Patents by Inventor Alban Lemaitre
Alban Lemaitre 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: 10567254Abstract: A method of characterizing a signal, the method including acquiring a signal; and determining a vibration rating of a portion of the signal; determining a level of variation of a portion of the signal; and determining information characterizing the signal by applying a function that takes as arguments the vibration rating and the level of variation.Type: GrantFiled: November 4, 2014Date of Patent: February 18, 2020Assignee: SAFRAN AIRCRAFT ENGINESInventors: Alban Lemaitre, Serge Le Gonidec
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Patent number: 10323538Abstract: A method of making safe operation of a rotary assembly of a turbomachine including a turbine and a rotary machine, the method anticipating an event of exceeding a predetermined threshold speed by repetitively performing a prediction cycle including: measuring magnitudes relating to operation of the turbomachine, including real speed of rotation of its rotary assembly; based on the magnitudes, estimating driving and resisting torques applied to the rotary assembly; preparing a representative value representative of the difference between these two torques; and calculating a predicted speed of rotation for the rotary assembly at a given time horizon based on the representative value and the real speed of rotation. An action is taken on the operation of the turbomachine to limit an extent to which its rotary assembly exceeds the threshold speed in the event of the predicted speed of rotation exceeding the threshold speed.Type: GrantFiled: February 19, 2013Date of Patent: June 18, 2019Assignee: SAFRAN AIRCRAFT ENGINESInventors: Alban Lemaitre, Serge Le Gonidec
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Patent number: 9482271Abstract: In a disengageable axial thrust bearing for a rotary machine, an outer ring has first and second outer half-rings (114A, 114B) centered in a casing (116) and clamped in the axial direction between a stationary thrust member (118) and a first pre-loading system (120) exerting a first predetermined axial force such that, so long as the axial load exerted on the axial thrust bearing via a synchronization element (106) is greater than a determined threshold value, rolling elements (110) with oblique contacts present respective single lines (130) having two points of contact (130A, 130B) with an inner ring (102) and with the first outer half-ring (114A), the second outer half-ring (114B) being spaced apart from the first by a second predetermined axial force exerted by a second pre-loading system (126) inserted in the axial direction between the first and second outer half-rings, and such that the inner ring (102) is driven in rotation by the synchronization element, whereas, when the axial load exerted on the axiType: GrantFiled: March 25, 2014Date of Patent: November 1, 2016Assignee: SNECMAInventors: Sébastien Boufflert, Philippe Bourdin, Alban Lemaitre, Fabien Tessier
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Publication number: 20160294654Abstract: A method of characterizing a signal, the method including acquiring a signal; and determining a vibration rating of a portion of the signal; determining a level of variation of a portion of the signal; and determining information characterizing the signal by applying a function that takes as arguments the vibration rating and the level of variation.Type: ApplicationFiled: November 4, 2014Publication date: October 6, 2016Applicant: SNECMAInventors: Alban LEMAITRE, Serge LE GONIDEC
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Patent number: 9435373Abstract: In a rotary machine bearing including an inner ring, an outer ring, and rolling elements between them, one of the inner and outer rings includes first and second half-rings suitable for being clamped in the axial direction between a thrust member and a first pre-loading system exerting a first predetermined axial force, and a second pre-loading system is provided that is inserted in the axial direction between the first and second half-rings and that exerts a second predetermined axial force less than the first predetermined axial force.Type: GrantFiled: March 18, 2014Date of Patent: September 6, 2016Assignee: SNECMAInventors: Sebastien Boufflert, Philippe Bourdin, Alban Lemaitre, Fabien Tessier
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Publication number: 20160195039Abstract: A device (10A, 10B) for feeding a rocket engine with propellant, the device comprising at least one propellant tank (10, 11), a combustion chamber (18), and a feed pipe (12, 13) extending from the tank (10, 11) to the combustion chamber (18) to feed propellant to the combustion chamber. A valve (14, 15) and a main pump (16, 17) are arranged in succession along the feed pipe. The rocket engine device further comprises at least one branch pump (20, 21, 120, 220) making a branch connection to the tank upstream from the valve in order to feed an auxiliary pipe (22, 23, 122, 222) that serves an auxiliary function of the rocket engine.Type: ApplicationFiled: August 4, 2014Publication date: July 7, 2016Applicant: SNECMAInventors: François DANGUY, Alban LEMAITRE, Laurent FABBRI, Vincent PENDARIES
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Publication number: 20160040711Abstract: In a rotary machine bearing including an inner ring, an outer ring, and rolling elements between them, one of the inner and outer rings includes first and second half-rings suitable for being clamped in the axial direction between a thrust member and a first pre-loading system exerting a first predetermined axial force, and a second pre-loading system is provided that is inserted in the axial direction between the first and second half-rings and that exerts a second predetermined axial force less than the first predetermined axial force.Type: ApplicationFiled: March 18, 2014Publication date: February 11, 2016Applicant: SNECMAInventors: Sebastien BOUFFLERT, Philippe BOURDIN, Alban LEMAITRE, Fabien TESSIER
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Publication number: 20160032964Abstract: In a disengageable axial thrust bearing for a rotary machine, an outer ring has first and second outer half-rings (114A, 114B) centered in a casing (116) and clamped in the axial direction between a stationary thrust member (118) and a first pre-loading system (120) exerting a first predetermined axial force such that, so long as the axial load exerted on the axial thrust bearing via a synchronization element (106) is greater than a determined threshold value, rolling elements (110) with oblique contacts present respective single lines (130) having two points of contact (130A, 130B) with an inner ring (102) and with the first outer half-ring (114A), the second outer half-ring (114B) being spaced apart from the first by a second predetermined axial force exerted by a second pre-loading system (126) inserted in the axial direction between the first and second outer half-rings, and such that the inner ring (102) is driven in rotation by the synchronization element, whereas, when the axial load exerted on the axiType: ApplicationFiled: March 25, 2014Publication date: February 4, 2016Applicant: SNECMAInventors: Sébastien BOUFFLERT, Philippe BOURDIN, Alban LEMAITRE, Fabien TESSIER
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Publication number: 20150030464Abstract: A method of making safe operation of a rotary assembly of a turbomachine including a turbine and a rotary machine, the method anticipating an event of exceeding a predetermined threshold speed by repetitively performing a prediction cycle including: measuring magnitudes relating to operation of the turbomachine, including real speed of rotation of its rotary assembly; based on the magnitudes, estimating driving and resisting torques applied to the rotary assembly; preparing a representative value representative of the difference between these two torques; and calculating a predicted speed of rotation for the rotary assembly at a given time horizon based on the representative value and the real speed of rotation. An action is taken on the operation of the turbomachine to limit an extent to which its rotary assembly exceeds the threshold speed in the event of the predicted speed of rotation exceeding the threshold speed.Type: ApplicationFiled: February 19, 2013Publication date: January 29, 2015Applicant: SNECMAInventors: Alban Lemaitre, Serge Le Gonidec
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Patent number: 8886582Abstract: A system for detecting and locating failures that occur in a complex system includes elements (CAP, MODVAL, MODDP, MODFD) for detecting and locating a failure affecting at least one sub-system of the complex system. The system also includes an element (MODPD) for making a decision on any action to be taken in the event of such detection. A rocket engine can be monitored with this system.Type: GrantFiled: February 17, 2011Date of Patent: November 11, 2014Assignee: SNECMAInventors: Serge Le Gonidec, Pierre Bornert, Alban Lemaitre
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Publication number: 20130046713Abstract: A system for detecting and locating failures that occur in a complex system includes elements (CAP, MODVAL, MODDP, MODFD) for detecting and locating a failure affecting at least one sub-system of the complex system. The system also includes an element (MODPD) for making a decision on any action to be taken in the event of such detection. A rocket engine can be monitored with this system.Type: ApplicationFiled: February 17, 2011Publication date: February 21, 2013Applicant: SNECMAInventors: Serge Le Gonidec, Pierre Bornert, Alban Lemaitre