Patents by Inventor Takao Ishikawa

Takao Ishikawa 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: 10887702
    Abstract: To make it possible to take countermeasures against noises of a loudspeaker by means of a simple configuration. A loudspeaker 10 includes: a bobbin 15 that is provided with a voice coil 31; a diaphragm 13 that is connected to the bobbin 15; a frame 11 that supports the diaphragm 13; and a magnetic circuit section 17 that includes a magnet 22. The loudspeaker 10 further includes: a first conductive body 41 that is connected to the voice coil 31 and is led out to the outside of a bobbin 15A; and a second conductive body 51 that is connected to the first conductive body 41 and penetrates the magnet 22.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: January 5, 2021
    Assignee: CLARION CO., LTD.
    Inventors: Minoru Ueno, Takao Ishikawa, Fumiaki Nakashima
  • Publication number: 20200248617
    Abstract: The invention provides a cogeneration system capable of adjusting a heat-to-electric power ratio not only in an increasing direction, but also in a decreasing direction. The cogeneration system includes: a power generation device configured to supply electric power; a first heat exchanger configured to exchange heat between exhaust of the power generation device and water, so as to lower a temperature of the exhaust and obtain steam from the water; a reformer configured to generate a reformed gas by the steam reacting with a fuel; a second heat exchanger configured to cool the reformed gas generated by the reformer by heat exchanging; a reformed gas supply device configured to supply the reformed gas cooled by the second heat exchanger to the power generation device; a distributor configured to supply the steam to at least one of the reformer and a heat utilization device; and a control device configure to adjust a heat-to-electric power ratio by changing a supply destination of the steam in the distributor.
    Type: Application
    Filed: January 31, 2020
    Publication date: August 6, 2020
    Inventors: Yuzo SHIRAKAWA, Hiroto NAITO, Takao ISHIKAWA
  • Patent number: 10696201
    Abstract: In a headrest including a core member, an acoustic speaker, and an acoustic microphone, the acoustic microphone is provided in a recessed portion provided in the core member, and a sound collection surface of the acoustic microphone is provided in a position rearward of a vibrating surface of the acoustic speaker. An opening at a tip end of the recessed portion can be provided in a position forward of a tip end of the vibrating surface of the acoustic speaker. The recessed portion can be formed into a shape that narrows from the opening toward a bottom surface. Even when the acoustic microphone is provided near to the acoustic speaker, accuracy of voice recognition by the acoustic microphone can be prevented from being reduced.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: June 30, 2020
    Assignee: CLARION CO., LTD.
    Inventors: Tsutomu Fujikake, Takao Ishikawa, Shingo Takei, Naoki Takada
  • Publication number: 20200053481
    Abstract: To make it possible to take countermeasures against noises of a loudspeaker by means of a simple configuration. A loudspeaker 10 includes: a bobbin 15 that is provided with a voice coil 31; a diaphragm 13 that is connected to the bobbin 15; a frame 11 that supports the diaphragm 13; and a magnetic circuit section 17 that includes a magnet 22. The loudspeaker 10 further includes: a first conductive body 41 that is connected to the voice coil 31 and is led out to the outside of a bobbin 15A; and a second conductive body 51 that is connected to the first conductive body 41 and penetrates the magnet 22.
    Type: Application
    Filed: May 8, 2018
    Publication date: February 13, 2020
    Applicant: CLARION CO., LTD.
    Inventors: Minoru UENO, Takao ISHIKAWA, Fumiaki NAKASHIMA
  • Patent number: 10328831
    Abstract: To make it possible to improve a low-tone reproducing ability with a simple structure in an acoustic device including speakers in a headrest. The acoustic device includes a core material of a closed structure functioning as a core of a headrest main body, acoustic speakers 50, 50 disposed in the core material, and hollow headrest stays 15, 15 that pierce through the core material. The headrest stays 15, 15 circulate the air on the inside of the core material to the outer side via hollow sections.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: June 25, 2019
    Assignees: CLARION CO., LTD., TACHI-S CO., LTD.
    Inventors: Naoki Takada, Fumiaki Nakashima, Takao Ishikawa, Takahiko Nagasawa, Yasuyuki Ito
  • Publication number: 20190118688
    Abstract: In a headrest including a core member, an acoustic speaker, and an acoustic microphone, the acoustic microphone is provided in a recessed portion provided in the core member, and a sound collection surface of the acoustic microphone is provided in a position rearward of a vibrating surface of the acoustic speaker. An opening at a tip end of the recessed portion can be provided in a position forward of a tip end of the vibrating surface of the acoustic speaker. The recessed portion can be formed into a shape that narrows from the opening toward a bottom surface. Even when the acoustic microphone is provided near to the acoustic speaker, accuracy of voice recognition by the acoustic microphone can be prevented from being reduced.
    Type: Application
    Filed: May 19, 2017
    Publication date: April 25, 2019
    Applicant: CLARION CO., LTD.
    Inventors: Tsutomu FUJIKAKE, Takao ISHIKAWA, Shingo TAKEI, Naoki TAKADA
  • Publication number: 20190072058
    Abstract: The air cleaner case includes a valve structure capable of opening and closing a dust discharge port. The valve structure includes: a float member which is disposed below the dust discharge port and can float on water due to its buoyancy; a guide member which holds the float member in a state of being spaced downward from the dust discharge port and, at the time of water immersion, guides the float member ascending due to its buoyancy together with the water level toward the dust discharge port; and a valve body which is spaced downward from the dust discharge port together with the float member to open the dust discharge port and, upon ascent of the float member, comes into contact with the outer circumferential side of the dust discharge port of the bottom wall to close the dust discharge port.
    Type: Application
    Filed: August 20, 2018
    Publication date: March 7, 2019
    Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Kenta KUMAZAWA, Yasushi NARITA, Eita KATO, Kenji IKEDA, Takao ISHIKAWA, Shota YAMADA
  • Patent number: 10197019
    Abstract: An ethanol engine system stabilizes components of reformed gas generated by a reformer and a calorific value of fuel supplied to an engine. The ethanol engine system includes a reservoir tank for an aqueous ethanol solution, a first supply device that supplies the aqueous ethanol solution to the reformer, a separator that cools mixed gas fed from the reformer, including the reformed gas, condenses water vapor included in the mixed gas and separates into gas and liquid, a reformed gas supply device that supplies the reformed gas separated by the separator to the engine, a recovery tank that collects a recovery solution separated by the separator, and a first recovery solution supply device that supplies the recovery solution in the recovery tank to the reformer or a second recovery solution supply device that supplies the recovery solution in the recovery tank to a combustion chamber of the engine.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: February 5, 2019
    Assignee: HITACHI, LTD.
    Inventors: Atsushi Shimada, Takao Ishikawa, Yuzo Shirakawa
  • Patent number: 10183248
    Abstract: An air cleaner includes a housing having an opening and a filter assembly. The filter assembly is installed in and removed from the housing through the opening. When the filter assembly is at an installation position, a sealing portion of a filter element is pressed against a sealing surface of the housing. The frame includes a frame body, which supports the filter element, and a front engaging portion, which projects further forward in the insertion direction than the frame body. The housing includes a projection, which is engaged with the front engaging portion during insertion of the filter assembly. The front engaging portion and the projection are engaged with each other to constitute a guiding structure that guides the filter assembly toward the installation position.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: January 22, 2019
    Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventor: Takao Ishikawa
  • Patent number: 10064496
    Abstract: There is provided a head rest device 10 that does not impair safety of a seated person even when a secondary battery 35 is accommodated therein. An accommodation space 28 partitioned by a partitioning plate part 25 is provided inside a cushioning core material 12 of a head rest main body, and a secondary battery 35 is accommodated inside the accommodation space 28.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: September 4, 2018
    Assignee: CLARION CO., LTD.
    Inventors: Naoki Takada, Fumiaki Nakashima, Takao Ishikawa, Takahiko Nagasawa, Yasuyuki Ito
  • Patent number: 9981613
    Abstract: To prevent a person from experiencing discomfort when touching portions of a headrest having built-in speakers; to enable the headrest to be formed compactly by arranging the speakers close to the body of the person; and to prevent any decrease in the acoustic pressure and/or acoustic quality of sound from the speakers. Provided are: a plurality of speakers 25a, 25b; fiber pads 15 provided to the front surfaces of the speakers 25a, 25b; a sound-insulating pad 16 provided between the fiber pads 15; and a surface skin 9 for covering the speakers 25a, 25b, the fiber pads 15, and the sound-insulating pad 16, the fiber pads 15 being formed from an elastic material that has a three-dimensional-mesh structure therein, and the sound-insulating pad 16 being formed from an elastic material for minimizing the transmission of sound.
    Type: Grant
    Filed: May 25, 2015
    Date of Patent: May 29, 2018
    Assignee: TACHI-S CO., LTD.
    Inventors: Yasuyuki Ito, Takahiko Nagasawa, Naoki Takada, Fumiaki Nakashima, Takao Ishikawa
  • Patent number: 9975459
    Abstract: To make it possible to provide an acoustic device in a headrest device such that a standard of a shock is satisfied and the performance of the acoustic device can be efficiently exhibited. In the headrest device, a shock resistant surface is formed in a core material of a headrest main body, an opening is formed in the shock resistant surface, and a non-contact type acoustic microphone is disposed on the inner side of the opening.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: May 22, 2018
    Assignees: CLARION CO., LTD., TACHI-S CO., LTD.
    Inventors: Naoki Takada, Fumiaki Nakashima, Takao Ishikawa, Takahiko Nagasawa, Yasuyuki Ito, Junpei Yoshikawa
  • Publication number: 20170165600
    Abstract: An air cleaner includes a housing having an opening and a filter assembly. The filter assembly is installed in and removed from the housing through the opening. When the filter assembly is at an installation position, a sealing portion of a filter element is pressed against a sealing surface of the housing. The frame includes a frame body, which supports the filter element, and a front engaging portion, which projects further forward in the insertion direction than the frame body. The housing includes a projection, which is engaged with the front engaging portion during insertion of the filter assembly. The front engaging portion and the projection are engaged with each other to constitute a guiding structure that guides the filter assembly toward the installation position.
    Type: Application
    Filed: November 30, 2016
    Publication date: June 15, 2017
    Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventor: Takao ISHIKAWA
  • Publication number: 20170156503
    Abstract: There is provided a head rest device 10 that does not impair safety of a seated person even when a secondary battery 35 is accommodated therein. An accommodation space 28 partitioned by a partitioning plate part 25 is provided inside a cushioning core material 12 of a head rest main body, and a secondary battery 35 is accommodated inside the accommodation space 28.
    Type: Application
    Filed: May 14, 2015
    Publication date: June 8, 2017
    Applicants: CLARION CO., LTD., TACHI-S CO., LTD.
    Inventors: Naoki TAKADA, Fumiaki NAKASHIMA, Takao ISHIKAWA, Takahiko NAGASAWA, Yasuyuki ITO
  • Patent number: 9660284
    Abstract: Provided is a power conversion system having a solid-oxide fuel cell capable of stably generating electricity from hydrogen generated by an organic hydride. The power conversion system includes a solid-oxide fuel cell, a reactor for producing hydrogen and a dehydrogenation product from an organic hydride by dehydrogenation reaction, and a heat engine for generating motive power. The power conversion system separates the hydrogen produced by the reactor, and supplies the hydrogen as fuel to the solid-oxide fuel cell. Exhaust heat of the heat engine is supplied to both the solid-oxide fuel cell and the reactor.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: May 23, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Shimada, Takao Ishikawa, Masatoshi Sugimasa
  • Publication number: 20170106775
    Abstract: To make it possible to improve a low-tone reproducing ability with a simple structure in an acoustic device including speakers in a headrest. The acoustic device includes a core material of a closed structure functioning as a core of a headrest main body, acoustic speakers 50, 50 disposed in the core material, and hollow headrest stays 15, 15 that pierce through the core material. The headrest stays 15, 15 circulate the air on the inside of the core material to the outer side via hollow sections.
    Type: Application
    Filed: May 15, 2015
    Publication date: April 20, 2017
    Applicants: CLARION CO., LTD., TACHI-S CO., LTD.
    Inventors: Naoki TAKADA, Fumiaki NAKASHIMA, Takao ISHIKAWA, Takahiko NAGASAWA, Yasuyuki ITO
  • Publication number: 20170089306
    Abstract: An ethanol engine system stabilizes components of reformed gas generated by a reformer and a calorific value of fuel supplied to an engine. The ethanol engine system includes a reservoir tank for an aqueous ethanol solution, a first supply device that supplies the aqueous ethanol solution to the reformer, a separator that cools mixed gas fed from the reformer, including the reformed gas, condenses water vapor included in the mixed gas and separates into gas and liquid, a reformed gas supply device that supplies the reformed gas separated by the separator to the engine, a recovery tank that collects a recovery solution separated by the separator, and a first recovery solution supply device that supplies the recovery solution in the recovery tank to the reformer or a second recovery solution supply device that supplies the recovery solution in the recovery tank to a combustion chamber of the engine.
    Type: Application
    Filed: May 18, 2015
    Publication date: March 30, 2017
    Applicant: HITACHI, LTD.
    Inventors: Atsushi SHIMADA, Takao ISHIKAWA, Yuzo SHIRAKAWA
  • Publication number: 20170072869
    Abstract: To prevent a person from experiencing discomfort when touching portions of a headrest having built-in speakers; to enable the headrest to be formed compactly by arranging the speakers close to the body of the person; and to prevent any decrease in the acoustic pressure and/or acoustic quality of sound from the speakers. Provided are: a plurality of speakers 25a, 25b; fiber pads 15 provided to the front surfaces of the speakers 25a, 25b; a sound-insulating pad 16 provided between the fiber pads 15; and a surface skin 9 for covering the speakers 25a, 25b, the fiber pads 15, and the sound-insulating pad 16, the fiber pads 15 being formed from an elastic material that has a three-dimensional-mesh structure therein, and the sound-insulating pad 16 being formed from an elastic material for minimizing the transmission of sound.
    Type: Application
    Filed: May 25, 2015
    Publication date: March 16, 2017
    Applicant: TACHI-S CO., LTD
    Inventors: Yasuyuki ITO, Takahiko NAGASAWA, Naoki TAKADA, Fumiaki NAKASHIMA, Takao ISHIKAWA
  • Publication number: 20160257227
    Abstract: To make it possible to provide an acoustic device in a headrest device such that a standard of a shock is satisfied and the performance of the acoustic device can be efficiently exhibited. In the headrest device, a shock resistant surface is formed in a core material of a headrest main body, an opening is formed in the shock resistant surface, and a non-contact type acoustic microphone is disposed on the inner side of the opening.
    Type: Application
    Filed: November 7, 2014
    Publication date: September 8, 2016
    Applicants: CLARION CO., LTD., TACHI-S CO., LTD.
    Inventors: Naoki TAKADA, Fumiaki NAKASHIMA, Takao ISHIKAWA, Takahiko NAGASAWA, Yasuyuki ITO, Junpei YOSHIKAWA
  • Patent number: 9260304
    Abstract: It is an objective of the invention to provide a method for operating hydrogen separation devices which is capable of efficiently suppressing hydrogen embrittlement in a hydrogen separation alloy membrane and to provide a hydrogen separation device that performs favorably during repeated starting/stopping operations thereof. There is provided a method for operating a hydrogen separation device for separating hydrogen from a mixture hydrogen gas using a membrane separation technique with a hydrogen separation alloy membrane. The method comprises the successive steps of: stopping supply of the mixture hydrogen gas to the hydrogen separation alloy membrane with a temperature of the membrane within a range from 300 to 600° C.; supplying an oxidizing gas over a predetermined duration to at least an upstream side of the membrane with a temperature of the membrane within a range from 300 to 600° C.; and lowering the temperature of the membrane to below 200° C.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: February 16, 2016
    Assignee: Hitachi Metals, Ltd.
    Inventors: Takao Ishikawa, Kazuhiro Yamamura