Patents by Inventor Pascal Leguay

Pascal Leguay 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: 11034439
    Abstract: The present invention relates to A device for supplying hydraulic power, the device comprising two hydraulic circuits jointly feeding multi-cylinder hydraulic power transmission means in which each cylinder is connected to a single one of the hydraulic circuits independently of the others. Each hydraulic circuit includes a hydraulic pressure and flow rate generator and a pressure control module controlling said hydraulic pressure and flow rate generator so as to regulate the pressure of said fluid flowing in said hydraulic circuit as a function of said pressure of said fluid flowing in each hydraulic circuit and possibly as a function of one or more parameters external to said device.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: June 15, 2021
    Assignee: AIRBUS HELICOPTERS
    Inventors: Pascal Leguay, Jean-Yves Agresta, Arnaud Groll
  • Publication number: 20180002007
    Abstract: The present invention relates to A device for supplying hydraulic power, the device comprising two hydraulic circuits jointly feeding multi-cylinder hydraulic power transmission means in which each cylinder is connected to a single one of the hydraulic circuits independently of the others. Each hydraulic circuit includes a hydraulic pressure and flow rate generator and a pressure control module controlling said hydraulic pressure and flow rate generator so as to regulate the pressure of said fluid flowing in said hydraulic circuit as a function of said pressure of said fluid flowing in each hydraulic circuit and possibly as a function of one or more parameters external to said device.
    Type: Application
    Filed: June 22, 2017
    Publication date: January 4, 2018
    Applicant: AIRBUS HELICOPTERS
    Inventors: Pascal LEGUAY, Jean-Yves AGRESTA, Arnaud GROLL
  • Patent number: 9624946
    Abstract: A hydraulic valve (3, 3?) of a servo-control for feathering the blades (1) of a rotorcraft rotor. The hydraulic valve (3, 3?) comprises a main valve member (5) and an emergency valve member (6) blocked relative to a valve cylinder (4) of the hydraulic valve (3, 3?) by means of a pin (23) in sliding thrust engagement in a cavity (24) of the emergency valve member (6). Relative movement between the emergency valve member (6) and the valve cylinder (4) initiating sliding movement of the pin (23) inside the cavity (24) and causing mover means (27) for moving the pin (23) to be put into operation, thereby releasing the emergency valve member (6) to move freely.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: April 18, 2017
    Assignee: AIRBUS HELICOPTERS
    Inventors: Jean-Romain Bihel, Pascal Leguay, Thibaut Marger
  • Patent number: 9115733
    Abstract: The present invention relates to a servo-control (1) provided with at least one body (2) defining an inside space (10) together with a slider element (11) having a control piston (12) suitable for sliding in said inside space (10), said control piston (12) subdividing said inside space (10) into a retraction chamber (4) and an extension chamber (3). The servo-control (1) has at least one limit force detector device (20) comprising a casing (21) secured to said body (2) and defining a detection space (22). Furthermore, a movable member (50) subdivides said detection space (22) into a first detection chamber (26) opening out to said inside space (10) and a second detection chamber (27). Finally, the device includes detector means (29) for detecting the position of said movable member (50) in said detection space (22).
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: August 25, 2015
    Assignee: Airbus Helicopters
    Inventors: Jean-Romain Bihel, Pascal Leguay, Cédric Carlavan, Nicolas Bourdais
  • Publication number: 20150176612
    Abstract: A hydraulic valve (3, 3?) of a servo-control for feathering the blades (1) of a rotorcraft rotor. The hydraulic valve (3, 3?) comprises a main valve member (5) and an emergency valve member (6) blocked relative to a valve cylinder (4) of the hydraulic valve (3, 3?) by means of a pin (23) in sliding thrust engagement in a cavity (24) of the emergency valve member (6). Relative movement between the emergency valve member (6) and the valve cylinder (4) initiating sliding movement of the pin (23) inside the cavity (24) and causing mover means (27) for moving the pin (23) to be put into operation, thereby releasing the emergency valve member (6) to move freely.
    Type: Application
    Filed: May 14, 2014
    Publication date: June 25, 2015
    Applicant: AIRBUS HELICOPTERS
    Inventors: Jean-Romain BIHEL, Pascal LEGUAY, Thibaut MARGER
  • Patent number: 8886370
    Abstract: The present invention relates to a friction device (11) for maintaining a control member (2, 8) in a determined position. The device comprises a contact part (16) movable between a declutched stable position and a clutched stable position, and vice versa. The clutched stable position corresponds to a position in which the contact part (16) bears against the control member (2, 8) in such a manner as to establish a determined friction force. An electromechanical drive means moves the contact part (16) between the two stable positions. The device includes remote control means for activating and deactivating the drive means.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: November 11, 2014
    Assignee: Airbus Helicopters
    Inventors: Cédric Carlavan, Pascal Leguay
  • Publication number: 20120011840
    Abstract: The present invention relates to a servo-control (1) provided with at least one body (2) defining an inside space (10) together with a slider element (11) having a control piston (12) suitable for sliding in said inside space (10), said control piston (12) subdividing said inside space (10) into a retraction chamber (4) and an extension chamber (3). The servo-control (1) has at least one limit force detector device (20) comprising a casing (21) secured to said body (2) and defining a detection space (22). Furthermore, a movable member (50) subdivides said detection space (22) into a first detection chamber (26) opening out to said inside space (10) and a second detection chamber (27). Finally, the device includes detector means (29) for detecting the position of said movable member (50) in said detection space (22).
    Type: Application
    Filed: July 7, 2011
    Publication date: January 19, 2012
    Applicant: EUROCOPTER
    Inventors: Jean-Romain Bihel, Pascal Leguay, Cédric Carlavan, Nicolas Bourdais
  • Publication number: 20110276202
    Abstract: The present invention relates to a friction device (11) for maintaining a control member (2, 8) in a determined position. The device comprises a contact part (16) movable between a declutched stable position and a clutched stable position, and vice versa. The clutched stable position corresponds to a position in which the contact part (16) bears against the control member (2, 8) in such a manner as to establish a determined friction force. An electromechanical drive means moves the contact part (16) between the two stable positions. The device includes remote control means for activating and deactivating the drive means.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 10, 2011
    Applicant: EUROCOPTER
    Inventors: Cédric Carlavan, Pascal Leguay
  • Patent number: 6142413
    Abstract: The present invention relates to a device for control of an aerodynamic steering surface (D) of a helicopter (He), which includes an anti-torque system intended to counteract the torque induced by a main forward-movement and lifting rotor (R1) and comprising an anti-torque rotor (R2) exerting an anti-torque lateral thrust and said aerodynamic steering surface (D), controllable and generating an anti-torque transverse lift.According to the invention, said device includes controls means (1A) for controlling said aerodynamic surface (D) in terms of speed, as a function of the difference between a helicopter (He) yaw control demand and a datum demand for the auxiliary rotor (R2), as long as said difference is not zero.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: November 7, 2000
    Assignee: Eurocopter
    Inventors: Andre-Michel Dequin, Valery Lionel Delisle, Pascal Leguay