Patents by Inventor Kai Chi Chan
Kai Chi Chan 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: 9971934Abstract: A method for partially occluded object detection includes obtaining a response map for a detection window of an input image, the response map based on a trained model and including a root layer and a parts layer. The method includes determining visibility flags for each root cell of the root layer and each part of the parts layer. The visibility flag is one of visible or occluded. The method includes determining an occlusion penalty for each root cell with a visibility flag of occluded and for each part with a visibility flag of occluded. The occlusion penalty is based on a location of the root cell or the part with respect to the detection window. The method determines a detection score for the detection window based on the visibility flags and the occlusion penalties and generates an estimated visibility map for object detection based on the detection score.Type: GrantFiled: August 30, 2017Date of Patent: May 15, 2018Assignee: Honda Motor Co., Ltd.Inventors: Alper Ayvaci, Kai-Chi Chan, Bernd Heisele
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Publication number: 20180005025Abstract: A method for partially occluded object detection includes obtaining a response map for a detection window of an input image, the response map based on a trained model and including a root layer and a parts layer. The method includes determining visibility flags for each root cell of the root layer and each part of the parts layer. The visibility flag is one of visible or occluded. The method includes determining an occlusion penalty for each root cell with a visibility flag of occluded and for each part with a visibility flag of occluded. The occlusion penalty is based on a location of the root cell or the part with respect to the detection window. The method determines a detection score for the detection window based on the visibility flags and the occlusion penalties and generates an estimated visibility map for object detection based on the detection score.Type: ApplicationFiled: August 30, 2017Publication date: January 4, 2018Inventors: Alper Ayvaci, Kai-Chi Chan, Bernd Heisele
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Patent number: 9785828Abstract: A method for partially occluded object detection includes obtaining a response map for a detection window of an input image, the response map based on a trained model and including a root layer and a parts layer. The method includes determining visibility flags for each root cell of the root layer and each part of the parts layer. The visibility flag is one of visible or occluded. The method includes determining an occlusion penalty for each root cell with a visibility flag of occluded and for each part with a visibility flag of occluded. The occlusion penalty is based on a location of the root cell or the part with respect to the detection window. The method determines a detection score for the detection window based on the visibility flags and the occlusion penalties and generates an estimated visibility map for object detection based on the detection score.Type: GrantFiled: March 9, 2015Date of Patent: October 10, 2017Assignee: Honda Motor Co., Ltd.Inventors: Alper Ayvaci, Kai-Chi Chan, Bernd Heisele
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Patent number: 9663933Abstract: A toilet apparatus includes a toilet bowl with a seat, a reservoir for containing water for flushing the toilet bowl, and a water jet device including a conduit with an inlet, an outlet, and a nozzle at the outlet and located in the toilet bowl for generating a water jet to clean a user. A thermoelectric heat pump having a cold side in thermal communication with water in the reservoir extracts heat from the water in the reservoir and a hot side in thermal communication with a conduit section of the conduit supplies heat extracted from water in the reservoir and increases the temperature of water flowing through the conduit.Type: GrantFiled: May 15, 2015Date of Patent: May 30, 2017Assignee: DEFOND HOLDINGS (H. K.) CO. LIMITEDInventors: Kai Chi Chan, Kwok Chiu Yu, Yu Chi Lok
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Publication number: 20160333561Abstract: A toilet apparatus includes a toilet bowl with a seat, a reservoir for containing water for flushing the toilet bowl, and a water jet device including a conduit with an inlet, an outlet, and a nozzle at the outlet and located in the toilet bowl for generating a water jet to clean a user. A thermoelectric heat pump having a cold side in thermal communication with water in the reservoir extracts heat from the water in the reservoir and a hot side in thermal communication with a conduit section of the conduit supplies heat extracted from water in the reservoir and increases the temperature of water flowing through the conduit.Type: ApplicationFiled: May 15, 2015Publication date: November 17, 2016Inventors: Kai Chi Chan, Kwok Chiu Yu, Yu Chi Lok
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Publication number: 20160180192Abstract: A method for partially occluded object detection includes obtaining a response map for a detection window of an input image, the response map based on a trained model and including a root layer and a parts layer. The method includes determining visibility flags for each root cell of the root layer and each part of the parts layer. The visibility flag is one of visible or occluded. The method includes determining an occlusion penalty for each root cell with a visibility flag of occluded and for each part with a visibility flag of occluded. The occlusion penalty is based on a location of the root cell or the part with respect to the detection window. The method determines a detection score for the detection window based on the visibility flags and the occlusion penalties and generates an estimated visibility map for object detection based on the detection score.Type: ApplicationFiled: March 9, 2015Publication date: June 23, 2016Inventors: Alper Ayvaci, Kai-Chi Chan, Bernd Heisele
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Patent number: 9231906Abstract: A method of assigning identification codes to devices, each device including a controller, a memory, and a switch, with the devices connected in a series circuit. The method includes opening all of the switches, supplying a signal, including an identification code, to the first device of the series circuit and storing the identification code in the memory of the first device, closing the switch of the first device to connect to the next device in the series circuit, sending an acknowledgement to the series circuit, and repeating the process for each of the devices, successively, for each of the devices in the series circuit, and assigning a different identification code to each of the devices.Type: GrantFiled: October 7, 2011Date of Patent: January 5, 2016Assignee: DEFOND COMPONENTS LIMITEDInventors: Man Yin Arthur Newton Chu, Kai Chi Chan
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Patent number: 9228334Abstract: A fluid-operated actuator assembly has a valve with an inlet for connection to a pressurized fluid source, a bi-stable electromagnetic device for operating the valve, which has a first state closing the valve and a second state opening the valve, a hydraulic actuator, and an electronic control circuit. The hydraulic actuator has an actuating member in a housing, the housing having a chamber on one side of the actuating member to which an outlet of the valve is connected for receiving fluid from the fluid source when the valve is opened, the actuating member for operation of the hydraulic actuator. The control circuit momentarily energizes the bi-stable electromagnetic device to the hydraulic actuator from the second state, back to the first state, to terminate operation of the hydraulic actuator.Type: GrantFiled: April 30, 2012Date of Patent: January 5, 2016Assignee: DEFOND COMPONENTS LIMITEDInventors: Kwok Chiu Yu, Kai Chi Chan, Alec Kam Lek Quan
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Publication number: 20130152293Abstract: A fluid-operated actuator assembly has a valve with an inlet for connection to a pressurized fluid source, a bi-stable electromagnetic device for operating the valve, which has a first state closing the valve and a second state opening the valve, a hydraulic actuator, and an electronic control circuit. The hydraulic actuator has an actuating member in a housing, the housing having a chamber on one side of the actuating member to which an outlet of the valve is connected for receiving fluid from the fluid source when the valve is opened, the actuating member for operation of the hydraulic actuator. The control circuit momentarily energizes the bi-stable electromagnetic device to the hydraulic actuator from the second state, back to the first state, to terminate operation of the hydraulic actuator.Type: ApplicationFiled: April 30, 2012Publication date: June 20, 2013Applicant: DEFOND COMPONENTS LIMITEDInventors: Kwok Chiu YU, Kai Chi CHAN, Alec Kam Lek QUAN
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Publication number: 20130089157Abstract: A method of assigning identification codes to devices, each device including a controller, a memory, and a switch, with the devices connected in a series circuit. The method includes opening all of the switches, supplying a signal, including an identification code, to the first device of the series circuit and storing the identification code in the memory of the first device, closing the switch of the first device to connect to the next device in the series circuit, sending an acknowledgement to the series circuit, and repeating the process for each of the devices, successively, for each of the devices in the series circuit, and assigning a different identification code to each of the devices.Type: ApplicationFiled: October 7, 2011Publication date: April 11, 2013Applicant: DEFOND COMPONENTS LIMITEDInventors: Man Yin Arthur Newton CHU, Kai Chi CHAN
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Patent number: 8130066Abstract: Wire-holders are provided that confine a single wire over a limited arc section and that are interspersed with ferrite ingots that provide wire-ways for several wires are utilized in the winding of the coils of a transformer. A method for consistently producing windings having accurate wire placement on rotors, stators, and other electrical componentry is also provided.Type: GrantFiled: September 22, 2010Date of Patent: March 6, 2012Assignee: Schleifring Medical Systems USAInventors: Gregory M. Dunlap, Kai Chi Chan
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Publication number: 20110057758Abstract: Wire-holders are provided that confine a single wire over a limited arc section and that are interspersed with ferrite ingots that provide wire-ways for several wires are utilized in the winding of the coils of a transformer. A method for consistently producing windings having accurate wire placement on rotors, stators, and other electrical componentry is also provided.Type: ApplicationFiled: September 22, 2010Publication date: March 10, 2011Inventors: Gregory M. Dunlap, Kai Chi Chan
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Patent number: 7808352Abstract: Wire-holders are provided that confine a single wire over a limited arc section and that are interspersed with ferrite ingots that provide wire-ways for several wires are utilized in the winding of the coils of a transformer. A method for consistently producing windings having accurate wire placement on rotors, stators, and other electrical componentry is also provided.Type: GrantFiled: March 5, 2009Date of Patent: October 5, 2010Assignee: Schleifring Medical Systems USAInventors: Gregory M. Dunlap, Kai Chi Chan
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Publication number: 20100225433Abstract: Wire-holders are provided that confine a single wire over a limited arc section and that are interspersed with ferrite ingots that provide wire-ways for several wires are utilized in the winding of the coils of a transformer. A method for consistently producing windings having accurate wire placement on rotors, stators, and other electrical componentry is also provided.Type: ApplicationFiled: March 5, 2009Publication date: September 9, 2010Applicant: SCHLEIFRING MEDICAL SYSTEMS, INC.Inventors: Gregory M. Dunlap, Kai Chi Chan
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Publication number: 20100148505Abstract: A transformer is provided comprising a first member upon which a first circuit is wound; a second member upon which a second circuit is wound such that power is transferred to the second circuit in a contact-less manner; and a signal transmitter on the first member in close proximity to an appropriate receiver on the second member together with a signal transmitter on the second member in close proximity to an appropriate receiver on the first member such that said transmitters and receivers exchange signals in a contact-less manner, whereby the circuits are embedded in a high thermal conductivity resin. An exemplary embodiment of the invented transformer is one where the second member rotates relative to the first member.Type: ApplicationFiled: December 16, 2008Publication date: June 17, 2010Inventors: Gregory M. Dunlap, Kai Chi Chan, Jason S. Katcha, Thomas A. Spengler, Jeremy A. Miller
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Patent number: 7717619Abstract: Methods and apparatus for an imaging system are provided. The imaging system includes a gantry having a stationary member coupled to a rotating member. The rotating member has an opened area proximate an axis about which the rotating member rotates. An x-ray source provided on the rotating member. An x-ray detector may be disposed on the rotating member and configured to receive x-rays from the x-ray source. A rotary transformer having circumferentially disposed primary and secondary windings may form part of a contactless power transfer system that rotates the rotatable portion of the gantry at very high speeds, the primary winding being disposed on the stationary member and the secondary winding being disposed on the rotating member.Type: GrantFiled: January 18, 2008Date of Patent: May 18, 2010Assignee: General Electric CompanyInventors: Jason Stuart Katcha, Gregory Martin Dunlap, Kai Chi Chan
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Publication number: 20090185658Abstract: Methods and apparatus for an imaging system are provided. The imaging system includes a gantry having a stationary member coupled to a rotating member. The rotating member has an opened area proximate an axis about which the rotating member rotates. An x-ray source provided on the rotating member. An x-ray detector may be disposed on the rotating member and configured to receive x-rays from the x-ray source. A rotary transformer having circumferentially disposed primary and secondary windings may form part of a contactless power transfer system that rotates the rotatable portion of the gantry at very high speeds, the primary winding being disposed on the stationary member and the secondary winding being disposed on the rotating member.Type: ApplicationFiled: January 18, 2008Publication date: July 23, 2009Inventors: Jason Stuart Katcha, Gregory Martin Dunlap, Kai Chi Chan
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Patent number: 6749028Abstract: A trigger assembly for controlling an electric power tool including a motor comprises a base for fixing within the power tool and a trigger supported by the base for inward and outward movement, the trigger being resiliently biassed outwards. The base has a housing including an opening open to the interior of the power tool. A switch provided in the housing is operable in response to the movement of the trigger to switch on and off the motor. An electronic operating circuitry provided in the housing includes a solid-state device for switching at a frequency having a variable duty cycle to control the operation of the motor when the switch is closed. Also included is a flywheel diode for the motor, which is operable when the solid-state device is non-conducting while switching. The diode is supported at or adjacent the housing opening to facilitate heat dissipation.Type: GrantFiled: May 22, 2003Date of Patent: June 15, 2004Assignee: Defond Components LimitedInventors: Kai Chi Chan, Man Ting Ho
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Patent number: 6736220Abstract: A trigger assembly for controlling an electric power tool including a motor comprises a base for fixing within the power tool and a trigger supported by the base for inward and outward movement. The base has a housing, a first mechanical switch provided in the housing and operable to switch on and off the motor, and an electronic operating circuitry provided in the housing for controlling the operation of the motor when the first switch is closed. The base includes a slider guided within the housing for movement by the trigger to operate the first switch and the operating circuitry. Also included is a second mechanical switch provided within the housing and operable in response to the movement of the trigger to switch on and off an auxiliary device for the power tool. The auxiliary device is located externally of the base and is operable independently of the operating circuitry.Type: GrantFiled: May 22, 2003Date of Patent: May 18, 2004Assignee: Defond Components LimitedInventors: Kai Chi Chan, Man Ting Ho
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Patent number: 6717080Abstract: A trigger assembly for an electric power tool including a motor comprises a base for fixing within the power tool and a trigger supported by the base for inward and outward movement. A mechanical switch in the base switches on and off the motor. An operating circuitry including a solid-state device in the base controls the motor when the switch is closed. A slider guided within the base for movement by the trigger operates the switch and the operating circuitry. The switch has a fixed contact, a moving contact pivotable into contact with and out of contact from the fixed contact, and a spring biassing the moving contact towards the closed position. The moving contact has a first end for contacting the fixed contact and a second end for engagement by the slider to cause pivoting of the moving contact to the open position. Two such switches are used as main and bypass switches, with their moving contacts supported by a common conductive support together forming a switch module to facilitate installation.Type: GrantFiled: May 22, 2003Date of Patent: April 6, 2004Assignee: Defond Components LimitedInventors: Kai Chi Chan, Man Ting Ho