Patents by Inventor Frederic RAGOT

Frederic RAGOT 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).

  • Patent number: 9815447
    Abstract: A method for monitoring at least two aircraft wheel electromechanical braking actuators. For each electromechanical actuator, the method includes first determining a current value representative of the power supply current of the electromechanical actuator and determining a reference current value estimated from the power supply currents of at least one other electromechanical actuator. Then, the representative current value and the reference current value are compared. Any abnormal operation of the electromechanical actuator is detected when the difference between the representative current value and the reference current value is above a predetermined threshold.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: November 14, 2017
    Assignee: MESSIER-BUGATTI-DOWTY
    Inventors: Philippe Chico, Frédéric Ragot, François Bonigen, Thomas Lepage
  • Patent number: 9574633
    Abstract: A method for monitoring a blocking member (12) of an electromechanical actuator (1). The monitoring method comprising the steps of: determining a value representative of a power supply current of a motor (11) during an off-load operating phase of the electromechanical actuator (1); comparing the value representative of the power supply current with a predetermined current threshold defined from nominal off-load operating characteristics of the electromechanical actuator (1); and detecting an accidental locking of the blocking member (12) when the value representative of the power supply current is above or equal to the predetermined current threshold. There also is an electromechanical actuator (1) comprising a blocking member (12) monitored by such a method.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: February 21, 2017
    Assignee: MESSIER-BUGATTI-DOWTY
    Inventors: Thomas Lepage, Philippe Chico, Francois Bonigen, Frederic Ragot
  • Patent number: 9169007
    Abstract: The invention relates to a method of managing parking braking in a braking system for a vehicle fitted with at least one electric brake including at least one electric actuator having a pusher actuated by an electric motor for selectively applying a force against friction elements of the brake, the method comprising the steps of: establishing a series of direct adjustment tables for parking braking, corresponding to braking situations at different energy levels; when applying parking braking, selecting a direct adjustment table corresponding to a braking situation preceding the application of parking braking; and directly adjusting a parking braking force in application with the selected direct adjustment table.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: October 27, 2015
    Assignee: MESSIER-BUGATTI-DOWTY
    Inventors: Stephane Mudry, Frédéric Ragot, Jean-Baptiste Vaney, Emmanuel Colin
  • Patent number: 9169006
    Abstract: The invention relates to a method of managing parking braking in a braking system for a vehicle fitted with at least one electric brake including at least one electric actuator having a pusher actuated by an electric motor for selectively applying a force against friction elements of the brake, the method comprising the steps of: establishing a series of direct adjustment tables for parking braking, corresponding to braking situations at different energy levels; when applying parking braking, selecting a direct adjustment table corresponding to a braking situation preceding the application of parking braking; and directly adjusting a parking braking force in application with the selected direct adjustment table.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: October 27, 2015
    Assignee: MESSIER-BUGATTI-DOWTY
    Inventors: Stéphane Mudry, Frédéric Ragot, Jean-Baptiste Vaney, Emmanuel Colin
  • Publication number: 20150217748
    Abstract: A method for monitoring at least two aircraft wheel electromechanical braking actuators. For each electromechanical actuator, the method includes first determining a current value representative of the power supply current of the electromechanical actuator and determining a reference current value estimated from the power supply currents of at least one other electromechanical actuator. Then, the representative current value and the reference current value are compared. Any abnormal operation of the electromechanical actuator is detected when the difference between the representative current value and the reference current value is above a predetermined threshold.
    Type: Application
    Filed: January 26, 2015
    Publication date: August 6, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Philippe CHICO, Frédéric RAGOT, François BONIGEN, Thomas LEPAGE
  • Publication number: 20150198209
    Abstract: A method for monitoring a blocking member (12) of an electromechanical actuator (1). The monitoring method comprising the steps of: determining a value representative of a power supply current of a motor (11) during an off-load operating phase of the electromechanical actuator (1); comparing the value representative of the power supply current with a predetermined current threshold defined from nominal off-load operating characteristics of the electromechanical actuator (1); and detecting an accidental locking of the blocking member (12) when the value representative of the power supply current is above or equal to the predetermined current threshold. There also is an electromechanical actuator (1) comprising a blocking member (12) monitored by such a method.
    Type: Application
    Filed: January 7, 2015
    Publication date: July 16, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Thomas LEPAGE, Philippe CHICO, Francois BONIGEN, Frederic RAGOT
  • Publication number: 20140116821
    Abstract: An aircraft electromechanical braking system comprising a braking control unit 10 and at least one electromechanical brake 1, the brake 1 being fitted with at least one electromechanical actuator 4 having a pusher 6 suitable for being moved by means of an electric motor 7. The actuator 4 also has a blocking member 8 for blocking the pusher 6 in position. The control unit 10 is adapted to cause the braking system to operate in an additional braking mode referred to as “combined” mode, in which the motor 7 is activated to bring the pusher 6 into a position in which it exerts a given holding force, and then the blocking member 8 is activated, while activation of the motor 7 is maintained.
    Type: Application
    Filed: October 22, 2013
    Publication date: May 1, 2014
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Dominique ONFROY, Thomas LEPAGE, Franck SELLES, Frédéric RAGOT
  • Publication number: 20110160975
    Abstract: The invention relates to a method of managing parking braking in a braking system for a vehicle fitted with at least one electric brake including at least one electric actuator having a pusher actuated by an electric motor for selectively applying a force against friction elements of the brake, the method comprising the steps of: establishing a series of direct adjustment tables for parking braking, corresponding to braking situations at different energy levels; when applying parking braking, selecting a direct adjustment table corresponding to a braking situation preceding the application of parking braking; and directly adjusting a parking braking force in application with the selected direct adjustment table.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 30, 2011
    Applicant: MESSIER-BUGATTI
    Inventors: Stéphane MUDRY, Frédéric RAGOT, Jean-Baptiste VANEY, Emmanuel COLIN