Patents by Inventor Takashi Kawakubo

Takashi Kawakubo 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).

  • Publication number: 20190135084
    Abstract: In a heat exchange unit, a shutter device is disposed on a vehicle front side with respect to a coolant heat exchanger to open and close a passage for traveling air directed toward the coolant heat exchanger. A blower is switchable between a first blowing state in which air flows from the vehicle front side to the vehicle rear side and a second blowing state in which air flows from the vehicle rear side to the vehicle front side. In a case where a switch that makes a vehicle travelable is in an on state, a control unit switches the blower to the second blowing state, while an open degree of the shutter device is set at a closing side from a maximum open degree of the shutter device when a temperature of the engine coolant is equal to or lower than a predetermined temperature determination value.
    Type: Application
    Filed: March 2, 2017
    Publication date: May 9, 2019
    Inventors: Go SATO, Takashi YASUDA, Koichi HARADA, Ken MUTO, Masaaki KAWAKUBO, Nobukazu KURIBAYASHI, Hiroyuki SAKANE
  • Patent number: 10252528
    Abstract: According to one embodiment, an inkjet recording head includes a plurality of ink pressure chambers arranged in a first direction, a nozzle communicating with each of the ink pressure chambers, a plurality of individual ink supply paths which are arranged in a second direction and communicate with one end of each of the ink pressure chambers, a plurality of individual ink discharge paths which are arranged in the second direction and communicate with another end of each of the ink pressure chambers, a plurality of actuators configured to apply pressure to ink in the ink pressure chambers, a common ink supply path communicating with an end of each of the individual ink supply paths, and a common ink discharge path communicating with an end of each of the individual ink discharge paths.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: April 9, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventors: Takashi Kawakubo, Kazuhide Abe, Ryutaro Kusunoki
  • Publication number: 20180194134
    Abstract: According to one embodiment, an inkjet recording head includes a plurality of ink pressure chambers arranged in a first direction, a nozzle communicating with each of the ink pressure chambers, a plurality of individual ink supply paths which are arranged in a second direction and communicate with one end of each of the ink pressure chambers, a plurality of individual ink discharge paths which are arranged in the second direction and communicate with another end of each of the ink pressure chambers, a plurality of actuators configured to apply pressure to ink in the ink pressure chambers, a common ink supply path communicating with an end of each of the individual ink supply paths, and a common ink discharge path communicating with an end of each of the individual ink discharge paths.
    Type: Application
    Filed: August 25, 2017
    Publication date: July 12, 2018
    Inventors: Takashi Kawakubo, Kazuhide Abe, Ryutaro Kusunoki
  • Patent number: 9415597
    Abstract: An ink jet head includes: a pressure chamber to be filled with ink formed in a pressure chamber structure, the pressure chamber in which an etching limiter made of a material different from a material of the pressure chamber structure is formed on an inner wall surface of the pressure chamber; a nozzle plate comprising a nozzle that leading to the pressure chamber and a movable range fitted to the etching limiter; and a flat driver comprising a piezoelectric body to operate the movable range and arranged on the nozzle plate.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: August 16, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takashi Kawakubo, Kazuhide Abe, Yasushi Tomizawa, Ryuichi Arai, Ryutaro Kusunoki, Osamu Takagi
  • Patent number: 9358785
    Abstract: According to one embodiment, an inkjet head includes a nozzle plate including a first surface, a second surface opposite to the first surface, a through hole configured to make the first surface communicate with the second surface, and a cylindrical member integrally extending from the second surface by extending the through hole. An ink pressure chamber communicating with the cylindrical member and the through hole is provided on the second surface side of the nozzle plate. This inkjet head also includes an actuator which discharges ink in the ink pressure chamber from the through hole by displacing the nozzle plate.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: June 7, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Takashi Kawakubo, Kazuhide Abe, Yasushi Tomizawa, Ryuichi Arai, Ryutaro Kusunoki, Osamu Takagi
  • Patent number: 9340018
    Abstract: An inkjet head includes: a pressure chamber in which ink is filled; a nozzle plate which is provided on a first surface of the pressure chamber and which includes a nozzle communicating with the pressure chamber; and a planar drive section which is formed on the nozzle plate so as to extend from above a partition wall of the pressure chamber to above the pressure chamber, excluding a hole area around the nozzle and which has a piezoelectric body.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: May 17, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takashi Kawakubo, Ryuichi Arai, Ryutaro Kusunoki, Osamu Takagi
  • Publication number: 20160052272
    Abstract: According to one embodiment, an inkjet head includes a nozzle plate including a first surface, a second surface opposite to the first surface, a through hole configured to make the first surface communicate with the second surface, and a cylindrical member integrally extending from the second surface by extending the through hole. An ink pressure chamber communicating with the cylindrical member and the through hole is provided on the second surface side of the nozzle plate. This inkjet head also includes an actuator which discharges ink in the ink pressure chamber from the through hole by displacing the nozzle plate.
    Type: Application
    Filed: December 17, 2014
    Publication date: February 25, 2016
    Inventors: Takashi KAWAKUBO, Kazuhide ABE, Yasushi TOMIZAWA, Ryuichi ARAI, Ryutaro KUSUNOKI, Osamu TAKAGI
  • Publication number: 20150343783
    Abstract: A method of manufacturing an inkjet head includes: forming an annular groove on a first surface of a substrate made of a first material; forming a side wall by filling a second material in the annular groove and forming a nozzle plate by forming a thin film made of the second material on the first surface of the substrate; forming a ring-shaped piezoelectric element on the nozzle plate surrounded by the side wall, the piezoelectric element comprising a lower electrode, a piezoelectric film, and an upper electrode; forming a ink chamber disposed over an area of a lower surface of the nozzle plate that is surrounded by the side wall from a second surface opposite the first surface of the substrate, the ink chamber being formed by a single dry etching process; and forming a nozzle to the nozzle plate positioned inside of the annular piezoelectric element.
    Type: Application
    Filed: August 10, 2015
    Publication date: December 3, 2015
    Inventors: Takashi KAWAKUBO, Kazuhide ABE, Yasushi TOMIZAWA, Ryuichi ARAI, Ryutaro KUSUNOKI, Osamu TAKAGI
  • Publication number: 20150085022
    Abstract: An ink jet head includes: a pressure chamber to be filled with ink formed in a pressure chamber structure, the pressure chamber in which an etching limiter made of a material different from a material of the pressure chamber structure is formed on an inner wall surface of the pressure chamber; a nozzle plate comprising a nozzle that leading to the pressure chamber and a movable range fitted to the etching limiter; and a flat driver comprising a piezoelectric body to operate the movable range and arranged on the nozzle plate.
    Type: Application
    Filed: March 6, 2014
    Publication date: March 26, 2015
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Takashi KAWAKUBO, Kazuhide ABE, Yasushi TOMIZAWA, Ryuichi ARAI, Ryutaro KUSUNOKI, Osamu TAKAGI
  • Publication number: 20150062254
    Abstract: An inkjet head includes: a pressure chamber in which ink is filled; a nozzle plate which is provided on a first surface of the pressure chamber and which includes a nozzle communicating with the pressure chamber; and a planar drive section which is formed on the nozzle plate so as to extend from above a partition wall of the pressure chamber to above the pressure chamber, excluding a hole area around the nozzle and which has a piezoelectric body.
    Type: Application
    Filed: November 8, 2013
    Publication date: March 5, 2015
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Takashi KAWAKUBO, Ryuichi ARAI, Ryutaro KUSUNOKI, Osamu TAKAGI
  • Patent number: 8746857
    Abstract: An inkjet recording head of an embodiment includes: an elastic film provided to form a part of a pressure-generating chamber connected to a nozzle opening; and a piezoelectric film-laminated part, an end thereof being fixed to the elastic film, a central part thereof facing the elastic film having an air gap in-between, the piezoelectric film-laminated part including a lower electrode, a piezoelectric film, and an upper electrode.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: June 10, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Takashi Kawakubo, Kazuhiko Itaya, Chiaki Tanuma
  • Patent number: 8648431
    Abstract: According to one embodiment, an acoustic semiconductor device includes an element unit, and a first terminal. The element unit includes an acoustic resonance unit. The acoustic resonance unit includes a semiconductor crystal. An acoustic standing wave is excitable in the acoustic resonance unit and is configured to be synchronously coupled with electric charge density within at least one portion of the semiconductor crystal via deformation-potential coupling effect. The first terminal is electrically connected to the element unit. At least one selected from outputting and inputting an electrical signal is implementable via the first terminal. The electrical signal is coupled with the electric charge density. The outputting the electrical signal is from the acoustic resonance unit, and the inputting the electrical signal is into the acoustic resonance unit.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: February 11, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuhide Abe, Tadahiro Sasaki, Atsuko Iida, Kazuhiko Itaya, Takashi Kawakubo
  • Patent number: 8497672
    Abstract: The present embodiments provide an acceleration sensor, which enables highly accurate detection and has an extremely compact size. The acceleration sensor of the present embodiments is provided with a substrate, a anchor portion formed on the substrate, a support beam, which has one end connected to the anchor portion and extends across a space from the substrate, and a proof mass which is connected to the other end of the support beam and held across a space from the substrate. The acceleration sensor is further provided with first and second piezoelectric bending resonators, a comparison unit, and a calculation unit. The first and second piezoelectric bending resonators have one end connected to the anchor portion and the other end connected to the proof mass or the support beam and have a stack of a first electrode, a first piezoelectric film, and a second electrode.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: July 30, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Kawakubo, Toshihiko Nagano, Michihiko Nishigaki, Hiroshi Ono
  • Publication number: 20130100211
    Abstract: An inkjet recording head of an embodiment includes: an elastic film provided to form a part of a pressure-generating chamber connected to a nozzle opening; and a piezoelectric film-laminated part, an end thereof being fixed to the elastic film, a central part thereof facing the elastic film having an air gap in-between, the piezoelectric film-laminated part including a lower electrode, a piezoelectric film, and an upper electrode.
    Type: Application
    Filed: October 12, 2012
    Publication date: April 25, 2013
    Inventors: Takashi KAWAKUBO, Kazuhiko ITAYA, Chiaki TANUMA
  • Patent number: 8395462
    Abstract: A resonator according to the embodiment includes: a substrate; a flat layered body which is formed above the substrate and is formed with at least a lower electrode, a piezoelectric film and an upper electrode; an anchor portion which fixes the layered body above the substrate; a cut-out portion inside the layered body; a tuning fork vibrator which is formed in the cut-out portion, has both ends supported by the layered body and is formed with at least a lower electrode, a piezoelectric film and an upper electrode; and an envelope which envelopes the layered body and the tuning fork vibrator in a noncontact fashion, and prevents an external force from being applied to the layered body and the tuning fork vibrator.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: March 12, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Kawakubo, Toshihiko Nagano, Michihiko Nishigaki, Hiroshi Ono
  • Publication number: 20120241877
    Abstract: According to one embodiment, an acoustic semiconductor device includes an element unit, and a first terminal. The element unit includes an acoustic resonance unit. The acoustic resonance unit includes a semiconductor crystal. An acoustic standing wave is excitable in the acoustic resonance unit and is configured to be synchronously coupled with electric charge density within at least one portion of the semiconductor crystal via deformation-potential coupling effect. The first terminal is electrically connected to the element unit. At least one selected from outputting and inputting an electrical signal is implementable via the first terminal. The electrical signal is coupled with the electric charge density. The outputting the electrical signal is from the acoustic resonance unit, and the inputting the electrical signal is into the acoustic resonance unit.
    Type: Application
    Filed: August 29, 2011
    Publication date: September 27, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kazuhide ABE, Tadahiro Sasaki, Atsuko Iida, Kazuhiko Itaya, Takashi Kawakubo
  • Publication number: 20120206018
    Abstract: A resonator according to the embodiment includes: a substrate; a flat layered body which is formed above the substrate and is formed with at least a lower electrode, a piezoelectric film and an upper electrode; an anchor portion which fixes the layered body above the substrate; a cut-out portion inside the layered body; a tuning fork vibrator which is formed in the cut-out portion, has both ends supported by the layered body and is formed with at least a lower electrode, a piezoelectric film and an upper electrode; and an envelope which envelopes the layered body and the tuning fork vibrator in a noncontact fashion, and prevents an external force from being applied to the layered body and the tuning fork vibrator.
    Type: Application
    Filed: March 16, 2012
    Publication date: August 16, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takashi Kawakubo, Toshihiko Nagano, Michihiko Nishigaki, Hiroshi Ono
  • Patent number: 8189319
    Abstract: A MEMS variable capacitor includes: a first connection beam having one end fixed to a substrate; a first actuation beam connected to the first connection beam; a second actuation beam connected to the first actuation beam and extending in a reverse direction; a second connection beam having one end fixed to the substrate; a third actuation beam connected to the second connection beam; a fourth actuation beam connected to the third actuation beam and extending in a reverse direction; a movable electrode provided between the second and fourth actuation beams; and a fixed electrode provided on the substrate opposed to the movable electrode. The first to fourth actuation beams have a piezoelectric film sandwiched between a lower electrode and an upper electrode, the first and third actuation beams are placed on a line, the second and fourth actuation beams are placed on a line, and the first and second actuation beams and the third and fourth actuation beams are placed symmetrically about a line.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: May 29, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Kawakubo, Toshihiko Nagano, Michihiko Nishigaki, Kazuhiko Itaya
  • Patent number: 8117912
    Abstract: In a angular rate sensor, a weight and a base are connected directly through piezoelectric bimorph detectors and piezoelectric bimorph exciters each having a bent portion. When acceleration is applied to the weight, the weight is displaced so as to deform the piezoelectric bimorph detectors. Due to this deformation, charges generated in the piezoelectric bimorph detectors are detected so as to detect acceleration. If an angular rate is applied to the weight when the weight is vibrated by the piezoelectric bimorph exciters, Coriolis force is generated in the weight so as to deform the piezoelectric bimorph detectors. Due to this deformation, charges generated in the piezoelectric bimorph detectors are detected so as to detect the angular rate.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: February 21, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Kawakubo, Toshihiko Nagano, Michihiko Nishigaki
  • Patent number: 8109144
    Abstract: A multi-axis accelerometer or a multi-axis angular rate sensor which can be made by an easy process and the size of which can be greatly reduced is provided. An inertia sensor has a substrate, a flat proofmass formed on the substrate and a stacked structure including at least a lower electrode, a piezoelectric film, and an upper electrode, an anchor unit formed in a cutout inside of the proofmass and fixed on the substrate, and a plurality of flat piezoelectric beams each having one end connected to the proofmass, the other end connected to the anchor unit, and a stacked structure formed in a cutout inside of the proofmass and including at least a lower electrode, a piezoelectric film, and an upper electrode, wherein the inertia sensor enables to detect an acceleration applied on the proofmass based on charges generated to the electrodes of the piezoelectric beams.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: February 7, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Kawakubo, Toshihiko Nagano, Michihiko Nishigaki