Patents by Inventor Jèrôme FRAVAL
Jèrôme FRAVAL 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: 11535367Abstract: An emergency braking method for aircraft, comprising using a progressing parking brake controlled by a lever (10) that can be actuated by the pilot between a “0%” position in which the brakes are connected to the return pressure of the aircraft, and a “100%” position in which the brakes are connected to the feed pressure of the aircraft, the lever being blockable in the 100% position in order to provide parking braking when the aircraft is stationary.Type: GrantFiled: June 12, 2019Date of Patent: December 27, 2022Assignee: SAFRAN LANDING SYSTEMSInventors: David Frank, Jérôme Fraval, Donny Warint
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Publication number: 20190382103Abstract: An emergency braking method for aircraft, comprising using a progressing parking brake controlled by a lever (10) that can be actuated by the pilot between a “0%” position in which the brakes are connected to the return pressure of the aircraft, and a “100%” position in which the brakes are connected to the feed pressure of the aircraft, the lever being blockable in the 100% position in order to provide parking braking when the aircraft is stationary.Type: ApplicationFiled: June 12, 2019Publication date: December 19, 2019Inventors: David FRANK, Jérôme Fraval, Donny Warint
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Patent number: 10005547Abstract: The invention relates to an aircraft undercarriage comprising: a strut (1) for connecting to the aircraft, a slide rod (3) slidably engaged in leaktight manner in the strut via the bottom opening, which rod carries at least one wheel at its bottom end, a diaphragm (7) carried by a support (8) attached to the top wall of the strut to cooperate in leaktight manner with an inside wall of the slide rod so as to define a first chamber (C1) under the diaphragm inside the rod and completely filled with hydraulic fluid, and a second chamber (C2) above the diaphragm and partially filled with hydraulic fluid, a throttle needle (10) secured to the slide rod and penetrating into a calibrated orifice (12) in the diaphragm so as to define a calibrated fluid passage between the first and second chambers, and angular connection means for imposing an angular position on the slide rod relative to the strut.Type: GrantFiled: May 11, 2016Date of Patent: June 26, 2018Assignee: MESSIER-BUGATTI-DOWTYInventors: Jerome Fraval, David Frank
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Publication number: 20160332726Abstract: The invention relates to an aircraft undercarriage comprising: a strut (1) for connecting to the aircraft, a slide rod (3) slidably engaged in leaktight manner in the strut via the bottom opening, which rod carries at least one wheel at its bottom end, a diaphragm (7) carried by a support (8) attached to the top wall of the strut to co-operate in leaktight manner with an inside wall of the slide rod so as to define a first chamber (C1) under the diaphragm inside the rod and completely filled with hydraulic fluid, and a second chamber (C2) above the diaphragm and partially filled with hydraulic fluid, a throttle needle (10) secured to the slide rod and penetrating into a calibrated orifice (12) in the diaphragm so as to define a calibrated fluid passage between the first and second chambers, and angular connection means for imposing an angular position on the slide rod relative to the strut.Type: ApplicationFiled: May 11, 2016Publication date: November 17, 2016Applicant: MESSIER-BUGATTI-DOWTYInventors: Jerome FRAVAL, David FRANK
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Patent number: 9169002Abstract: A method of managing a steering command for a steerable portion 3 of nose landing gear 2 of an aircraft 1. The method implements servo-control to servo-control of a steering actuator 6 to an angle position setpoint ?set for the steerable portion 3. The servo-control includes calculating an error ? by subtracting a reference angle ?est from the angle position setpoint ?set. The reference angle ?est is an angle determined by calculation as a function of a longitudinal speed Vlong and a yaw rate ? of the aircraft 1.Type: GrantFiled: February 27, 2013Date of Patent: October 27, 2015Assignee: MESSIER-BUGATTI-DOWTYInventors: Michael Benmoussa, David Poiret, Jerome Fraval
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Patent number: 8827202Abstract: A method of managing the steering of aircraft undercarriage wheels carried by a steerable bottom portion of the undercarriage, the bottom portion being associated with steering control including a steering member suitable for steering the bottom portion of the undercarriage in response to a steering order. The method comprises the steps of (1) monitoring the pressures of the tires carried by the wheels, and in response to detecting at least one of the following events: (1A) the pressure of one of the tires is less than a first predetermined threshold, and ( 1B) the difference between the pressures of two of the tires is greater than a second determined threshold; (2) activating the steering control, if the steering control is not activated; and (3) implementing a steering control relationship that is modified compared with a nominal control relationship used when the tires are properly inflated.Type: GrantFiled: July 11, 2012Date of Patent: September 9, 2014Assignee: Messier-Bugatti-DowtyInventors: Michael Benmoussa, Jerome Fraval
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Publication number: 20140156113Abstract: The invention relates to a method of managing a steering command for a steerable portion 3 of nose landing gear 2 of an aircraft 1, the method implementing servo-control to servo-control a steering actuator 6 to an angle position setpoint ?set for the steerable portion 3, the servo-control including calculating an error ? by subtracting a reference angle ?est from the angle position setpoint ?set. According to the invention, the reference angle ?est is an angle determined by calculation as a function of a longitudinal speed Vlong and a yaw rate ? of the aircraft 1.Type: ApplicationFiled: February 27, 2013Publication date: June 5, 2014Applicant: MESSIER-BUGATTI-DOWTYInventors: Michael BENMOUSSA, David POIRET, Jerome FRAVAL
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Patent number: 8528600Abstract: The invention relates to a hydraulic valve comprising a body in which a bore is formed in order to receive a sleeve that includes sealing seats that cooperate with a wall of the bore to define hydraulically isolated chambers that are connected to hydraulic ports in the body, the sleeve including connection holes in order to connect at least certain chambers with the inside of the sleeve and receiving a movable element that is slidable between two end positions in order to slide in leaktight manner against an inside wall of the sleeve, wherein the sleeve includes at least one regulator hole that opens out inside the sleeve in such a manner as to be the first bore to be uncovered or the last bore to be blocked by one of the fitted portions of the movable element when said element slides from one position to another, said fitted portion having at least one face portion that presents a setback that passes over the regulator hole.Type: GrantFiled: June 3, 2011Date of Patent: September 10, 2013Assignee: Messier-Bugatti-DowtyInventors: Xavier Jubert, Jérôme Fraval, Sébastien Meziane, Sébastien Ernis
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Publication number: 20130015290Abstract: The invention relates to a method of managing the steering of aircraft undercarriage wheels carried by a steerable bottom portion of the undercarriage, the bottom portion being associated with steering control including a steering member suitable for steering the bottom portion of the undercarriage in response to a steering order. According to the invention, the method comprises the steps of: monitoring the pressures of the tires carried by the wheels, and in response to detecting at least one of the following events: the pressure of one of the tires is less than a first predetermined threshold; and the difference between the pressures of two of the tires is greater than a second determined threshold; activating the steering control, if the steering control is not activated; and implementing a steering control relationship that is modified compared with a nominal control relationship used when the tires are properly inflated.Type: ApplicationFiled: July 11, 2012Publication date: January 17, 2013Applicant: MESSIER-BUGATTI-DOWTYInventors: Michael BENMOUSSA, Jerome FRAVAL
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Publication number: 20110297262Abstract: The invention relates to a hydraulic valve comprising a body in which a bore is formed in order to receive a sleeve that includes sealing seats that cooperate with a wall of the bore to define hydraulically isolated chambers that are connected to hydraulic ports in the body, the sleeve including connection holes in order to connect at least certain chambers with the inside of the sleeve and receiving a movable element that is slidable between two end positions in order to slide in leaktight manner against an inside wall of the sleeve, wherein the sleeve includes at least one regulator hole that opens out inside the sleeve in such a manner as to be the first bore to be uncovered or the last bore to be blocked by one of the fitted portions of the movable element when said element slides from one position to another, said fitted portion having at least one face portion that presents a setback that passes over the regulator hole.Type: ApplicationFiled: June 3, 2011Publication date: December 8, 2011Applicant: MESSIER-BUGATTI-DOWTYInventors: Xavier JUBERT, Jèrôme FRAVAL, Sébastien MEZIANE, Sébastien ERNIS