Patents Assigned to Messier-Bugatti-Dowty
  • ELECTROMECHANICAL ACTUATOR FOR VEHICLE BRAKE AND BRAKING SYSTEM COMPRISING SUCH AN ACTUATOR
    Publication number: 20150136543
    Abstract: The invention relates to an electromechanical actuator for a vehicle brake comprising a body (4) in which are arranged an electric motor (5) and a threaded plunger cooperating via a helical link with a nut (8) driven in rotation by the electric motor (5). According to the invention, the nut (8) is mounted to move axially in the body (4) of the actuator between a rest position towards which the nut (8) is pushed back by elastic means, and an active position towards which the nut is displaced against the elastic means when a braking force is applied, the actuator further comprising means for detecting the axial displacement of the nut.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 21, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Franck SELLES, Eric EVENOR, Nathanael RICHARD
  • BRAKING ACTUATOR FOR A HYDRAULIC BRAKE OF AN AIRCRAFT WHEEL
    Publication number: 20150122595
    Abstract: A braking actuator for a hydraulic aircraft brake, received in a cavity of a ring of the brake. The actuator comprises a liner structure (1) sealed in the cavity of the ring, and a piston (3) slidably mounted in the liner structure to apply a braking force. A wear-compensating device (10) defines a retreated position of the piston in the liner structure by an axially movable stop (11) which can be advanced by the piston during the application of a braking force and in frictional relationship with a fixed part (18) of the wear-compensating device secured to the liner. An elastic member (24) returns the piston to the retreated position defined by the piston bearing against the movable stop, the movable stop being in frictional relationship with the fixed part via at least one telescopic intermediate element (16) interposed between the movable stop (11) and the fixed part (18).
    Type: Application
    Filed: October 31, 2014
    Publication date: May 7, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Jacques BUSSIERE, Vincent GONZALEZ, Marie-Laure DE CRESCENZO
  • BRAKE ACTUATOR FOR AIRCRAFT WHEEL HYDRAULIC BRAKE
    Publication number: 20150122594
    Abstract: A brake actuator for an aircraft hydraulic brake, insertable in a cavity of a brake ring. The actuator comprises a liner (1) designed to be housed sealingly in the cavity of the ring, a piston (3) mounted to slide sealingly in the liner along an axis of sliding (X) so as to apply a braking force when a fluid is introduced under pressure into the cavity, and a wear compensation device (10) which defines a position to which the piston retreats into the liner by means of mobile stop (11) that can be moved forward by the piston as a braking force is applied. An elastic return member (16) returns the piston towards the position of retreat bearing against the mobile stop. The wear compensation device extends between the liner and the piston, downstream of a seal extending between the liner and the piston so as not to be bathed in the fluid in the cavity, the stop being held still by friction on the liner.
    Type: Application
    Filed: October 30, 2014
    Publication date: May 7, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Robin LUCIENNE, Christophe VERDURMEN
  • Method of controlling a vehicle brake with adaptive torque correction
    Patent number: 9026332
    Abstract: The invention relates to a method of controlling a vehicle brake adapted to exert a braking force in response to an actuation setpoint, in which: from a braking setpoint including low frequency components and high frequency components, a nominal actuation setpoint is determined for the brake actuator that takes account of all of the components of the braking setpoint; from the same braking setpoint, and from a measurement of the torque developed by the brake, a correction for the nominal actuation setpoint is determined, the correction taking account only of low frequency variations in the braking setpoint, the correction being adapted to take account of current or future operating conditions of at least said brake or of brakes subjected to the same braking setpoint; and the correction is added to the nominal setpoint.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: May 5, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventor: Dominique Onfroy
  • Method of controlling a cooling device for a machine tool
    Patent number: 9008847
    Abstract: A method of controlling a cooling device for cooling a cutting tool in a machine tool. The method comprising the steps of: controlling the motor to drive the pump in such a manner that the pump feeds the nozzle with machining fluid at a constant flow rate D1 that is equal to a first flow rate setpoint; measuring a parameter P representative of a fluid outlet pressure from the nozzle; and comparing an estimated outlet pressure Pestim as estimated from the parameter P with a first predetermined pressure threshold Ps1, and controlling the motor so as to increase the fluid flow rate D1 as delivered by the pump if the estimated output pressure drops below the first pressure threshold Ps1.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: April 14, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventors: Denis Clausmann, Laurent Augelmann, Claude Kehren, Christophe Joubert
  • Hydraulic brake architectures for aircrafts for braking at least one wheel of the aircraft
    Patent number: 8998348
    Abstract: Aircraft hydraulic parking architecture, including a brake with a wheel braking hydraulic actuator, a pressure source (Alim) of high-pressure fluid, a normal braking hydraulic circuit (C1) including at least pressure control servo valve with a supply port (P) connected to the pressure source (Alim), a return port (R), a utilization port (U) connected to the actuator, the brake architecture further including a parking hydraulic circuit (C2) including a parking brake valve (PkBV) having an outlet port (Ps1) selectively connected either to the pressure source (Alim) or a low-pressure return circuit (CR). The outlet port (Ps1) of the parking brake valve (PkBV) is connected to the return port (R) of the pressure control servo valve.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: April 7, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventor: David Frank
  • TELESCOPIC ACTUATOR
    Publication number: 20150075361
    Abstract: The invention relates to a telescopic actuator comprising a rod (4), a hollow lead screw (5), a fixed piston (9) comprising a first tail (10) which extends in the lead screw (5) and a head (11). According to the invention, the actuator comprises a first hydraulic connection channel (16) extending through the first tail (10) to fluidically connect a first chamber (C1) with a source of hydraulic fluid (17), and the channel (16) comprises first damping means suitable for slowing down the rod (4) when the latter is depressed by regulating a hydraulic fluid flow rate in the first channel provoked by the depression of the rod.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 19, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Nicolas MORETTI, Sébastien MEZIANE, Gérard BALDUCCI
  • Method for manufacturing an arm in composite material comprising a transversal bearing designed to receive a fixed or rotating shaft
    Patent number: 8980032
    Abstract: The invention relates to a method for manufacturing an arm (16) in composite material, this arm comprising a main body incorporating a bearing (22) designed to receive a shaft passing through it transversely, this method comprising the steps of: manufacturing a hub (11) by winding reinforcing fibers around a generally tubular support (12); manufacturing at least one sleeve (14); attaching the hub (11) to one end of the sleeve (14) and transversely to the sleeve (14) in order to form a mandrel; applying one or more layers of braided reinforcing fibers (21) around this mandrel with a machine for braiding reinforcing fibers (19); injecting and polymerizing resin into the layer or layers of braided fibers (21). The invention applies notably to an arm forming an undercarriage rocker arm of an aircraft.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: March 17, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventors: Richard Masson, Patrick Dunleavy
  • Tool for removing annular elements tightly mounted in holes, in particular blind holes, of parts
    Patent number: 8978222
    Abstract: A removal tool which exerts an axial pull on an annular element including a tie rod with a widened end head adapted to be inserted in the coaxial passage of the annular element, beyond the annular element, and a mechanism for engaging with the element in a form of an annular cage with lateral prongs capable of deforming elastically in the radial direction, passing through the axial passage to engage via the elastic prongs thereof with the distal transverse surface of the element and to allow the element to be removed by the engagement of the widened head with the prongs, following the axial movement of the tie rod outside of the hole by a control mechanism.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: March 17, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventors: Antoine Ferreira, Rene Petuya, Yannig Vaillant
  • Active element for an electromagnetic machines, a method of fabricating such an active element, and an electromagnetic machine including such an active element
    Patent number: 8981604
    Abstract: The invention provides an active element for an electromagnetic machine, the element comprising an alternating succession in a main direction of portions presenting a first magnetic property and of portions presenting a second magnetic property, wherein the element includes a non-magnetic covering that is thin relative to a thickness of the portions and that extends to cover a substantial fraction of an outside surface of the active element, the covering being secured to at least some of the portions and presenting sufficient strength to form a member for mechanically transmitting the magnetic forces to which the portions are subjected.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: March 17, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventors: Nicolas Ziegler, Daniel Matt
  • Equipment for measuring the inflation pressure of a tire of a vehicle wheel
    Patent number: 8978459
    Abstract: Measurement equipment for measuring the inflation pressure of a tire of a vehicle wheel 1. The equipment comprises a body 16 defining an internal volume, a communication orifice 19 for putting the inside volume of the body 16 into communication with an inflation chamber situated between a rim 2 and a tire of the wheel and containing an inflation gas and an indicator member 25 slidably mounted in the body 16 so as to define a gastight separation between a first chamber 26 containing a given quantity of a reference gas and a second chamber 27 into which the communication orifice 19 leads. As a result, the indicator member 25 is subjected to opposing pressures that exist in each of the chambers. A position-identification device 30 is operative to identify the position of the indicator member in the body.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: March 17, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventor: David Frank
  • Method for braiding reinforcing fibers with variation in the inclination of the braided fibers
    Patent number: 8960065
    Abstract: A method of braiding reinforcing fibers on a mandrel (8) with a machine having a ring (9) carrying at least two series of reels of fibers, by moving the mandrel at a predetermined forward speed while moving the two series of reels along the ring (9) so that they cross while rotating in opposite directions and at a predetermined speed of rotation about an axis (AX) of the ring. The braid is formed on the mandrel (8) in the vicinity of a region of convergence (R) of the fibers that together define a conical shape (C). The method comprises: a step of reconfiguring the machine in which the angle (a2) at the apex of the cone (C) defined by the fibers takes on a new value (a2); and a step of restarting braiding in which the movement of the reels along the ring (9) and the forward movement of the mandrel (8) are re-established with a new speed of rotation and a new speed of advance.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: February 24, 2015
    Assignees: Messier-Bugatti-Dowty, Aircelle
    Inventors: Richard Masson, Bertrand Desjoyeaux, Romain Boudier
  • Method of fabricating a friction part based on C/C composite material
    Patent number: 8956480
    Abstract: The carbon-carbon composite material is obtained by densification with a pyrolytic carbon matrix originating from a precursor in gaseous state at least in a main external phase of the matrix, and, at the end of the densification, final heat treatment is performed at a temperature lying in the range 1400° C. to 1800° C.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: February 17, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventors: Jean-Marie Jouin, Eric Lherm, Philippe Turgis
  • Electromechanical braking system for an aircraft
    Patent number: 8948994
    Abstract: The invention relates to an aircraft braking system having brakes with electromechanical braking actuators (103) adapted to press selectively against associated stacks of disks in order to generate a braking torque on associated wheels of the aircraft; at least one control module (130) receiving braking setpoints and responding by generating a braking command (121); and at least one power module (120) responding to the braking command by delivering AC power to the motors of actuators connected to the power module so that the motors develop a braking force corresponding to the braking setpoints. According to the invention, the control module includes a digital processor stage (131) and an analog processor unit (135).
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: February 3, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventor: David Frank
  • DEVICE FOR DRIVING AN AIRCRAFT WHEEL IN ROTATION
    Publication number: 20150027256
    Abstract: The invention relates to a device for driving rotation of an aircraft wheel comprising a rim (4) mounted to rotate on an axle (2) of landing gear about an axis of rotation (X), the device comprising a drive ring gear (103) and a drive actuator (101) having an outlet pinion (102) that co-operates with the drive ring gear to drive the wheel in rotation. The drive ring gear is mounted to rotate about the axis of the rim of the wheel, the drive device including selective coupling means (150) that are operable to link the rim and the drive ring gears together in rotation, or to disconnect them.
    Type: Application
    Filed: July 22, 2014
    Publication date: January 29, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Fernand RODRIGUES, Nicolas MAZARGUIL
  • CONTROL BOX
    Publication number: 20150021432
    Abstract: The invention provides a control box for selectively delivering orders to receivers (8, 12), the control box comprising: a shaft (14) mounted to turn about an axis of rotation (X), while being capable of sliding along said axis (X) between a rest position towards which it is urged by return means (24), and an active position; order delivery means (16, 11) co-operating with the shaft (14) to deliver orders as a function of the angular position of the shaft (14); rotary drive means (15) for causing the shaft to turn; and safety actuation means (23) for causing the shaft to slide from the rest position in which anti-rotation means (27, 28) prevent the shaft from turning to the active position in which the anti-rotation means (27, 28) leave the shaft free to turn under drive from the rotary drive means (15).
    Type: Application
    Filed: October 9, 2014
    Publication date: January 22, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventor: Gilbert LECOURTIER
  • ELECTROMECHANICAL ACTUATOR
    Publication number: 20150015127
    Abstract: An electromechanical actuator comprising an actuator member and an electric motor (2) adapted to drive the actuator member. The electric motor (2) comprises a rotor portion (4), a stator portion (5) comprising a yoke-forming body (9) and a set of coils received in slots (12) in the body (9), and at least one electrical module (17). The electrical module is adapted to generate an electrical power supply current (Ia) for the electric motor (2), which current flows in the set of coils. The electrical module (17) is carried by the body (9).
    Type: Application
    Filed: July 11, 2014
    Publication date: January 15, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Florent NIERLICH, Etienne ANNEE, Raphael PIERRA
  • Method of making a three-dimensional fiber preform for fabricating an annular part out of carbon/carbon composite material
    Patent number: 8931148
    Abstract: A method of making a three-dimensional fiber preform for fabricating an annular part out of carbon-carbon composite material, the method including stacking layers of a fiber sheet made up of carbon yarns or tows, needling the layers one by one as they are superposed so as to bond them together, and locally modifying the electromagnetic properties of the fiber preform by increasing the fiber density of the layers of the fiber sheet that are situated at half-thickness of the fiber preform.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: January 13, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventors: Vincent Delecroix, Kenny Chang
  • RACK STEERING CONTROL PISTON
    Publication number: 20150000433
    Abstract: The invention relates to a steering actuator piston with a rack (6) for an aircraft landing gear (1) characterized in that the piston comprises a body (10) made of a lightweight alloy having an externally threaded main span (11) terminated on one side by a shoulder (12) and extended on the other side by a skirt (13), the body having screwed to it a tapped bronze bushing having on its outer wall at least one groove for receiving a seal, the skirt having a drilling to receive a pin for securing the piston to the rack, the bushing extending in service between the shoulder and the pin so that it is retained axially between the shoulder and the pin.
    Type: Application
    Filed: February 6, 2013
    Publication date: January 1, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventor: Marc Farcy
  • METHOD OF USING AND RENOVATING A DISK FROM A STACK OF DISKS
    Publication number: 20150001009
    Abstract: The invention relates to a method of using and renovating a brake disk (9), the method comprising steps of using the disk in a plurality of lives and compensating for a reduction in the thickness of the disk after each life by assembling the disk with a complementary portion or by associating the disk with another disk of rotor or stator type if the disk is itself respectively of stator or rotor type.
    Type: Application
    Filed: June 25, 2014
    Publication date: January 1, 2015
    Applicant: MESSIER-BUGATTI-DOWTY
    Inventors: Pierre CHAMBARD, Jean-Baptiste VANEY