Patents Assigned to Messier-Dowty SA
-
Publication number: 20100187353Abstract: The invention relates to a shock-absorber for aircraft landing gear, the shock-absorber having two elements (1, 2) mounted to slide telescopically one in the other and defining an internal volume that is filled with hydraulic fluid and with gas, the internal volume being separated into at least two chambers (7, 8) by a separation (5) including at least one throttling orifice (10) through which the hydraulic fluid passes from one chamber to the other while the shock-absorber is being compressed. According to the invention, the separation includes at least one degassing orifice to enable gas to be transferred from one chamber to the other when the landing gear is in the deployed position, the degassing orifice being offset vertically relative to the throttling orifice so as to be located above it when the landing gear is in the deployed position.Type: ApplicationFiled: June 12, 2008Publication date: July 29, 2010Applicant: MESSIER-DOWTY SAInventors: Richard Masson, Stephane Picard
-
Publication number: 20100141189Abstract: The invention relates to a power supply having two inverters (A, B) in series for powering an electromechanical actuator having an electric motor including a plurality of windings (R1, R2, R3) forming phases, each inverter being connected to its own ground (50; 51) and having a voltage source (U1; U2) having as many arms (A1, A2, A3; B1, B2, B3) as there are windings to be powered, each arm including two controlled switches (5, 6) connected in series, with a point therebetween being provided for connection to one end of one of the windings. According to the invention, each inverter includes an additional arm (A4; B4) having two controlled switches, the two additional arms being interconnected by a bridge (7) that is connected to each of the additional arms at a point that is situated between the switches.Type: ApplicationFiled: December 7, 2007Publication date: June 10, 2010Applicant: MESSIER-DOWTY SAInventors: Daniel Matt, Julien Jac, Nicolas Ziegler
-
Patent number: 7704429Abstract: The invention relates to a method of fabricating a composite material connecting rod, the method comprising the step of cutting out a pattern presenting two opposite edges from a composite fiber fabric made up of a plurality of superposed primary plies that are bonded together in such a manner that the primary plies can slide relative to one another, rolling the pattern into a tube in such a manner that the primary plies slide relative to one another to give a chamfer shape to the two edges, and joining together the chamfer-shaped edges so that they overlap.Type: GrantFiled: November 13, 2006Date of Patent: April 27, 2010Assignee: Messier-Dowty SAInventor: Patrick Dunleavy
-
Publication number: 20100096067Abstract: The invention relates to a method of making at least one stiffener element, the method comprising steps of: cutting out two substantially identical elongate flanks (2, 4) from fiber plates, each flank presenting two lateral projections (10, 14) on either side of a central portion (6); superposing the flanks (2, 4) and stitching them together along two parallel lines (8, 12) that mark the boundaries between the lateral projections and the central portions; and folding the lateral projections (10, 14) along the lines of stitching to either side of the assembly as formed in this way in order to form flanges (22, 24).Type: ApplicationFiled: March 7, 2008Publication date: April 22, 2010Applicant: MESSIER-DOWTY SAInventor: Patrick Dunleavy
-
Patent number: 7601288Abstract: The invention provides a method of fabricating a lug on a structural element of composite material made at least locally out of a stack of primary plies of composite fibers defining at least one extension for forming the lug. The method includes the step of separating the primary plies at least in the extension and of inserting intermediate plies between the primary plies.Type: GrantFiled: November 13, 2006Date of Patent: October 13, 2009Assignee: Messier-Dowty SAInventor: Patrick Dunleavy
-
Publication number: 20090223588Abstract: The invention provides a method of fabricating a lug on a structural element of composite material made at least locally out of a stack of primary plies of composite fibers defining at least one extension for forming the lug. The method includes the step of separating the primary plies at least in the extension and of inserting intermediate plies between the primary plies.Type: ApplicationFiled: November 13, 2006Publication date: September 10, 2009Applicant: MESSIER-DOWTY SAInventor: Patrick DUNLEAVY
-
Publication number: 20090218444Abstract: The invention relates to a telescopic shock absorber for an aircraft undercarriage, the shock absorber comprising a strut (1) in which a rod (2) is mounted to slide, the shock absorber including controlled retraction means (41 . . . 43) for retracting the rod into the strut to a retracted position. The shock absorber includes positive retention means (27, 29) for retaining the rod in the strut and adapted to retain the rod in the retracted position when the rod is moved thereto by the retraction means, the positive retention means being arranged, at least in the event of a severe landing of the aircraft, to allow the rod to be pushed into the strut beyond the retracted position.Type: ApplicationFiled: October 23, 2006Publication date: September 3, 2009Applicant: MESSIER-DOWTY SAInventors: Andre Lahargou, Marc Brune, Alain Robuchon
-
Publication number: 20090176078Abstract: A method and apparatus for reducing the noise generated by an aircraft undercarriage when the aircraft is flying and the undercarriage is deployed, includes coating at least a portion of a structural element of the undercarriage in a material that is of lower density than the material of the structural element in order to give this portion an aerodynamic shape suitable for smoothing a stream of air flowing around the portion.Type: ApplicationFiled: April 4, 2008Publication date: July 9, 2009Applicant: MESSIER-DOWTY SAInventors: CHRISTELLE SEROR, YANN GOERGER
-
Publication number: 20090057485Abstract: The invention relates to a wind-brace device for an aircraft undercarriage, the device comprising a hinged brace movable between a folded position and a stabilization position for stabilizing the undercarriage in the deployed position, a stabilizer member for stabilizing the brace comprising two hinged-together arms, one of the arms having one end hinged to the brace about a hinge axis, and a spring member for urging the arm of the stabilizer member towards the locked position. The spring member is connected to a lever hinged to the brace, the lever presenting a slot in which there is engaged a finger secured to the arm that is hinged to the brace.Type: ApplicationFiled: May 2, 2008Publication date: March 5, 2009Applicant: MESSIER-DOWTY SAInventors: Christelle Seror-Goguet, Laurent Martinez
-
Patent number: 7426983Abstract: A damper for an airplane landing gear leg comprises a main strut (11) and a rod piston (13) co-operating with the strut (11) to define a main chamber (15) and annular chamber (16) for hydraulic fluid, and presenting internally two adjacent chambers (19, 20) that are isolated from each other by a separator piston (21). The damper (10) further comprises a first secondary strut (26) telescopically Slidable on the above-mentioned rod piston (13), and a second secondary strut (37) telescopically slidable on the other end of the first secondary strut (26). The two second annular chambers (31, 40) as defined in this way are respectively connected to associated control circuits thus enabling the total length of the damper to be shortened or lengthened respectively for the purpose of causing the landing gear to contract or to be extended.Type: GrantFiled: December 29, 2003Date of Patent: September 23, 2008Assignee: Messier-Dowty SAInventors: Dominique Ducos, Jean-François Locufier, Ian Bennett, David Smart
-
Publication number: 20080111023Abstract: The invention provides a telescopic member comprising a cylinder in which a rod carrying a piston is mounted to slide telescopically, the telescopic member including internal abutment means that are overridable over a predetermined force when the rod comes into abutment inside the cylinder in the shortening direction, wherein the internal abutment means comprise an abutment piece extending in an open bore within the rod and projecting therefrom, the abutment piece being held to the rod via a pin.Type: ApplicationFiled: November 13, 2007Publication date: May 15, 2008Applicant: MESSIER-DOWTY SAInventors: ANDRE LAHARGOU, MARC BRUNE
-
Publication number: 20080111022Abstract: The invention relates to a shock absorber for an aircraft undercarriage, the shock absorber comprising a main cylinder in which a rod is mounted to slide telescopically, the shock absorber having one or more pneumatic chambers filled with gas, a supply of hydraulic fluid, and throttle means for throttling the hydraulic fluid such that when the shock absorber is shortened, the gas in the pneumatic chamber(s) is compressed and the hydraulic fluid is throttled, in which the pneumatic chamber(s) is/are fully contained in one or more auxiliary cylinders external to the main cylinder, and in each of which a sealed piston is slidably mounted to separate a pneumatic chamber contained in said external auxiliary cylinder from a fluid chamber in fluid flow communication with the main cylinder. According to the invention, the throttle means are disposed at the inlet of a fluid flow connection between the main cylinder and the auxiliary cylinder(s).Type: ApplicationFiled: November 13, 2007Publication date: May 15, 2008Applicant: MESSIER-DOWTY SAInventors: ANDRE LAHARGOU, MARC BRUNE
-
Publication number: 20070137778Abstract: The invention relates to a method of fabricating a composite material connecting rod, the method comprising the step of cutting out a pattern presenting two opposite edges from a composite fiber fabric made up of a plurality of superposed primary plies that are bonded together in such a manner that the primary plies can slide relative to one another, rolling the pattern into a tube in such a manner that the primary plies slide relative to one another to give a chamfer shape to the two edges, and joining together the chamfer-shaped edges so that they overlap.Type: ApplicationFiled: November 13, 2006Publication date: June 21, 2007Applicant: MESSIER-DOWTY SAInventor: PATRICK DUNLEAVY
-
Patent number: 7204456Abstract: A landing gear includes a shock absorber having first and second elements slidable relative to each other, the slidable elements defining an inside volume which is filled in part with hydraulic fluid so as to leave a first chamber filled with gas under pressure and located at the end of one of the slidable elements. A vessel filled with gas under pressure is housed in the end and is provided with a shutter member that is initially in a closed state and that is suitable for taking up a stable open state when the pressure in the first chamber exceeds the pressure in the vessel by a predetermined threshold amount.Type: GrantFiled: March 11, 2005Date of Patent: April 17, 2007Assignee: Messier-Dowty SAInventors: Maud Courtois, Sébastien Gautrain, Marc Gillet, Laurent Martinez
-
Publication number: 20060163427Abstract: A damper for an airplane landing gear leg comprises a main strut (11) and a rod piston (13) co-operating with the strut (11) to define a main chamber (15) and annular chamber (16) for hydraulic fluid, and presenting internally two adjacent chambers (19, 20) that are isolated from each other by a separator piston (21). The damper (10) further comprises a first secondary strut (26) telescopically slidable on the above-mentioned rod piston (13), and a second secondary strut (37) telescopically slidable on the other end of the first secondary strut (26). The two second annular chambers (31, 40) as defined in this way are respectively connected to associated control circuits thus enabling the total length of the damper to be shortened or lengthened respectively for the purpose of causing the landing gear to contract or to be extended.Type: ApplicationFiled: December 29, 2003Publication date: July 27, 2006Applicant: Messier-Dowty SaInventors: Dominique Ducos, Ian Bennett, David Smart
-
Patent number: 7007891Abstract: Retractable landing gear for an aircraft, the landing gear being of the type that is raised vertically, and comprising a plurality of independent legs, each leg comprising a structural part rigidly secured to a structure of the aircraft, a pivoting rocker beam supporting a pair of wheels, and a shock absorber. In accordance with the invention, the shock absorber of each leg is extended by a positioning portion enabling the total length of the extended shock absorber to be shortened in order to collapse the leg, and each leg further comprises a positioning actuator connected in hinged manner to the extended shock absorber and arranged to lengthen relative to a normal use position in order to lengthen the corresponding leg. This makes it possible to shorten and/or lengthen one or another of the legs of the landing gear while the aircraft is stationary or taxiing slowly.Type: GrantFiled: July 1, 2004Date of Patent: March 7, 2006Assignee: Messier-Dowty SAInventors: Dominique Ducos, Jean-François Locufier
-
Publication number: 20050230887Abstract: The invention relates to landing gear including a shock absorber having fist and second elements slidable relative to each other, the slidable elements defining an inside volume which is filled in part with hydraulic fluid so as to leave a first chamber filled with gas under pressure and located at the end of one of the slidable elements. According to the invention, a vessel filled with gas under pressure is housed in the end and is provided with a shutter member that is initially in a closed state and that is suitable for taking up a stable open state when the pressure in the first chamber exceeds the pressure in the vessel by a predetermined threshold amount.Type: ApplicationFiled: April 19, 2005Publication date: October 20, 2005Applicant: MESSIER-DOWTY SAInventors: Laurent Martinez, Marc Gillet, Sebastien Gautrain, Maud Courtois
-
Patent number: D623579Type: GrantFiled: September 18, 2009Date of Patent: September 14, 2010Assignee: Messier-Dowty SAInventor: Richard Masson
-
Patent number: D623580Type: GrantFiled: September 18, 2009Date of Patent: September 14, 2010Assignee: Messier-Dowty SAInventor: Richard Masson
-
Patent number: D623581Type: GrantFiled: September 18, 2009Date of Patent: September 14, 2010Assignee: Messier-Dowty SAInventor: Richard Masson