Patents by Inventor Julien Lassalle
Julien Lassalle 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: 11827336Abstract: A system for controlling a propeller having a plurality of blades having a primary control system and a backup control system. The primary control system including a sensor responsive to a propeller state, and a controller connected to the sensor and to an electrohydraulic control actuator. The electrohydraulic control actuator is connected via a bypass valve to a hydraulic actuator that controls at least a blade angle of a blade of the propeller. The controller generating commands to the electrohydraulic control actuator based on at least the propeller state. The backup control system including a second controller, an electrohydraulic solenoid operably connected to the bypass valve. The backup control system is operable to hydraulically disable the primary control system via the bypass valve upon the occurrence of a selected condition, the second controller modulates the operation of the electrohydraulic solenoid to control the bypass actuator based on the propeller state.Type: GrantFiled: December 17, 2019Date of Patent: November 28, 2023Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Timothy Maver, Julien Lassalle, Thibaut Marger, Gregory Giddings, Charles L. DeGeorge, Stephen J. Bukowinski, Romain Bouloc
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Patent number: 11535363Abstract: There is provided an hydraulic actuation system for an aircraft, the hydraulic actuation system includes an actuator (A), a primary actuation arrangement to provide hydraulic fluid to control the actuator (A), wherein the hydraulic actuation system is configured to detect a fault in the actuator (A). The hydraulic actuation system also includes a secondary actuation arrangement to provide hydraulic fluid to control the actuator (A) in response to a detection of a fault in the actuator (A).Type: GrantFiled: December 19, 2019Date of Patent: December 27, 2022Assignee: RATIER-FIGEAC SASInventors: Julien Lassalle, Thibaut Marger
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Publication number: 20210009253Abstract: There is provided an hydraulic actuation system for an aircraft, the hydraulic actuation system includes an actuator (A), a primary actuation arrangement to provide hydraulic fluid to control the actuator (A), wherein the hydraulic actuation system is configured to detect a fault in the actuator (A). The hydraulic actuation system also includes a secondary actuation arrangement to provide hydraulic fluid to control the actuator (A) in response to a detection of a fault in the actuator (A).Type: ApplicationFiled: December 19, 2019Publication date: January 14, 2021Inventors: Julien LASSALLE, Thibaut MARGER
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Patent number: 10745111Abstract: A propeller hydraulic actuation system, includes a double-acting dual chamber hydraulic pitch change actuator. The pitch change actuator includes a first pressure circuit having first fluid supply lines and a first hydraulic chamber and a second pressure circuit having second fluid supply lines and a second hydraulic chamber. A piston separates the first and second chambers. At least one pressure sensor is provided for obtaining pressure measurements from which a load differential (F) applied to the piston by the circuits can be calculated. A closed loop controller is arranged to control the fluid supplied to the first and second pressure circuits, wherein the closed loop controller includes an actuator position loop arranged to utilise feedback on the actuator position to control the actuator position.Type: GrantFiled: March 17, 2017Date of Patent: August 18, 2020Assignee: RATIER-FIGEAC SASInventor: Julien Lassalle
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Patent number: 10717517Abstract: Disclosed herein is a hydraulic actuator system comprising a servoactuator including a hydraulic actuator and a control valve, wherein the supply of hydraulic fluid to the servoactuator from a fluid supply is adjustable through a control system based on feedback information relating to the servoactuator. The hydraulic actuator system may e.g. be used for controlling blade pitch in a variable pitch propeller system such as may be found on a turboprop aircraft or a ship.Type: GrantFiled: May 3, 2018Date of Patent: July 21, 2020Assignee: RATIER-FIGEAC SASInventors: Julien Lassalle, Thibaut Marger
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Publication number: 20200189721Abstract: A system for controlling a propeller having a plurality of blades having a primary control system and a backup control system. The primary control system including a sensor responsive to a propeller state, and a controller connected to the sensor and to an electrohydraulic control actuator. The electrohydraulic control actuator connected via a bypass valve to a hydraulic actuator that controls at least a blade angle of a blade of the propeller. The controller generating commands to the electrohydraulic control actuator based on at least the propeller state. The backup control system including a second controller, an electrohydraulic solenoid operably connected to the bypass valve. The backup control system operable to hydraulically disable the primary control system via the bypass valve upon the occurrence of a selected condition, the second controller modulates the operation of the electrohydraulic solenoid to control the bypass actuator based on the propeller state.Type: ApplicationFiled: December 17, 2019Publication date: June 18, 2020Inventors: Timothy Maver, Julien Lassalle, Thibaut Marger, Gregory Giddings, Charles L. DeGeorge, Stephen J. Bukowinski, Romain Bouloc
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Patent number: 10683082Abstract: An hydraulic actuation control module is provided for installation in a pitch change actuator of a propeller assembly. The module comprises a flow metering valve arranged to supply hydraulic fluid flow and pressure to an actuator and an electronic control unit arranged to control the flow metering valve. The flow metering valve is arranged to meter hydraulic fluid flow and pressure to increase and decrease pitch chambers of the pitch change actuator, in accordance with the control of the electronic control unit. The flow metering valve is arranged to receive an hydraulic fluid supply from an entity relative to which the propeller assembly rotates such as an engine driving the propeller assembly or aircraft on which the propeller assembly is installed. A propeller assembly comprising the hydraulic actuation control module is also disclosed, together with a method of installing the module within a propeller assembly.Type: GrantFiled: April 27, 2017Date of Patent: June 16, 2020Assignee: RATIER-FIGEAC SASInventor: Julien Lassalle
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Patent number: 10502055Abstract: The present disclosure relates to a downhole packer assembly that includes an outer skin, an inner packer disposed within the outer skin such that inflation of the inner packer is configured to expand the outer skin, a pair of mechanical fittings engaged with axial ends of the outer skin, and a ring assembly disposed within at least one of the pair of mechanical fittings. The ring assembly includes a shear pin configured to shear upon application of a tensile force to the downhole packer assembly.Type: GrantFiled: December 7, 2016Date of Patent: December 10, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Pierre-Yves Corre, Lambert Rouchon, Stéphane Metayer, Julien Lassalle
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Publication number: 20180327082Abstract: Disclosed herein is a hydraulic actuator system comprising a servoactuator including a hydraulic actuator and a control valve, wherein the supply of hydraulic fluid to the servoactuator from a fluid supply is adjustable through a control system based on feedback information relating to the servoactuator. The hydraulic actuator system may e.g. be used for controlling blade pitch in a variable pitch propeller system such as may be found on a turboprop aircraft or a ship.Type: ApplicationFiled: May 3, 2018Publication date: November 15, 2018Inventors: Julien LASSALLE, Thibaut MARGER
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Publication number: 20170313406Abstract: An hydraulic actuation control module is provided for installation in a pitch change actuator of a propeller assembly. The module comprises a flow metering valve arranged to supply hydraulic fluid flow and pressure to an actuator and an electronic control unit arranged to control the flow metering valve. The flow metering valve is arranged to meter hydraulic fluid flow and pressure to increase and decrease pitch chambers of the pitch change actuator, in accordance with the control of the electronic control unit. The flow metering valve is arranged to receive an hydraulic fluid supply from an entity relative to which the propeller assembly rotates such as an engine driving the propeller assembly or aircraft on which the propeller assembly is installed. A propeller assembly comprising the hydraulic actuation control module is also disclosed, together with a method of installing the module within a propeller assembly.Type: ApplicationFiled: April 27, 2017Publication date: November 2, 2017Inventor: Julien Lassalle
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Publication number: 20170267329Abstract: A propeller hydraulic actuation system, includes a double-acting dual chamber hydraulic pitch change actuator. The pitch change actuator includes a first pressure circuit having first fluid supply lines and a first hydraulic chamber and a second pressure circuit having second fluid supply lines and a second hydraulic chamber. A piston separates the first and second chambers. At least one pressure sensor is provided for obtaining pressure measurements from which a load differential (F) applied to the piston by the circuits can be calculated. A closed loop controller is arranged to control the fluid supplied to the first and second pressure circuits, wherein the closed loop controller includes an actuator position loop arranged to utilise feedback on the actuator position to control the actuator position.Type: ApplicationFiled: March 17, 2017Publication date: September 21, 2017Inventor: Julien LASSALLE
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Publication number: 20170159400Abstract: The present disclosure relates to a downhole packer assembly that includes an outer skin, an inner packer disposed within the outer skin such that inflation of the inner packer is configured to expand the outer skin, a pair of mechanical fittings engaged with axial ends of the outer skin, and a ring assembly disposed within at least one of the pair of mechanical fittings. The ring assembly includes a shear pin configured to shear upon application of a tensile force to the downhole packer assembly.Type: ApplicationFiled: December 7, 2016Publication date: June 8, 2017Inventors: Pierre-Yves Corre, Lambert Rouchon, Stéphane Metayer, Julien Lassalle