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).

  • Patent number: 9971934
    Abstract: 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: Grant
    Filed: August 30, 2017
    Date of Patent: May 15, 2018
    Assignee: Honda Motor Co., Ltd.
    Inventors: Alper Ayvaci, Kai-Chi Chan, Bernd Heisele
  • Publication number: 20180005025
    Abstract: 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: Application
    Filed: August 30, 2017
    Publication date: January 4, 2018
    Inventors: Alper Ayvaci, Kai-Chi Chan, Bernd Heisele
  • Patent number: 9785828
    Abstract: 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: Grant
    Filed: March 9, 2015
    Date of Patent: October 10, 2017
    Assignee: Honda Motor Co., Ltd.
    Inventors: Alper Ayvaci, Kai-Chi Chan, Bernd Heisele
  • Patent number: 9663933
    Abstract: 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: Grant
    Filed: May 15, 2015
    Date of Patent: May 30, 2017
    Assignee: DEFOND HOLDINGS (H. K.) CO. LIMITED
    Inventors: Kai Chi Chan, Kwok Chiu Yu, Yu Chi Lok
  • Publication number: 20160333561
    Abstract: 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: Application
    Filed: May 15, 2015
    Publication date: November 17, 2016
    Inventors: Kai Chi Chan, Kwok Chiu Yu, Yu Chi Lok
  • Publication number: 20160180192
    Abstract: 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: Application
    Filed: March 9, 2015
    Publication date: June 23, 2016
    Inventors: Alper Ayvaci, Kai-Chi Chan, Bernd Heisele
  • Patent number: 9231906
    Abstract: 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: Grant
    Filed: October 7, 2011
    Date of Patent: January 5, 2016
    Assignee: DEFOND COMPONENTS LIMITED
    Inventors: Man Yin Arthur Newton Chu, Kai Chi Chan
  • Patent number: 9228334
    Abstract: 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: Grant
    Filed: April 30, 2012
    Date of Patent: January 5, 2016
    Assignee: DEFOND COMPONENTS LIMITED
    Inventors: Kwok Chiu Yu, Kai Chi Chan, Alec Kam Lek Quan
  • Publication number: 20130152293
    Abstract: 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: Application
    Filed: April 30, 2012
    Publication date: June 20, 2013
    Applicant: DEFOND COMPONENTS LIMITED
    Inventors: Kwok Chiu YU, Kai Chi CHAN, Alec Kam Lek QUAN
  • Publication number: 20130089157
    Abstract: 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: Application
    Filed: October 7, 2011
    Publication date: April 11, 2013
    Applicant: DEFOND COMPONENTS LIMITED
    Inventors: Man Yin Arthur Newton CHU, Kai Chi CHAN
  • Patent number: 8130066
    Abstract: 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: Grant
    Filed: September 22, 2010
    Date of Patent: March 6, 2012
    Assignee: Schleifring Medical Systems USA
    Inventors: Gregory M. Dunlap, Kai Chi Chan
  • Publication number: 20110057758
    Abstract: 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: Application
    Filed: September 22, 2010
    Publication date: March 10, 2011
    Inventors: Gregory M. Dunlap, Kai Chi Chan
  • Patent number: 7808352
    Abstract: 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: Grant
    Filed: March 5, 2009
    Date of Patent: October 5, 2010
    Assignee: Schleifring Medical Systems USA
    Inventors: Gregory M. Dunlap, Kai Chi Chan
  • Publication number: 20100225433
    Abstract: 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: Application
    Filed: March 5, 2009
    Publication date: September 9, 2010
    Applicant: SCHLEIFRING MEDICAL SYSTEMS, INC.
    Inventors: Gregory M. Dunlap, Kai Chi Chan
  • Publication number: 20100148505
    Abstract: 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: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Inventors: Gregory M. Dunlap, Kai Chi Chan, Jason S. Katcha, Thomas A. Spengler, Jeremy A. Miller
  • Patent number: 7717619
    Abstract: 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: Grant
    Filed: January 18, 2008
    Date of Patent: May 18, 2010
    Assignee: General Electric Company
    Inventors: Jason Stuart Katcha, Gregory Martin Dunlap, Kai Chi Chan
  • Publication number: 20090185658
    Abstract: 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: Application
    Filed: January 18, 2008
    Publication date: July 23, 2009
    Inventors: Jason Stuart Katcha, Gregory Martin Dunlap, Kai Chi Chan
  • Patent number: 6749028
    Abstract: 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: Grant
    Filed: May 22, 2003
    Date of Patent: June 15, 2004
    Assignee: Defond Components Limited
    Inventors: Kai Chi Chan, Man Ting Ho
  • Patent number: 6736220
    Abstract: 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: Grant
    Filed: May 22, 2003
    Date of Patent: May 18, 2004
    Assignee: Defond Components Limited
    Inventors: Kai Chi Chan, Man Ting Ho
  • Patent number: 6717080
    Abstract: 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: Grant
    Filed: May 22, 2003
    Date of Patent: April 6, 2004
    Assignee: Defond Components Limited
    Inventors: Kai Chi Chan, Man Ting Ho