Patents by Inventor Wai To Li
Wai To Li 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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Publication number: 20200161976Abstract: Certain aspects of the present disclosure generally relate to an adaptive combination power supply circuit. The adaptive combination power supply circuit may be capable of switching between performing as a three-level buck converter and as a divide-by-two charge pump. One example power supply circuit generally includes a first transistor; a second transistor coupled to the first transistor via a first node; a third transistor coupled to the second transistor via a second node; a fourth transistor coupled to the third transistor via a third node; a capacitive element having a first terminal coupled to the first node and a second terminal coupled to the third node; an inductive element having a first terminal coupled to the second node; and a switch having a first terminal coupled to the first terminal of the inductive element, the switch having a second terminal coupled to a second terminal of the inductive element.Type: ApplicationFiled: November 14, 2019Publication date: May 21, 2020Inventors: Chunping SONG, Jiwei CHEN, David King Wai LI
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Patent number: 10322436Abstract: A method of applying a riblet structure coating on the internal surface of a pipe includes coating the internal surface of a pipe with a resin layer and applying a cavity mold having a reverse riblet pattern structure to the coated internal surface of the pipe. A flexible air bag is inserted into the interior of the pipe and charged with air to hold the mold against the coated internal surface of the pipe. The air bag may be charged with air for a sufficient amount of time to allow the coating to cure in the riblet shape of the mold. Afterwards, the air bag and the mold are removed from the pipe to yield a pipe coated with an internal riblet structure.Type: GrantFiled: October 6, 2017Date of Patent: June 18, 2019Assignee: NANO AND ADVANCED MATERIALS INSTITUTE LIMITEDInventors: Su Ping Bao, Lei Gao, Man Lung Sham, Chun Ping Wu, Chi Wai Li
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Patent number: 10231714Abstract: An actuator for a medical device includes a housing, a driving unit mounted in the housing, a first moving unit slidably mounted in the housing and movable by the driving unit. The first moving unit includes a movable first car, an spring with two ends thereof abutting the housing and first car, respectively, and a lock formed between the driving unit and first car. The lock includes a first snap and a first protrusion detachably engagable with the first snap. One of the first snap and first protrusion is formed on the first car, and the other is formed on the driving unit. When the first protrusion disengages from the first snap, the spring moves the first car relative to the housing.Type: GrantFiled: September 25, 2015Date of Patent: March 19, 2019Assignee: JOHNSON ELECTRIC INTERNATIONAL AGInventors: Jian Dong Gao, Wai To Li
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Publication number: 20190074658Abstract: A transistor outline (TO) housing comprising a base part having a mounting area for a thermoelectric cooler, wherein the base part has at least two feedthroughs for connecting an optoelectronic component. A support extends from the upper surface of the base part, which support has at least two conductor traces arranged thereon, each of which is connected to a respective one of the feedthroughs for connecting the optoelectronic component.Type: ApplicationFiled: August 31, 2018Publication date: March 7, 2019Applicant: SCHOTT AGInventors: Rudolf Jungwirth, Amy Soon Li Ping, Artit Aowudomsuk, Ong Wai Li, Kenneth Tan, Karsten Droegemueller
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Patent number: 10099005Abstract: A drive mechanism for a medication delivery device includes a motor, a housing, a gear cover, a gear transmission system, a helical transmission system, and a sensor system. The helical transmission system includes a plug, a screw shaft, and a sliding block connecting the plug to the screw shaft. The gear transmission system includes a first gear disposed on an output shaft of the motor and a second gear disposed on one end of the screw shaft. Dual gears interconnect the first and second gears. The motor drives the plug along a linear path by rotating the screw shaft via the gear transmission system, causing the sliding block to move along the screw shaft. The sensor system monitors the driving process. The plug provides the force required to effect the dosing of the medication.Type: GrantFiled: October 23, 2015Date of Patent: October 16, 2018Assignee: JOHNSON ELECTRIC S.A.Inventors: Jian Dong Gao, Wai To Li
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Publication number: 20180156235Abstract: A turbofan engine is disclosed having a bypass duct with an asymmetry in aerodynamic profile caused by a local obstruction in the bypass duct. The engine comprises stator vanes circumferentially spaced-apart around a circumference of the bypass duct. A first group of adjacent stator vanes includes a majority of the plurality of stator vanes and are arranged in a first circumferential sector of the bypass duct and have equal stagger angles. A second group of adjacent stator vanes includes a minority of the plurality of stator vanes and are arranged in a second circumferential sector circumferentially positioned relative to the local obstruction. The stator vanes of the second group have stagger angles different from the stagger angles of the stator vanes of the first group.Type: ApplicationFiled: December 6, 2016Publication date: June 7, 2018Inventors: Yau-Wai LI, Peter TOWNSEND, Ronald DUTTON, Bernadette MASON
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Publication number: 20180138812Abstract: A predictive controller for an inductive DC-DC converter comprising a switchable inductor is described. The predictive controller includes a DC-DC controller configured to generate a plurality of switching phases to control the inductor current in the switchable inductor, the duration of the switching phases being determined from at least one of a reference inductor current value and a reference output voltage value. The predictive controller includes a supervisory controller coupled to the DC-DC controller and configured to set a reference inductor current value dependent on an expected change in load current and/or voltage of a load configured to be connected to the load terminal. The expected change in load current and/or voltage is determined from a predetermined load profile.Type: ApplicationFiled: October 4, 2017Publication date: May 17, 2018Inventors: Matthias ROSE, Hendrik Johannes BERGVELD, Olivier TRESCASES, David King Wai LI
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Patent number: 9973083Abstract: A predictive controller for an inductive DC-DC converter comprising a switchable inductor is described. The predictive controller includes a DC-DC controller configured to generate a plurality of switching phases to control the inductor current in the switchable inductor, the duration of the switching phases being determined from at least one of a reference inductor current value and a reference output voltage value. The predictive controller includes a supervisory controller coupled to the DC-DC controller and configured to set a reference inductor current value dependent on an expected change in load current and/or voltage of a load configured to be connected to the load terminal. The expected change in load current and/or voltage is determined from a predetermined load profile.Type: GrantFiled: October 4, 2017Date of Patent: May 15, 2018Assignee: NXP B.V.Inventors: Matthias Rose, Hendrik Johannes Bergveld, Olivier Trescases, David King Wai Li
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Publication number: 20180099312Abstract: A method of applying a riblet structure coating on the internal surface of a pipe includes coating the internal surface of a pipe with a resin layer and applying a cavity mold having a reverse riblet pattern structure to the coated internal surface of the pipe. A flexible air bag is inserted into the interior of the pipe and charged with air to hold the mold against the coated internal surface of the pipe. The air bag may be charged with air for a sufficient amount of time to allow the coating to cure in the riblet shape of the mold. Afterwards, the air bag and the mold are removed from the pipe to yield a pipe coated with an internal riblet structure.Type: ApplicationFiled: October 6, 2017Publication date: April 12, 2018Inventors: Su Ping BAO, Lei GAO, Man Lung SHAM, Chun Ping WU, Chi Wai LI
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Patent number: 9879540Abstract: Compressor stators (22) for gas turbine engines (10) are disclosed. An exemplary compressor stator (22) comprises a circumferential array of stator vanes (28) and a shroud (24, 26) for supporting the stator vanes (28). The shroud (24, 26) has a circumferentially extending inner endwall (30, 32) exposed to an annular gas path (20) of the compressor (14). The endwall (30, 32) has a circumferentially uniform axial cross-sectional profile (42). The axial cross-sectional profile (42) comprises at least one deviation (48, 50) from a nominal axial cross-sectional profile (44) defining an overall shape of the annular gas path (20). The at least one deviation comprises a concave deviation (48) and a convex deviation (50).Type: GrantFiled: March 12, 2013Date of Patent: January 30, 2018Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Yau-Wai Li, Karan Anand, Peter Townsend
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Publication number: 20170337448Abstract: A parking bay monitoring system for electric vehicles includes a main unit for each parking bay, a router being housed in the main unit and connects to a network, at least one digital camera mounted in a position to take digital images of a parking bay, wherein the digital images are transmitted via the router to a central server for analysis by a visual recognition framework to generate a detection result. The system further includes a charging unit, wherein real time data relating to charging is logged and transmitted to the central server, wherein an occupancy status for each parking bay is generated based on the detection result and said data. The system generates a list containing the occupancy status of each parking bay and the said list being accessible by at least one terminal connected to the network.Type: ApplicationFiled: March 6, 2017Publication date: November 23, 2017Inventors: Chiu Shing Ng, Wai Chung Lee, Tai Wai Li, Yuen Yee Chung, Shuk Ching Chan
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Patent number: 9813384Abstract: A method and apparatus for transmitting secure data packets through a node network. Unsecure data packets are received at a set of unsecure inputs and secure data packets are received at a number of secure inputs in a node in the node network. The secure data packets are authorized to be sent to a number of secure destination devices. The unsecure data packets are not authorized to be sent to the number of secure destination devices. The secure data packets and the unsecure data packets are integrated to form a number of output data streams based on a predetermined schedule. The number of output data streams is sent to a number of next nodes in the node network.Type: GrantFiled: October 31, 2012Date of Patent: November 7, 2017Assignee: THE BOEING COMPANYInventors: Wayne R. Howe, Jeffrey H. Hunt, Angela Wai-an Li
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Publication number: 20170244825Abstract: The present subject matter discloses a portable electronic device having multiple functional units for providing distinct functionalities to the portable electronic device. The portable electronic device also has a connection port unit having a plurality of connection ports and coupled to the plurality of functional units. A main controller unit connected to the functional units and the connection port unit. The main controller unit is configured to receive status signals from the functional units based on which it compiles a device status signal. A wireless communication unit is coupled to the main controller unit for facilitating wireless communication with a separate electronic device.Type: ApplicationFiled: February 15, 2017Publication date: August 24, 2017Inventor: CHI WAI LI
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Patent number: 9563211Abstract: A power converter for a load with varying power requirements dynamically adjusts its supply voltage to the load so as to track the radio frequency (RF) envelope of the signal being carried by the load. The supply voltage can be provided by a multiple-output charge pump providing multiple output voltage levels concurrently, and a switch to provide a selected one of the different output voltage levels as the supply voltage to the load. A controller controls the switch to dynamically modify the voltage level selected for output as the supply voltage such that the supply voltage tracks the RF envelope of the signal being carried by the load. As the switching losses of transistors of the power converter may exceed the power savings achieved through envelope tracking, the power converter employs a peak following frequency divider circuit that limits the switching frequency of the power converter to a threshold frequency.Type: GrantFiled: April 18, 2013Date of Patent: February 7, 2017Assignee: ATI Technologies ULCInventor: David King Wai Li
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Publication number: 20160290137Abstract: A gas turbine engine includes rotor having a hub, and a plurality of blades extending generally radially from the hub. Each of the blades has an airfoil portion. The airfoil portion has a leading edge and a trailing edge defining a chordwise direction, and a root and a tip defining a spanwise direction. Only a sub-set of the blades has a cutback at at least one of the trailing edge and the leading edge. A method of designing and a method of assembling a rotor having noise reduction properties in a gas turbine engine is also presented.Type: ApplicationFiled: March 30, 2015Publication date: October 6, 2016Inventors: Yau-Wai LI, Peter TOWNSEND, Vijay KANDASAMY
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Publication number: 20160114098Abstract: A drive mechanism for a medication delivery device includes a motor, a housing, a gear cover, a gear transmission system, a helical transmission system, and a sensor system. The helical transmission system includes a plug, a screw shaft, and a sliding block connecting the plug to the screw shaft. The gear transmission system includes a first gear disposed on an output shaft of the motor and a second gear disposed on one end of the screw shaft. Dual gears interconnect the first and second gears. The motor drives the plug along a linear path by rotating the screw shaft via the gear transmission system, causing the sliding block to move along the screw shaft. The sensor system monitors the driving process. The plug provides the force required to effect the dosing of the medication.Type: ApplicationFiled: October 23, 2015Publication date: April 28, 2016Inventors: Jian Dong GAO, Wai To LI
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Publication number: 20160089120Abstract: An actuator for a medical device includes a housing, a driving unit mounted in the housing, a first moving unit slidably mounted in the housing and movable by the driving unit. The first moving unit includes a movable first car, an spring with two ends thereof abutting the housing and first car, respectively, and a lock formed between the driving unit and first car. The lock includes a first snap and a first protrusion detachably engagable with the first snap. One of the first snap and first protrusion is formed on the first car, and the other is formed on the driving unit. When the first protrusion disengages from the first snap, the spring moves the first car relative to the housing.Type: ApplicationFiled: September 25, 2015Publication date: March 31, 2016Inventors: Jian Dong GAO, Wai To LI
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Patent number: 9086522Abstract: A method and apparatus for a device configured to communicate using an optical signal and an electrical signal through a connection to a tube comprised of a number of layers of carbon forming a wall of the tube. The number of layers of carbon has a number of optical properties configured to propagate the optical signal and a number of electrical properties configured to conduct the electrical signal.Type: GrantFiled: May 29, 2012Date of Patent: July 21, 2015Assignee: THE BOEING COMPANYInventors: Angela Wai-an Li, Jeffrey H. Hunt, Wayne R. Howe
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Patent number: 9086523Abstract: A method and apparatus for transmitting signals. An apparatus comprises a tube comprising a number of layers of carbon forming a wall of the tube. The number of layers of carbon has a number of optical properties configured to propagate an optical signal and a number of electrical properties configured to conduct an electrical signal.Type: GrantFiled: May 29, 2012Date of Patent: July 21, 2015Assignee: THE BOEING COMPANYInventors: Wayne R. Howe, Jeffrey H. Hunt, Angela Wai-an Li
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Publication number: 20140312710Abstract: A power converter for a load with varying power requirements dynamically adjusts its supply voltage to the load so as to track the radio frequency (RF) envelope of the signal being carried by the load. The supply voltage can be provided by a multiple-output charge pump providing multiple output voltage levels concurrently, and a switch to provide a selected one of the different output voltage levels as the supply voltage to the load. A controller controls the switch to dynamically modify the voltage level selected for output as the supply voltage such that the supply voltage tracks the RF envelope of the signal being carried by the load. As the switching losses of transistors of the power converter may exceed the power savings achieved through envelope tracking, the power converter employs a peak following frequency divider circuit that limits the switching frequency of the power converter to a threshold frequency.Type: ApplicationFiled: April 18, 2013Publication date: October 23, 2014Applicant: ATI Technologies ULCInventor: David King Wai Li