date of Patent: December 30, 2014Assignee: Hamilton Sundstrand CorporationInventors: Craig R. Legros, Aaron M. Finke
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Publication number: 20140360242Abstract: An end band and method of forming an end band for a rotor. The end band includes a hollow cylindrical band, wherein at least a portion of the band has a grain flow in a direction parallel to the hoop stress of the band. The end band also includes at least a portion having a grain flow in a direction perpendicular to the hoop stress of the band.Type: ApplicationFiled: August 22, 2014Publication date: December 11, 2014Inventors: Kavithas Ponnampalam, Jong-Yeong Yung, William Louis Wentland, Craig R. Legros, Kevin L. Dickerson, Davis S. Behling
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Patent number: 8884480Abstract: A fan includes an air movement implement including a blade and a motor that drives the air movement implement. The motor includes a rotor that includes an internal diameter heat exchanger and a heat pipe having a first end and a second end, the first end in thermal contact with the internal diameter heat exchanger and the second end in thermal contact with the blade.Type: GrantFiled: July 26, 2011Date of Patent: November 11, 2014Assignee: Hamilton Sundstrand CorporationInventors: Debabrata Pal, Craig R. LeGros
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Patent number: 8878409Abstract: A rotor has a rotor body for rotation about a shaft. A plurality of permanent magnets are spaced circumferentially about the rotor body. A containment band is positioned radially outwardly of the permanent magnets. The containment band has a containment band coefficient of thermal expansion. The permanent magnets have a permanent magnet coefficient of thermal expansion, taken parallel to a magnetic alignment. A ratio of the containment band coefficient of thermal expansion to the permanent magnet coefficient of thermal expansion is less than or equal to 1.15.Type: GrantFiled: September 13, 2012Date of Patent: November 4, 2014Assignee: Hamilton Sundstrand Space Systems International, Inc.Inventors: Craig R. Legros, Roy D. Rasmussen
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Publication number: 20140070634Abstract: A rotor has a rotor body for rotation about a shaft. A plurality of permanent magnets are spaced circumferentially about the rotor body. A containment band is positioned radially outwardly of the permanent magnets. The containment band has a containment band coefficient of thermal expansion. The permanent magnets have a permanent magnet coefficient of thermal expansion, taken parallel to a magnetic alignment. A ratio of the containment band coefficient of thermal expansion to the permanent magnet coefficient of thermal expansion is less than or equal to 1.15.Type: ApplicationFiled: September 13, 2012Publication date: March 13, 2014Inventors: Craig R. Legros, Roy D. Rasmussen
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Publication number: 20130270828Abstract: A housing for an electrical device includes an interior surface and one or more stress reducing notches. The interior surface is configured to interface with one or more internal components of the motor. The one or more stress reducing notches are located along the interior surface of the housing.Type: ApplicationFiled: April 13, 2012Publication date: October 17, 2013Applicant: HAMILTON SUNDSTRAND CORPORATIONInventor: Craig R. Legros
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Publication number: 20130221794Abstract: An end band and method of forming an end band for a rotor. The end band includes a hollow cylindrical band, wherein at least a portion of the band has a grain flow in a direction parallel to the hoop stress of the band. The end band also includes at least a portion having a grain flow in a direction perpendicular to the hoop stress of the band.Type: ApplicationFiled: February 28, 2012Publication date: August 29, 2013Applicant: HAMILTON SUNDSTRAND CORPORATIONInventors: Kavithas Ponnampalam, Jong-Yeong Yung, William Louis Wentland, Craig R. Legros, Kevin L. Dickerson, David S. Behling
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Publication number: 20130177405Abstract: A turbomachine includes a motor including a rotor assembly and a stator assembly. A sleeve fluidly separates the rotor assembly from the stator assembly. The sleeve has first and second ends axially spaced from one another. In one example, first and second seals are arranged at the first end and fluidly separate the rotor assembly from the stator assembly. The second seal is arranged downstream from the first seal relative to the rotor assembly. In another example, the sleeve includes wet and dry sides. A first seal is arranged at the first end on the wet side. A drain is provided in the housing and arranged in a region downstream from the first seal. The drain fluidly connects the region to an exterior of the housing.Type: ApplicationFiled: January 11, 2012Publication date: July 11, 2013Inventors: Craig R. Legros, Aaron M. Finke
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Patent number: 8424416Abstract: An apparatus is provided and includes a rotatable shaft on which a first bevel gearbox is disposed, a layshaft on which a second bevel gearbox is disposed, the first and second bevel gearboxes being coupled to transmit shaft rotation to the layshaft, an accessory gearbox to which the layshaft and one or more accessories are coupled and a generator operably disposed on the layshaft between the second bevel gearbox and the accessory gearbox.Type: GrantFiled: June 18, 2010Date of Patent: April 23, 2013Assignee: Hamilton Sundstrand CorporationInventors: Keith E. Short, Michael F. Cass, Craig R. Legros
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Publication number: 20130049366Abstract: An electric power generation system (EPGS) employs both a wild-source generator and a variable and/or constant frequency generator. The wild-source generator is coupled to receive mechanical power from a low-pressure spool on an aircraft engine and to generate in response a wild-source output for consumption by voltage and frequency-tolerant loads. The variable and/or constant frequency generator is coupled to receive mechanical power from a high-pressure spool on the aircraft engine and to generate in response a variable and/or constant frequency output for consumption by voltage and frequency-intolerant loads.Type: ApplicationFiled: August 31, 2011Publication date: February 28, 2013Applicant: HAMILTON SUNDSTRAND CORPORATIONInventors: Mark J. Seger, Todd A. Spierling, David S. Behling, Craig R. LeGros, Brandon M. Grell
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Publication number: 20130025828Abstract: A fan includes an air movement implement including a blade and a motor that drives the air movement implement. The motor includes a rotor that includes an internal diameter heat exchanger and a heat pipe having a first end and a second end, the first end in thermal contact with the internal diameter heat exchanger and the second end in thermal contact with the blade.Type: ApplicationFiled: July 26, 2011Publication date: January 31, 2013Applicant: Hamilton Sundstrand CorporationInventors: Debabrata Pal, Craig R. LeGros
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Publication number: 20130025833Abstract: A static dissipating agent (SDA) dispersion apparatus and method disperses an SDA into a coolant system from a filter having a filter material and an SDA suspended within the filter material.Type: ApplicationFiled: July 29, 2011Publication date: January 31, 2013Inventor: Craig R. Legros
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Patent number: 8316880Abstract: A bypass valve assembly for a generator includes a spring cover with a flange which extends in a radial direction from a spring cover body. The spring cover body defines an overall length dimension, the overall length dimension to an end of the spring cover body to the flange dimension defines a ratio between 1.6:1-1.2:1. The bypass valve assembly also includes a valve sleeve with a multiple of windows. Each of the multiple of windows includes a longitudinal edge which defines a longitudinal edge radius and corner radius.Type: GrantFiled: May 8, 2009Date of Patent: November 27, 2012Assignee: Hamilton Sundstrand CorporationInventors: Andrew P. Grosskopf, Glenn C. Lemmers, Jr., Craig R. Legros