Patents by Inventor Andrew Leung
Andrew Leung 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: 11939045Abstract: A landing gear assembly for an aircraft includes an energy absorber and a land-contact assembly attached to the energy absorber. A retraction assembly is attached to the energy absorber via a pivot point. A trigger assembly is coupled to the energy absorber and the retraction assembly. The trigger assembly is configured to retract the land-contact assembly from an extended position to retracted position in response to a piston of the energy absorber reaching a maximum stroke position in which the trigger assembly triggers an actuator to actuate from a locked position to an unlocked position to release the retraction assembly in a controlled manner which rotates the energy absorber and the land-contact assembly to the retracted position. The maximum stroke position of the piston is beyond normal-operation stroke positions of the piston. A landing gear system and a method of activating the landing gear system utilizes the trigger assembly.Type: GrantFiled: April 27, 2022Date of Patent: March 26, 2024Assignee: The Boeing CompanyInventors: Adam Ian Nadel, Andrew Leung, Alex Schonfeld, Anthony R. Amadio
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Patent number: 11818808Abstract: One exemplary aspect generally relates to public safety communication systems employing Distributed Antenna Systems (DAS) and/or a Digital Distribution System (DDS) as part of a distributed wireless network. More specifically, one aspect relates to a DAS/DDS architecture utilizing a software (re)configurable network. Even more specifically, one aspect relates to a DAS/DDS architecture having a redundant system topology as well as failover capabilities at one or more of the hardware/software level and/or the communication link level.Type: GrantFiled: January 29, 2021Date of Patent: November 14, 2023Assignee: Dali Systems Co. Ltd.Inventors: Sasa Trajkovic, Andrew Leung
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Publication number: 20230348047Abstract: A landing gear assembly for an aircraft includes an energy absorber and a land-contact assembly attached to the energy absorber. A retraction assembly is attached to the energy absorber via a pivot point. A trigger assembly is coupled to the energy absorber and the retraction assembly. The trigger assembly is configured to retract the land-contact assembly from an extended position to retracted position in response to a piston of the energy absorber reaching a maximum stroke position in which the trigger assembly triggers an actuator to actuate from a locked position to an unlocked position to release the retraction assembly in a controlled manner which rotates the energy absorber and the land-contact assembly to the retracted position. The maximum stroke position of the piston is beyond normal-operation stroke positions of the piston. A landing gear system and a method of activating the landing gear system utilizes the trigger assembly.Type: ApplicationFiled: April 27, 2022Publication date: November 2, 2023Applicant: The Boeing CompanyInventors: Adam Ian Nadel, Andrew Leung, Alex Schonfeld, Anthony R. Amadio
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Publication number: 20220248498Abstract: One exemplary aspect generally relates to public safety communication systems employing Distributed Antenna Systems (DAS) and/or a Digital Distribution System (DDS) as part of a distributed wireless network. More specifically, one aspect relates to a DAS/DDS architecture utilizing a software (re)configurable network. Even more specifically, one aspect relates to a DAS/DDS architecture having a redundant system topology as well as failover capabilities at one or more of the hardware/software level and/or the communication link level.Type: ApplicationFiled: January 29, 2021Publication date: August 4, 2022Inventors: Sasa TRAJKOVIC, Andrew LEUNG
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Patent number: 11381312Abstract: A redundancy system for data transport in a Distributed Antenna System (DAS) includes a plurality of Digital Access Units (DAUs). Each of the plurality of DAUs is fed by a plurality of data streams and is operable to transport digital signals between others of the plurality of DAUs. The redundancy system also includes a plurality of Digital Distribution Units (DDUs). Each of the plurality of DDUs is in communication with each of the plurality of DAUs using cross connection communication paths. The redundancy system further includes a plurality of Digital Remote Units (DRUs). Each of the plurality of DRUs is in communication with each of the plurality of DDUs using cross connection communications paths.Type: GrantFiled: May 24, 2021Date of Patent: July 5, 2022Assignee: Dali Systems Co. Ltd.Inventors: Sasa Trajkovic, Andrew Leung
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Patent number: 11332235Abstract: Active fluid control systems and related methods are disclosed. A disclosed example active fluid control system includes a plurality of plenums coupled together to define a fluid flow passageway, and a plurality of fluidic actuators coupled to outer surfaces of respective ones of the plenums. The fluidic actuators define actuator inlets and actuator outlets. The fluid flow passageway defined by the plenums to fluidly couple the fluidic actuators and a pressurized fluid supply source. The plenums are configured to couple to an aircraft structure supporting an aerodynamic surface to enable the actuator outlets to be mounted to the aerodynamic surface. The fluidic actuators are configured to provide the pressurized fluid to the aerodynamic surface to modify an aerodynamic characteristic of the aerodynamic surface.Type: GrantFiled: July 16, 2018Date of Patent: May 17, 2022Assignee: The Boeing CompanyInventors: Andrew Leung, Michael J. Duffy, Mary E. Beckman, John Jeffrey Mattero, Rene Woszidlo
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Patent number: 11260977Abstract: Filtration apparatus are disclosed. An example filtration apparatus includes a housing including a plurality of walls defining a cavity, a filter located in the cavity, and a cleanout system coupled to the housing. The cleanout system includes a cleanout passageway between an outer surface of the housing and the filter. The cleanout system includes a cleanout inlet accessible from the outer surface of the housing and a cleanout outlet in fluid communication with the filter. The cleanout system enables removal of particulate from the filter without removing the filter from the housing.Type: GrantFiled: December 4, 2018Date of Patent: March 1, 2022Assignee: The Boeing CompanyInventors: Mary E. Beckman, Andrew Leung
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Patent number: 11207840Abstract: A system for additive manufacturing a three-dimensional object includes pre-fabricated supports arrangeable to support the three-dimensional object during additive manufacturing; and a computer configured to at least: access a computer geometric model of the three-dimensional object, and geometric parameters of the pre-fabricated supports; and generate an arrangement of the pre-fabricated supports with respective coordinates in a coordinate system, to support the three-dimensional object in the coordinate system during additive manufacturing, the computer being configured to generate the arrangement based on the computer geometric model of the three-dimensional object and the geometric parameters of the pre-fabricated supports, the computer being configured to generate different arrangements of the pre-fabricated supports for different three-dimensional objects having different computer geometric models.Type: GrantFiled: November 26, 2018Date of Patent: December 28, 2021Assignee: The Boeing CompanyInventors: Andrew Leung, Howard Thomas Rolleston
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Publication number: 20210362840Abstract: Example active flow control systems and methods for aircraft are described herein. An example an active flow control system includes a plenum, a plurality of nozzles fluidly coupled to the plenum, configured to eject high pressure air across a control surface, a compressor to supply pressurized air to the plenum, an electric motor to drive the compressor, and a control system to determine an amount of power input to the electric motor, determine a current speed of the electric motor, and determine a fault has occurred in the active flow control system based on the current speed of the electric motor.Type: ApplicationFiled: May 21, 2020Publication date: November 25, 2021Inventors: Bradley J. Rafferty, Mary E. Beckman, Andrew Leung, Douglas C. Cameron
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Publication number: 20210351846Abstract: A redundancy system for data transport in a Distributed Antenna System (DAS) includes a plurality of Digital Access Units (DAUs). Each of the plurality of DAUs is fed by a plurality of data streams and is operable to transport digital signals between others of the plurality of DAUs. The redundancy system also includes a plurality of Digital Distribution Units (DDUs). Each of the plurality of DDUs is in communication with each of the plurality of DAUs using cross connection communication paths. The redundancy system further includes a plurality of Digital Remote Units (DRUs). Each of the plurality of DRUs is in communication with each of the plurality of DDUs using cross connection communications paths.Type: ApplicationFiled: May 24, 2021Publication date: November 11, 2021Inventors: Sasa TRAJKOVIC, Andrew LEUNG
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Patent number: 11040777Abstract: Cleanout systems are disclosed. An example environmental control system includes an exhaust plenum to exhaust cooling fluid from a heat exchanger outlet of a heat exchanger, and a cleanout system coupled to the exhaust plenum adjacent the heat exchanger outlet. The cleanout system includes a cleanout passageway to fluidly couple a cleanout inlet accessible from an outer surface of the exhaust plenum and a cleanout outlet in fluid communication with the heat exchanger outlet. The cleanout system is to enable removal of particulate from the heat exchanger without disassembling the heat exchanger from the exhaust plenum or an air intake.Type: GrantFiled: December 4, 2018Date of Patent: June 22, 2021Assignee: THE BOEING COMPANYInventors: Mary E. Beckman, Andrew Leung
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Patent number: 11018769Abstract: A redundancy system for data transport in a Distributed Antenna System (DAS) includes a plurality of Digital Access Units (DAUs). Each of the plurality of DAUs is fed by a plurality of data streams and is operable to transport digital signals between others of the plurality of DAUs. The redundancy system also includes a plurality of Digital Distribution Units (DDUs). Each of the plurality of DDUs is in communication with each of the plurality of DAUs using cross connection communication paths. The redundancy system further includes a plurality of Digital Remote Units (DRUs). Each of the plurality of DRUs is in communication with each of the plurality of DDUs using cross connection communications paths.Type: GrantFiled: April 29, 2020Date of Patent: May 25, 2021Assignee: DALI SYSTEMS CO. LTD.Inventors: Sasa Trajkovic, Andrew Leung
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Publication number: 20200295833Abstract: A redundancy system for data transport in a Distributed Antenna System (DAS) includes a plurality of Digital Access Units (DAUs). Each of the plurality of DAUs is fed by a plurality of data streams and is operable to transport digital signals between others of the plurality of DAUs. The redundancy system also includes a plurality of Digital Distribution Units (DDUs). Each of the plurality of DDUs is in communication with each of the plurality of DAUs using cross connection communication paths. The redundancy system further includes a plurality of Digital Remote Units (DRUs). Each of the plurality of DRUs is in communication with each of the plurality of DDUs using cross connection communications paths.Type: ApplicationFiled: April 29, 2020Publication date: September 17, 2020Inventors: Sasa TRAJKOVIC, Andrew LEUNG
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Publication number: 20200172252Abstract: Cleanout systems are disclosed. An example environmental control system includes an exhaust plenum to exhaust cooling fluid from a heat exchanger outlet of a heat exchanger, and a cleanout system coupled to the exhaust plenum adjacent the heat exchanger outlet. The cleanout system includes a cleanout passageway to fluidly couple a cleanout inlet accessible from an outer surface of the exhaust plenum and a cleanout outlet in fluid communication with the heat exchanger outlet. The cleanout system is to enable removal of particulate from the heat exchanger without disassembling the heat exchanger from the exhaust plenum or an air intake.Type: ApplicationFiled: December 4, 2018Publication date: June 4, 2020Inventors: Mary E. Beckman, Andrew Leung
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Publication number: 20200172251Abstract: Filtration apparatus are disclosed. An example filtration apparatus includes a housing including a plurality of walls defining a cavity, a filter located in the cavity, and a cleanout system coupled to the housing. The cleanout system includes a cleanout passageway between an outer surface of the housing and the filter. The cleanout system includes a cleanout inlet accessible from the outer surface of the housing and a cleanout outlet in fluid communication with the filter. The cleanout system enables removal of particulate from the filter without removing the filter from the housing.Type: ApplicationFiled: December 4, 2018Publication date: June 4, 2020Inventors: Mary E. Beckman, Andrew Leung
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Publication number: 20200164590Abstract: A system for additive manufacturing a three-dimensional object includes pre-fabricated supports arrangeable to support the three-dimensional object during additive manufacturing; and a computer configured to at least: access a computer geometric model of the three-dimensional object, and geometric parameters of the pre-fabricated supports; and generate an arrangement of the pre-fabricated supports with respective coordinates in a coordinate system, to support the three-dimensional object in the coordinate system during additive manufacturing, the computer being configured to generate the arrangement based on the computer geometric model of the three-dimensional object and the geometric parameters of the pre-fabricated supports, the computer being configured to generate different arrangements of the pre-fabricated supports for different three-dimensional objects having different computer geometric models.Type: ApplicationFiled: November 26, 2018Publication date: May 28, 2020Inventors: Andrew Leung, Howard Thomas Rolleston
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Patent number: 10644798Abstract: A redundancy system for data transport in a Distributed Antenna System (DAS) includes a plurality of Digital Access Units (DAUs). Each of the plurality of DAUs is fed by a plurality of data streams and is operable to transport digital signals between others of the plurality of DAUs. The redundancy system also includes a plurality of Digital Distribution Units (DDUs). Each of the plurality of DDUs is in communication with each of the plurality of DAUs using cross connection communication paths. The redundancy system further includes a plurality of Digital Remote Units (DRUs). Each of the plurality of DRUs is in communication with each of the plurality of DDUs using cross connection communications paths.Type: GrantFiled: May 12, 2017Date of Patent: May 5, 2020Assignee: DALI SYSTEMS CO. LTD.Inventors: Sasa Trajkovic, Andrew Leung
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Publication number: 20200017199Abstract: Active fluid control systems and related methods are disclosed. A disclosed example active fluid control system includes a plurality of plenums coupled together to define a fluid flow passageway, and a plurality of fluidic actuators coupled to outer surfaces of respective ones of the plenums. The fluidic actuators define actuator inlets and actuator outlets. The fluid flow passageway defined by the plenums to fluidly couple the fluidic actuators and a pressurized fluid supply source. The plenums are configured to couple to an aircraft structure supporting an aerodynamic surface to enable the actuator outlets to be mounted to the aerodynamic surface. The fluidic actuators are configured to provide the pressurized fluid to the aerodynamic surface to modify an aerodynamic characteristic of the aerodynamic surface.Type: ApplicationFiled: July 16, 2018Publication date: January 16, 2020Inventors: Andrew Leung, Michael J. Duffy, Mary E. Beckman, John Jeffrey Mattero, Rene Woszidlo
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Publication number: 20170366268Abstract: A redundancy system for data transport in a Distributed Antenna System (DAS) includes a plurality of Digital Access Units (DAUs). Each of the plurality of DAUs is fed by a plurality of data streams and is operable to transport digital signals between others of the plurality of DAUs. The redundancy system also includes a plurality of Digital Distribution Units (DDUs). Each of the plurality of DDUs is in communication with each of the plurality of DAUs using cross connection communication paths. The redundancy system further includes a plurality of Digital Remote Units (DRUs). Each of the plurality of DRUs is in communication with each of the plurality of DDUs using cross connection communications paths.Type: ApplicationFiled: May 12, 2017Publication date: December 21, 2017Inventors: Sasa Trajkovic, Andrew Leung
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Patent number: 9323367Abstract: A method of modifying an annotation input on an interactive display in an interactive input system is described. Reference pixel values in a region of interest of a reference frame are determined. The region of interest is associated with the annotation. The reference pixel values are stored in memory. It is determined whether current pixel values in the region of interest of a current frame differ from the reference pixel values. The annotation is faded if the current pixel values in the region of interest differ from the reference pixel values. A computing device configured to implement the method and a computer-readable medium having stored thereon instruction to implement the method are also described.Type: GrantFiled: June 21, 2013Date of Patent: April 26, 2016Assignee: SMART TECHNOLOGIES ULCInventors: Min Xin, Andrew Leung, Michael Boyle, Edward Tse