Patents by Inventor Takao MUKO

Takao MUKO 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: 10731872
    Abstract: A water heating system includes a plurality of water heaters of which exhaust paths are connected in common to an exhaust path assembly, a control device configured for centralized control of the plurality of water heaters, and a non-volatile storage unit. The plurality of water heaters include control units configured to control hot water supply operations based on communication with the control device, respectively. The storage unit is configured to store information on the water heater of which control unit is recorded to have established communication with the control device. The control device turns off all of the plurality of water heaters when information on the water heater of which control unit has currently established communication with the control device does not match with the information stored in the storage unit.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: August 4, 2020
    Assignee: NORITZ CORPORATION
    Inventors: Shinichi Okamoto, Takao Muko
  • Patent number: 10539338
    Abstract: A combustion device includes a combustion control section which controls combustion in the combustion device; a setting section operated to set information indicating whether or not a plurality of combustion devices are in a common vent discharge state; and a memory section which stores therein connection configurations with the other combustion control sections to which the combustion control section is communicatively connected, and the combustion control section determines whether or not the combustion control section can communicate with a linkage control section or the other combustion control sections, and inhibits combustion in the combustion device to which the combustion control section belongs, in a case where the combustion control section determines that the combustion control section cannot communicate with the linkage control section or at least one of the other combustion control sections and the common vent discharge state is set by the setting section.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: January 21, 2020
    Assignee: NORITZ CORPORATION
    Inventors: Shinichi Okamoto, Takao Muko
  • Patent number: 10337763
    Abstract: A plurality of water heaters are connected in parallel with respect to a hot water supply path, and each of the plurality of water heaters has an exhaust path connected to an exhaust path assembly. Each of a plurality of sensing units is configured to be shifted from an electrically conducting state to an electrically non-conducting state when each of the plurality of sensing units senses an abnormal condition about air supply or exhaust. A series circuit of the plurality of sensing units is electrically connected in series to a resistance element between the power supply line and the ground line. The controller is configured to monitor an abnormal condition about air supply or exhaust based on a voltage on a node between the series circuit and the resistance element.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: July 2, 2019
    Assignee: NORITZ CORPORATION
    Inventors: Shinichi Okamoto, Takao Muko
  • Patent number: 10240818
    Abstract: A controller is configured to set total stop in which operations of all of a plurality of water heaters are stopped when an abnormal condition of a fan or an abnormal condition in communication is sensed in any of the plurality of water heaters while at least one of the plurality of water heaters is operating. The controller is further configured not to set total stop when an abnormal condition of the fan or an abnormal condition in communication is sensed in at least one of the plurality of water heaters while a sensing element for sensing a backflow of an exhaust from an exhaust path assembly is connected to the controller.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: March 26, 2019
    Assignee: NORITZ CORPORATION
    Inventors: Takao Muko, Shinichi Okamoto
  • Patent number: 10168047
    Abstract: A control unit includes a scale detection unit for detecting, while the a burner provides combustion, occurrence of clogging with scale in a tube of a heat exchanger, and an output unit for outputting a result of a detection by the scale detection unit, a storage stores information including a numerical value representing how many times a surface temperature of the heat exchanger measured by a temperature measuring unit exceeds at least one of a plurality of threshold values. While the burner provides combustion when the surface temperature measured by the temperature measuring unit exceeds at least one of the plurality of threshold values the scale detection unit adds a predetermined value to the numerical value in the storage and when the numerical value attains a defined value or more the scale detection unit detects occurrence of clogging with scale.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: January 1, 2019
    Assignee: NORITZ CORPORATION
    Inventors: Isao Satoh, Takao Muko, Yuiko Yano, Yuki Maeshima
  • Publication number: 20180252437
    Abstract: A plurality of water heaters are connected in parallel with respect to a hot water supply path, and each of the plurality of water heaters has an exhaust path connected to an exhaust path assembly. Each of a plurality of sensing units is configured to be shifted from an electrically conducting state to an electrically non-conducting state when each of the plurality of sensing units senses an abnormal condition about air supply or exhaust. A series circuit of the plurality of sensing units is electrically connected in series to a resistance element between the power supply line and the ground line. The controller is configured to monitor an abnormal condition about air supply or exhaust based on a voltage on a node between the series circuit and the resistance element.
    Type: Application
    Filed: February 21, 2018
    Publication date: September 6, 2018
    Applicant: NORITZ CORPORATION
    Inventors: Shinichi OKAMOTO, Takao MUKO
  • Publication number: 20180252418
    Abstract: A water heating system includes a plurality of water heaters of which exhaust paths are connected in common to an exhaust path assembly, a control device configured for centralized control of the plurality of water heaters, and a non-volatile storage unit. The plurality of water heaters include control units configured to control hot water supply operations based on communication with the control device, respectively. The storage unit is configured to store information on the water heater of which control unit is recorded to have established communication with the control device. The control device turns off all of the plurality of water heaters when information on the water heater of which control unit has currently established communication with the control device does not match with the information stored in the storage unit.
    Type: Application
    Filed: February 21, 2018
    Publication date: September 6, 2018
    Applicant: NORITZ CORPORATION
    Inventors: Shinichi OKAMOTO, Takao MUKO
  • Publication number: 20180112890
    Abstract: A combustion device includes a combustion control section which controls combustion in the combustion device; a setting section operated to set information indicating whether or not a plurality of combustion devices are in a common vent discharge state; and a memory section which stores therein connection configurations with the other combustion control sections to which the combustion control section is communicatively connected, and the combustion control section determines whether or not the combustion control section can communicate with a linkage control section or the other combustion control sections, and inhibits combustion in the combustion device to which the combustion control section belongs, in a case where the combustion control section determines that the combustion control section cannot communicate with the linkage control section or at least one of the other combustion control sections and the common vent discharge state is set by the setting section.
    Type: Application
    Filed: October 13, 2017
    Publication date: April 26, 2018
    Applicant: NORITZ CORPORATION
    Inventors: Shinichi OKAMOTO, Takao MUKO
  • Publication number: 20180112891
    Abstract: A controller is configured to set total stop in which operations of all of a plurality of water heaters are stopped when an abnormal condition of a fan or an abnormal condition in communication is sensed in any of the plurality of water heaters while at least one of the plurality of water heaters is operating. The controller is further configured not to set total stop when an abnormal condition of the fan or an abnormal condition in communication is sensed in at least one of the plurality of water heaters while a sensing element for sensing a backflow of an exhaust from an exhaust path assembly is connected to the controller.
    Type: Application
    Filed: October 13, 2017
    Publication date: April 26, 2018
    Applicant: NORITZ CORPORATION
    Inventors: Takao MUKO, Shinichi OKAMOTO
  • Publication number: 20170108211
    Abstract: A control unit includes a scale detection unit for detecting, while the a burner provides combustion, occurrence of clogging with scale in a tube of a heat exchanger, and an output unit for outputting a result of a detection by the scale detection unit, a storage stores information including a numerical value representing how many times a surface temperature of the heat exchanger measured by a temperature measuring unit exceeds at least one of a plurality of threshold values. While the burner provides combustion when the surface temperature measured by the temperature measuring unit exceeds at least one of the plurality of threshold values the scale detection unit adds a predetermined value to the numerical value in the storage and when the numerical value attains a defined value or more the scale detection unit detects occurrence of clogging with scale.
    Type: Application
    Filed: April 22, 2016
    Publication date: April 20, 2017
    Applicant: NORITZ CORPORATION
    Inventors: Isao SATOH, Takao MUKO, Yuiko YANO, Yuki MAESHIMA