Patents by Inventor Stephen Yibum Chung
Stephen Yibum Chung 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: 11899451Abstract: In one embodiment, a remote controller for a vehicle includes at least one control element for controlling operation of at least one aspect of the vehicle when the vehicle is in a remote-control mode; an actuator connected the at least one control element for controlling a position of the at least one control element when the vehicle is in an autonomous operations mode; and a processing system for receiving a first control signal from the vehicle indicative of a state of operation of the vehicle. In operation, the processing system generates a second control signal to the actuator to cause the actuator to control a position of the control element such that it corresponds to and indicates the state of operation of the vehicle.Type: GrantFiled: December 5, 2022Date of Patent: February 13, 2024Assignee: Textron Innovations, Inc.Inventors: Stephen Yibum Chung, Russell C. Peters, Andrew Vincent Louis
-
Patent number: 11781544Abstract: A rotor system comprising a driveshaft; at least one motor for providing rotational energy for the driveshaft; an overrunning clutch connected to the motor and disposed around the driveshaft, wherein the overrunning clutch is rotated by the at least one motor; and a pump assembly associated with the at least one motor, the pump assembly comprising a large bore through which the driveshaft passes such that the pump assembly is arranged concentric to the driveshaft, the pump assembly further comprising a gerotor pump comprising inner and outer gerotor pump gears, wherein an inner bore of the gerotor pump engages and is driven by the overrunning clutch; and a cover disposed over the gerotor pump for providing a sump for the gerotor pump.Type: GrantFiled: October 20, 2020Date of Patent: October 10, 2023Assignee: TEXTRON INNOVATIONS INC.Inventors: Grant Beall, Stephen Yibum Chung
-
Publication number: 20230104255Abstract: In one embodiment, a remote controller for a vehicle includes at least one control element for controlling operation of at least one aspect of the vehicle when the vehicle is in a remote-control mode; an actuator connected the at least one control element for controlling a position of the at least one control element when the vehicle is in an autonomous operations mode; and a processing system for receiving a first control signal from the vehicle indicative of a state of operation of the vehicle. In operation, the processing system generates a second control signal to the actuator to cause the actuator to control a position of the control element such that it corresponds to and indicates the state of operation of the vehicle.Type: ApplicationFiled: December 5, 2022Publication date: April 6, 2023Applicant: Textron Innovations Inc.Inventors: Stephen Yibum Chung, Russell C. Peters, Andrew Vincent Louis
-
Patent number: 11565803Abstract: One embodiment is an electric drive system including a plurality of redundant motors, wherein power generated by the plurality of motors is used to drive a rotor system comprising a rotor shaft having a plurality of rotor blades connected thereto via a swashplate; a gear box associated with the plurality of redundant motors; a cyclic actuation system for controlling an individual pitch of the rotor blades connected to the swashplate; and at least one structural element for retaining the redundant motors, the gear box, and the cyclic actuation system together as a single integrated unit.Type: GrantFiled: March 4, 2020Date of Patent: January 31, 2023Assignee: TEXTRON INNOVATIONS INC.Inventors: William Kyle Heironimus, Stephen Yibum Chung
-
Patent number: 11554859Abstract: One embodiment is an electric drive system for an aircraft including a motor, a gear box associated with the motor, and a cooling fan for drawing air into the unit across an electronic component to cool the electronic component and for expelling air into an oil cooler for cooling oil contained therein. The electric drive system further includes an oil distribution system for distributing oil cooled by the oil cooler to at least one motor and at least one gearbox, the distributed oil being used to cool the motor and the gearbox, a reservoir for collecting the distributed oil after it has been used to cool the motor and the gearbox, and at least one structural element for retaining the motor, gearbox, the cooling fan, the oil distribution system, and the reservoir together as a unit.Type: GrantFiled: March 4, 2020Date of Patent: January 17, 2023Assignee: TEXTRON INNOVATIONS INC.Inventors: William Kyle Heironimus, Stephen Yibum Chung
-
Patent number: 11543819Abstract: In one embodiment, a remote controller for a vehicle includes at least one control element for controlling operation of at least one aspect of the vehicle when the vehicle is in a remote-control mode; an actuator connected the at least one control element for controlling a position of the at least one control element when the vehicle is in an autonomous operations mode; and a processing system for receiving a first control signal from the vehicle indicative of a state of operation of the vehicle. In operation, the processing system generates a second control signal to the actuator to cause the actuator to control a position of the control element such that it corresponds to and indicates the state of operation of the vehicle.Type: GrantFiled: February 25, 2019Date of Patent: January 3, 2023Assignee: TEXTRON INNOVATIONS INC.Inventors: Stephen Yibum Chung, Russell C. Peters, Andrew Vincent Louis
-
Patent number: 11472544Abstract: One embodiment is an electric drive system for an aircraft comprising a plurality of redundant motors, wherein power generated by the plurality of motors is used to drive a rotor system comprising a rotor shaft having a plurality of rotor blades connected thereto; a gear box associated with the plurality of redundant motors; a collective actuator for controlling a collective pitch of the rotor blades connected to the rotor shaft; and at least one structural element for retaining the redundant motors, the gear box, and the collective actuator together as a single integrated unit.Type: GrantFiled: March 4, 2020Date of Patent: October 18, 2022Assignee: Textron Innovations Inc.Inventors: William Kyle Heironimus, Stephen Yibum Chung
-
Publication number: 20220120261Abstract: A rotor system comprising a driveshaft; at least one motor for providing rotational energy for the driveshaft; an overrunning clutch connected to the motor and disposed around the driveshaft, wherein the overrunning clutch is rotated by the at least one motor; and a pump assembly associated with the at least one motor, the pump assembly comprising a large bore through which the driveshaft passes such that the pump assembly is arranged concentric to the driveshaft, the pump assembly further comprising a gerotor pump comprising inner and outer gerotor pump gears, wherein an inner bore of the gerotor pump engages and is driven by the overrunning clutch; and a cover disposed over the gerotor pump for providing a sump for the gerotor pump.Type: ApplicationFiled: October 20, 2020Publication date: April 21, 2022Applicant: Bell Textron Inc.Inventors: Grant Beall, Stephen Yibum Chung
-
Publication number: 20210276707Abstract: One embodiment is an electric drive system including a plurality of redundant motors, wherein power generated by the plurality of motors is used to drive a rotor system comprising a rotor shaft having a plurality of rotor blades connected thereto via a swashplate; a gear box associated with the plurality of redundant motors; a cyclic actuation system for controlling an individual pitch of the rotor blades connected to the swashplate; and at least one structural element for retaining the redundant motors, the gear box, and the cyclic actuation system together as a single integrated unit.Type: ApplicationFiled: March 4, 2020Publication date: September 9, 2021Inventors: William Kyle Heironimus, Stephen Yibum Chung
-
Publication number: 20210276702Abstract: One embodiment is an electric drive system for an aircraft including a motor, a gear box associated with the motor, and a cooling fan for drawing air into the unit across an electronic component to cool the electronic component and for expelling air into an oil cooler for cooling oil contained therein. The electric drive system further includes an oil distribution system for distributing oil cooled by the oil cooler to at least one motor and at least one gearbox, the distributed oil being used to cool the motor and the gearbox, a reservoir for collecting the distributed oil after it has been used to cool the motor and the gearbox, and at least one structural element for retaining the motor, gearbox, the cooling fan, the oil distribution system, and the reservoir together as a unit.Type: ApplicationFiled: March 4, 2020Publication date: September 9, 2021Inventors: William Kyle Heironimus, Stephen Yibum Chung
-
Publication number: 20210276706Abstract: One embodiment is an electric drive system for an aircraft comprising a plurality of redundant motors, wherein power generated by the plurality of motors is used to drive a rotor system comprising a rotor shaft having a plurality of rotor blades connected thereto; a gear box associated with the plurality of redundant motors; a collective actuator for controlling a collective pitch of the rotor blades connected to the rotor shaft; and at least one structural element for retaining the redundant motors, the gear box, and the collective actuator together as a single integrated unit.Type: ApplicationFiled: March 4, 2020Publication date: September 9, 2021Inventors: William Kyle Heironimus, Stephen Yibum Chung
-
Publication number: 20210114723Abstract: A modular tandem tiltrotor aircraft in which the tiltrotor assemblies are operably coupled at the forward and aft ends of the fuselage of the aircraft is disclosed. The modular tandem tiltrotor assemblies are capable of rotating between a vertical lift position and a horizontal flight position. The modular tandem tiltrotor aircraft can be structurally more efficient and lower drag than a conventional tiltrotor, has better control authority and lifting capacity than hybrid-quads and tail-sitters, and has more range than a helicopter or multi-rotor. The modular tandem tiltrotor aircraft can orbit and search over a broad area, or can hover for long periods, depending on the application. Instead of providing a multi-function tandem tiltrotor aircraft that is generally suited for all applications, but not optimized for any, the modular tandem tiltrotor aircraft allows for customized configuration to optimize the aircraft for a particular application.Type: ApplicationFiled: October 27, 2020Publication date: April 22, 2021Applicant: Bell Textron Inc.Inventors: John Robert Wittmaak, JR., Steven M. Loveland, Joshua Allan Edler, Alan Hisashi Steinert, Stephen Yibum Chung, Matthew Edward Louis
-
Patent number: 10967968Abstract: A method for an aircraft may include determining a transition from an airplane mode to a helicopter mode for a propulsion system of the aircraft, wherein the propulsion system comprises a plurality of rotor blades; determining whether a descent rate condition is satisfied, wherein the descent rate condition is associated with a maximum allowable descent rate for the aircraft; and controlling a collective pitch angle for the plurality of rotor blades based on the descent rate condition.Type: GrantFiled: November 13, 2018Date of Patent: April 6, 2021Assignee: TEXTRON INNOVATIONS INC.Inventors: Stephen Yibum Chung, Eric Ricardo Gonzalez, Russell C. Peters, Matthew Edward Louis
-
Publication number: 20200272141Abstract: In one embodiment, a remote controller for a vehicle includes at least one control element for controlling operation of at least one aspect of the vehicle when the vehicle is in a remote-control mode; an actuator connected the at least one control element for controlling a position of the at least one control element when the vehicle is in an autonomous operations mode; and a processing system for receiving a first control signal from the vehicle indicative of a state of operation of the vehicle. In operation, the processing system generates a second control signal to the actuator to cause the actuator to control a position of the control element such that it corresponds to and indicates the state of operation of the vehicle.Type: ApplicationFiled: February 25, 2019Publication date: August 27, 2020Inventors: Stephen Yibum Chung, Russell C. Peters, Andrew Vincent Louis
-
Publication number: 20200223537Abstract: A tandem tiltrotor aircraft in which the tiltrotor assemblies are operably coupled at the forward and aft ends of the fuselage of the aircraft is disclosed. The tiltrotor assemblies are capable of rotating between a vertical lift position and a horizontal flight position. The in-line location of the tiltrotor assemblies allow the aircraft to have the vertical take-off and landing capabilities, and, in combination with the at least one wing, can be used in horizontal flight. The nacelles can be disposed on the fuselage they are coaxial in forward flight and do not add to the drag profile like wing-tip nacelles would. When wing-borne flight is desired some or all of the rotors can rotate down so the thrust vector is in a generally horizontal plane.Type: ApplicationFiled: January 16, 2019Publication date: July 16, 2020Applicant: Bell Textron Inc.Inventors: John Robert Wittmaak, Stephen Yibum Chung, Matthew Edward Louis, Steven M. Loveland
-
Patent number: 10654560Abstract: One embodiment is a method including defining a maximum deflection for a first axis of a control surface axis of an aircraft; defining a maximum deflection for a second axis of the control surface; and creating a graphical representation of the maximum deflection for the first and second control surface axes. The method further includes determining an angle of rotation of a structure on which the control surface is carried, wherein the angle of rotation is relative to a body of the aircraft; rotating the graphical representation in accordance with the determined angle of rotation; calculating a distance between a point representing a selected combination of roll moment and yaw moment and each edge of the graphical representation; and calculating a control surface deflection based on the calculated distances.Type: GrantFiled: January 25, 2018Date of Patent: May 19, 2020Assignee: TEXTRON INNOVATIONS INC.Inventors: Stephen Yibum Chung, Matthew E. Louis
-
Publication number: 20200148346Abstract: A method for an aircraft is provided in one example embodiment and may include determining a transition from an airplane mode to a helicopter mode for a propulsion system of the aircraft, wherein the propulsion system comprises a plurality of rotor blades; determining whether a descent rate condition is satisfied, wherein the descent rate condition is associated with a maximum allowable descent rate for the aircraft; and controlling a collective pitch angle for the plurality of rotor blades based on the descent rate condition.Type: ApplicationFiled: November 13, 2018Publication date: May 14, 2020Applicant: Textron Innovations Inc.Inventors: Stephen Yibum Chung, Eric Ricardo Gonzalez, Russell C. Peters, Matthew Edward Louis
-
Publication number: 20190225321Abstract: One embodiment is a method including defining a maximum deflection for a first axis of a control surface axis of an aircraft; defining a maximum deflection for a second axis of the control surface; and creating a graphical representation of the maximum deflection for the first and second control surface axes. The method further includes determining an angle of rotation of a structure on which the control surface is carried, wherein the angle of rotation is relative to a body of the aircraft; rotating the graphical representation in accordance with the determined angle of rotation; calculating a distance between a point representing a selected combination of roll moment and yaw moment and each edge of the graphical representation; and calculating a control surface deflection based on the calculated distances.Type: ApplicationFiled: January 25, 2018Publication date: July 25, 2019Inventors: Stephen Yibum Chung, Matthew E. Louis