Patents by Inventor Hiroshi Yamagata

Hiroshi Yamagata 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: 20210400378
    Abstract: A unidirectional microphone includes: a case having a shape of a bottomed cylinder and including a sound hole in a bottom thereof; a ring-shaped diaphragm fixed to the bottom in the case; a vibrating membrane stretched on the diaphragm; a backplate which has a shape of a bottomed cylinder and is housed in the case in a nested manner such that an air gap to serve as a sound propagation path is formed between the backplate and an inner surface of the case, the backplate including an aperture serving as a sound propagation path in a side face thereof; a spacer positioned between the diaphragm and the backplate to fix the diaphragm and the backplate, and including a notch serving as a sound propagation path in a portion thereof; and a base plate covering a top opening of the case and including a hole serving as a sound propagation path.
    Type: Application
    Filed: May 20, 2021
    Publication date: December 23, 2021
    Applicant: HOSIDEN CORPORATION
    Inventors: Hiroshi YAMAGATA, Hironori SAEKI, Tsuyoshi BABA, Ryuji AWAMURA, Kensuke NAKANISHI
  • Publication number: 20210257647
    Abstract: A fuel cell assembly is mounted on a vehicle via a mounting portion. The fuel cell assembly includes a first fuel cell unit, a first frame portion on which the first fuel cell unit is mounted and fixed, a second fuel cell unit, a second frame portion on which the second fuel cell unit is mounted and fixed, and a connecting portion that connects the first frame portion and the second frame portion such that the second fuel cell unit is located above the first fuel cell unit.
    Type: Application
    Filed: February 12, 2021
    Publication date: August 19, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, HINO MOTORS, LTD.
    Inventors: Yasuhiko OHHASHI, Hiroshi YAMAGATA, Yuta KOMATSU, Kohei HAMANO
  • Publication number: 20200173686
    Abstract: The present invention provides a heat pump type hot water supplying device that has solved the inconvenience of an antifreeze operation being not carried out due to the phenomenon of a backflow from a hot water storage tank without increasing the number of components. A control device 70 carries out an antifreeze operation, in which a water pump 23 is operated, if the temperature of water for hot water supply in a hot water supply circuit 20 positioned in a heating unit 50 decreases to a predetermined value or less. The water pump 23 is operated if the temperature of the water for hot water supply in the hot water supply circuit 20 positioned in the heating unit 50 increases while the water pump 23 is in a stopped state.
    Type: Application
    Filed: May 11, 2017
    Publication date: June 4, 2020
    Inventors: Hayahiko TAKAGI, Hiroshi YAMAGATA
  • Patent number: 10213829
    Abstract: Disclosed is a cylinder liner having a high bonding strength to a cylinder block. Further disclosed is a method for producing the same. The cylinder liner uses a silicon-aluminum alloy as a material; a plurality of protrusions are formed on the external surface thereof; and the protrusions each contain a pillar section extending from the external surface, and a head section formed at the end of the pillar section.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: February 26, 2019
    Assignee: MORESCO CORPORATION
    Inventors: Hiroshi Yamagata, Hidetaka Shima
  • Publication number: 20160332225
    Abstract: Disclosed is a cylinder liner having a high bonding strength to a cylinder block. Further disclosed is a method for producing the same. The cylinder liner uses a silicon-aluminum alloy as a material; a plurality of protrusions are formed on the external surface thereof; and the protrusions each contain a pillar section extending from the external surface, and a head section formed at the end of the pillar section.
    Type: Application
    Filed: July 7, 2016
    Publication date: November 17, 2016
    Applicant: MORESCO CORPORATION
    Inventors: Hiroshi YAMAGATA, Hidetaka SHIMA
  • Patent number: 9427801
    Abstract: Disclosed is a cylinder liner having a high bonding strength to a cylinder block. Further disclosed is a method for producing the same. The cylinder liner uses a silicon-aluminum alloy as a material; a plurality of protrusions are formed on the external surface thereof; and the protrusions each contain a pillar section extending from the external surface, and a head section formed at the end of the pillar section.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: August 30, 2016
    Assignee: MORESCO CORPORATION
    Inventors: Hiroshi Yamagata, Hidetaka Shima
  • Patent number: 8879752
    Abstract: A microphone capable of canceling vibration noise caused by mechanical vibration is provided with, in capsules, a pair of diaphragms and a pair of back plates opposite to the respective diaphragms. A printed circuit board is disposed at the middle of capsules. A pair of diaphragms is disposed close and opposite to the surfaces of the printed circuit board with the printed circuit board disposed therebetween. The difference in distance from a vibration source to the two diaphragms is made small. The microphone has a high canceling effect for canceling vibration noise caused by mechanical vibration.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: November 4, 2014
    Assignee: Hosiden Corporation
    Inventors: Hiroyuki Harano, Hiroshi Yamagata, Kazuo Ono, Kensuke Nakanishi
  • Patent number: 8724839
    Abstract: A unidirectional microphone includes a cylindrical capsule, a front plate blocking one end of the cylindrical capsule, a front plate sound hole formed in the front plate, a vibrating membrane and a first rear pole plate that are housed in the cylindrical capsule and form capacitance, a substrate blocking another open end of the capsule, and a rear plate sound hole formed in the substrate. The front plate sound hole and the rear plate sound hole are placed on mutually opposite sides of a central axis of the capsule so as to be offset relative to the central axis. The directional axis can be significantly offset relative to the central axis of the microphone using the microphone alone.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: May 13, 2014
    Assignee: Hosiden Corporation
    Inventors: Hiroyuki Harano, Hiroshi Yamagata, Kazuo Ono, Kensuke Nakanishi
  • Patent number: 8391531
    Abstract: There is provided a condenser microphone that has improved portability and that can be realized at low costs.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: March 5, 2013
    Assignee: Hosiden Corporation
    Inventors: Hiroyuki Harano, Hiroshi Yamagata, Kazuo Ono, Kensuke Nakanishi
  • Patent number: 8358259
    Abstract: The present invention provides a liquid crystal display device which can obviate the generation of leaking of light and display irregularities in the vicinities of so-called dummy pixels. The liquid crystal display device includes a pair of substrates which are arranged to face each other in an opposed manner with liquid crystal sandwiched therebetween, a plurality of gate signal lines and a plurality of drain signal lines which are formed on one substrate in a matrix array, a plurality of pixel regions defined by the gate signal lines and the drain signal lines, and a reference electrode and a pixel electrode which are formed in the inside of each pixel region. In such a constitution, the plurality of pixel regions are formed in both a display region and a non-display region, and a voltage applied to the reference electrodes is applied to the pixel electrodes in the inside of the pixel regions in the non-display region.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: January 22, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Nagatoshi Kurahashi, Masahiro Ishii, Hiroshi Yamagata
  • Publication number: 20130010981
    Abstract: A microphone capable of canceling vibration noise caused by mechanical vibration is provided with, in capsules, a pair of diaphragms and a pair of back plates opposite to the respective diaphragms. A printed circuit board is disposed at the middle of capsules. A pair of diaphragms is disposed close and opposite to the surfaces of the printed circuit board with the printed circuit board disposed therebetween. The difference in distance from a vibration source to the two diaphragms is made small. The microphone has a high canceling effect for canceling vibration noise caused by mechanical vibration.
    Type: Application
    Filed: March 10, 2011
    Publication date: January 10, 2013
    Applicant: HOSIDEN CORPORATION
    Inventors: Hiroyuki Harano, Hiroshi Yamagata, Kazuo Ono, Kensuke Nakanishi
  • Publication number: 20120304852
    Abstract: Disclosed is a cylinder liner having a high bonding strength to a cylinder block. Further disclosed is a method for producing the same. The cylinder liner uses a silicon-aluminum alloy as a material; a plurality of protrusions are formed on the external surface thereof; and the protrusions each contain a pillar section extending from the external surface, and a head section formed at the end of the pillar section.
    Type: Application
    Filed: March 2, 2011
    Publication date: December 6, 2012
    Applicant: MORESCO CORPORATION
    Inventors: Hiroshi Yamagata, Hidetaka Shima
  • Patent number: 8312856
    Abstract: A method of making a forged piston includes the steps of providing a workpiece made of an aluminum alloy, a magnesium alloy or a titanium alloy; and forging the workpiece with stress applied thereto in a predetermined direction (forging direction). The method further includes, before the step of forging, the step of working the workpiece such that fiber flows of the workpiece are nonparallel to the predetermined direction.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: November 20, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Hiroshi Yamagata, Hirotaka Kurita
  • Publication number: 20120195453
    Abstract: A unidirectional microphone includes a cylindrical capsule, a front plate blocking one end of the cylindrical capsule, a front plate sound hole formed in the front plate, a vibrating membrane and a first rear pole plate that are housed in the cylindrical capsule and form capacitance, a substrate blocking another open end of the capsule, and a rear plate sound hole formed in the substrate. The front plate sound hole and the rear plate sound hole are placed on mutually opposite sides of a central axis of the capsule so as to be offset relative to the central axis. The directional axis can be significantly offset relative to the central axis of the microphone using the microphone alone.
    Type: Application
    Filed: September 9, 2010
    Publication date: August 2, 2012
    Applicant: Hosiden Corporation
    Inventors: Hiroyuki Harano, Hiroshi Yamagata, Kazuo Ono, Kensuke Nakanishi
  • Patent number: 8047174
    Abstract: An internal combustion engine component is composed of an aluminum alloy containing silicon, and includes a plurality of silicon crystal grains located on a slide surface. The slide surface has a ten point-average roughness RzJIS of about 0.54 ?m or more, and a load length ratio Rmr(30) at a cut level of about 30% of the slide surface is about 20% or more.
    Type: Grant
    Filed: December 25, 2007
    Date of Patent: November 1, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Shinya Iwasaki, Hiroshi Yamagata, Hirotaka Kurita
  • Patent number: 8011271
    Abstract: A connecting rod is a fracture split-type connecting rod made of an ?+? type titanium alloy, including a rod main body and a big end provided at an end of the rod main body, the big end being fracture-split. The structure of the rod main body is an equiaxed ? structure, and the structure of fractured surfaces of the big end is an acicular ? structure.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: September 6, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Tsuyoshi Kubota, Hiroshi Yamagata
  • Publication number: 20110002483
    Abstract: There is provided a condenser microphone that has improved portability and that can be realized at low costs.
    Type: Application
    Filed: June 16, 2010
    Publication date: January 6, 2011
    Applicant: HOSIDEN CORPORATION
    Inventors: Hiroyuki Harano, Hiroshi Yamagata, Kazuo Ono, Kensuke Nakanishi
  • Patent number: 7839457
    Abstract: A display image correcting device including, retaining section configured to retain reference correction amount data for correcting nonuniformity as a predetermined factor of an image displayed on a basis of a video signal, the reference correction amount data representing an amount of correction at a predetermined horizontal and vertical position of the image, the amount of correction being obtained in correspondence with a video signal level as a reference, and correcting section configured to perform correction processing on the video signal in correspondence with a horizontal direction and a vertical direction of the image, and a brightness direction, and performing the correction processing on a basis of three-dimensional correction amount data obtained by making two-dimensional correction amount data corresponding to a horizontal and vertical position, the two-dimensional correction amount data being obtained on a basis of the reference correction amount data, linearly proportional or nonlinearly propor
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: November 23, 2010
    Assignee: Sony Corporation
    Inventors: Hiroshi Yamagata, Yoshiki Shirochi, Toshinari Fuchigami, Akira Shirahama
  • Patent number: 7802493
    Abstract: A connecting rod includes a rod main body, a small end located at one end of the rod main body and a big end located at another end of the rod main body, the big end including a curved section which is curved so as to become narrower toward the rod main body. The big end is formed of a metal material whose composition is different from that of the rod main body, and is bonded to the rod main body. A joint between the big end and the rod main body is located closer to the small end than is an end of the curved section facing the rod main body.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: September 28, 2010
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Tsuyoshi Kubota, Hirotaka Kurita, Hiroshi Yamagata
  • Publication number: 20100229822
    Abstract: An engine component is composed of an aluminum alloy containing silicon, and includes a plurality of primary-crystal silicon grains located on a slide surface. The plurality of primary-crystal silicon grains have an average crystal grain size of no less than about 12 ?m and no more than about 50 ?m.
    Type: Application
    Filed: May 28, 2010
    Publication date: September 16, 2010
    Applicant: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Hirotaka KURITA, Hiroshi YAMAGATA, Toshikatsu KOIKE