Patents by Inventor Akihito Sakai

Akihito Sakai 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: 20200313583
    Abstract: A motor driving apparatus including a driving circuit for supplying a first pulse with which a first coil included in a two-phase stepping motor generates a first magnetic flux, a second pulse with which a second coil included in the stepping motor generates a second magnetic flux opposite to the first magnetic flux, a third pulse with which the first coil generates the second magnetic flux, and a fourth pulse with which the second coil generates the first magnetic flux, to the stepping motor. The driving circuit supplies the second pulse, the third pulse, and the fourth pulse in this order to the stepping motor in a state of being stopped to start the stepping motor, and supplies the first pulse, the second pulse, the third pulse, and the fourth pulse in this order to the stepping motor after starting to continuously drive the stepping motor.
    Type: Application
    Filed: February 26, 2020
    Publication date: October 1, 2020
    Inventors: Tetsuya NOBE, Satoshi SAKAI, Kazumi SAKUMOTO, Kosuke YAMAMOTO, Akihito OKUMURA
  • Patent number: 10712966
    Abstract: A storage control device includes a processor configured to receive access information indicating a start position and an end position of an access area in a first volume. The processor is configured to determine, based on one or more pieces of the received access information, whether a number of blocks in a cache area is reduced as a whole by changing a position of data in the first volume. The blocks are used in response to an access to the access area and correspond to one or more unit areas in the first volume. The one or more unit areas include the access area. The processor is configured to change the position of the data in the first volume upon determining that the number of the blocks in the cache area is reduced as a whole by changing the position of the data in the first volume.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: July 14, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Keima Abe, Takuro Kumabe, Akihito Kobayashi, Motohiro Sakai
  • Patent number: 10707075
    Abstract: A semiconductor wafer includes a silicon carbide substrate having a first carrier concentration, a carrier concentration transition layer, and an epitaxial layer provided on the carrier concentration transition layer, the epitaxial layer having a second carrier concentration, and the second carrier concentration being lower than the first carrier concentration. The carrier concentration transition layer has a concentration gradient in the thickness direction. The carrier concentration decreases as the film thickness increases from an interface between a layer directly below the carrier concentration transition layer and the carrier concentration transition layer, and the carrier concentration decreases at a lower rate of decrease as the film thickness of the carrier concentration transition layer increases.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: July 7, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenichi Hamano, Akihito Ohno, Takuma Mizobe, Masashi Sakai, Yasuhiro Kimura, Yoichiro Mitani, Takashi Kanazawa
  • Publication number: 20200197974
    Abstract: A controller controls a plunger to operate at a measurement speed and discharge the viscous material from the nozzle before applying the viscous material to the workpiece. The controller measures a period of time, from when the plunger starts operating at the measurement speed until a discharge amount of the viscous material reaches a predetermined value, as a time delay amount. The controller further determines an operation speed of the plunger and/or a moving speed of the nozzle during application of the viscous material to the workpiece according to the measured time delay amount.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 25, 2020
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Naohiro Otsuki, Toshihiko Ito, Akihito Sakai
  • Publication number: 20200144053
    Abstract: A semiconductor wafer includes a silicon carbide substrate having a first carrier concentration, a carrier concentration transition layer, and an epitaxial layer provided on the carrier concentration transition layer, the epitaxial layer having a second carrier concentration, and the second carrier concentration being lower than the first carrier concentration. The carrier concentration transition layer has a concentration gradient in the thickness direction. The carrier concentration decreases as the film thickness increases from an interface between a layer directly below the carrier concentration transition layer and the carrier concentration transition layer, and the carrier concentration decreases at a lower rate of decrease as the film thickness of the carrier concentration transition layer increases.
    Type: Application
    Filed: November 28, 2016
    Publication date: May 7, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenichi HAMANO, Akihito OHNO, Takuma MIZOBE, Masashi SAKAI, Yasuhiro KIMURA, Yoichiro MITANI, Takashi KANAZAWA
  • Patent number: 10346070
    Abstract: When an access process has been requested for a storage apparatus, a registration unit determines an access priority of the requested access process and registers an entry corresponding to the requested access process in a queue corresponding to the determined access priority out of a plurality of queues that are each provided for a different access priority. An instruction unit checks the plurality of queues at intermittent check timing, fetches, at each check timing, one entry from each queue, out of the plurality of queues, in which entries are registered, and instructs the storage apparatus to execute access processes corresponding to the fetched entries.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: July 9, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Shinichiro Matsumura, Motohiro Sakai, Takahiro Ohyama, Takuro Kumabe, Akihito Kobayashi
  • Patent number: 10341213
    Abstract: An object of the present invention is to generate a clock also before reception of a packet in a reception device. A reception device has: a storage unit storing a true time-stamp included in a received packet including audio data and the true time-stamp expressing reproduction time of the audio data; a timer counting time; a dummy time-stamp generation unit generating a dummy time-stamp as a false time-stamp; a comparator comparing time based on the true time-stamp stored in the storage unit or the dummy time-stamp and time indicated by the timer; and a clock generation unit generating a clock in accordance with a comparison result of the comparator. The comparator performs comparison using the dummy time-stamp until a predetermined condition is satisfied and, after the predetermined condition is satisfied, performs comparison using the true time-stamp.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: July 2, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Hirofumi Shigehisa, Teruhisa Takeda, Akihito Sakai, Hirohisa Furukawa
  • Publication number: 20180212856
    Abstract: An object of the present invention is to generate a clock also before reception of a packet in a reception device. A reception device has: a storage unit storing a true time-stamp included in a received packet including audio data and the true time-stamp expressing reproduction time of the audio data; a timer counting time; a dummy time-stamp generation unit generating a dummy time-stamp as a false time-stamp; a comparator comparing time based on the true time-stamp stored in the storage unit or the dummy time-stamp and time indicated by the timer; and a clock generation unit generating a clock in accordance with a comparison result of the comparator. The comparator performs comparison using the dummy time-stamp until a predetermined condition is satisfied and, after the predetermined condition is satisfied, performs comparison using the true time-stamp.
    Type: Application
    Filed: December 14, 2017
    Publication date: July 26, 2018
    Applicant: Renesas Electronics Corporation
    Inventors: Hirofumi SHIGEHISA, Teruhisa TAKEDA, Akihito SAKAI, Hirohisa FURUKAWA
  • Publication number: 20160311177
    Abstract: A mold (10) according to the present invention is a mold for molding a surface of a laminate (60) when curing the laminate (60) obtained by laminating prepreg (62). The mold (10) has a planar plate shape and elastically deforms from the planar plate shape into a shape corresponding to a shape of the laminate (60), thereby being capable of coming tight into contact with the laminate (60). Thereby, a mold which is easy to handle can be provided.
    Type: Application
    Filed: July 1, 2016
    Publication date: October 27, 2016
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Toshikazu SANA, Akihito SAKAI, Akira MURAI, Yasuhiro TAKENAKA, Kazuyoshi KAWANO, Tomoya TAKAHASHI
  • Patent number: 9409361
    Abstract: A mold (10) according to the present invention is a mold for molding a surface of a laminate (60) when curing the laminate (60) obtained by laminating prepreg (62). The mold (10) has a planar plate shape and elastically deforms from the planar plate shape into a shape corresponding to a shape of the laminate (60), thereby being capable of coming tight into contact with the laminate (60). Thereby, a mold which is easy to handle can be provided.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: August 9, 2016
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Toshikazu Sana, Akihito Sakai, Akira Murai, Yasuhiro Takenaka, Kazuyoshi Kawano, Tomoya Takahashi
  • Patent number: 8932397
    Abstract: Provided is a near-infrared shielding coating agent containing: (1) an inorganic near-infrared absorbing agent; (2) a tetrafunctional silicon compound represented by general formula Si(OR1)4, a hydrolysate thereof, and/or a condensation polymerization product thereof; (3) a trifunctional silicon compound represented by general formula R2Si(OR3)3, a hydrolysate thereof, and/or a condensation polymerization product thereof; (4) a silane coupling agent represented by one of the general formulas Si(X)3—Y or R4Si(X)2—Y, a hydrolysate thereof, and/or a condensation polymerization product thereof; and (5) a solvent. This coating agent allows the formation, at an ordinary temperature between 5° C. and 40° C., of a near-infrared shielding film that has a high film hardness and is not prone to cracks.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: January 13, 2015
    Assignee: Ishihara Sangyo Kaisha. Ltd.
    Inventors: Yoichi Ishibai, Akihito Sakai, Takashi Nishikawa, Kenji Kataoka, Kiyoyuki Hotta, Hideyo Ando, Yuzo Fukuda, Yorisuke Kondo, Kazuya Suzuki
  • Publication number: 20140008009
    Abstract: A mold (10) according to the present invention is a mold for molding a surface of a laminate (60) when curing the laminate (60) obtained by laminating prepreg (62). The mold (10) has a planar plate shape and elastically deforms from the planar plate shape into a shape corresponding to a shape of the laminate (60), thereby being capable of coming tight into contact with the laminate (60). Thereby, a mold which is easy to handle can be provided.
    Type: Application
    Filed: December 26, 2011
    Publication date: January 9, 2014
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Toshikazu Sana, Akihito Sakai, Akiro Murai, Yasuhiro Takenaka, Kazuyoshi Kawano, Tomoya Takahashi
  • Publication number: 20120168649
    Abstract: Provided is a near-infrared shielding coating agent containing: (1) an inorganic near-infrared absorbing agent; (2) a tetrafunctional silicon compound represented by general formula Si(OR1)4, a hydrolysate thereof, and/or a condensation polymerization product thereof; (3) a trifunctional silicon compound represented by general formula R2Si(OR3)3, a hydrolysate thereof, and/or a condensation polymerization product thereof; (4) a silane coupling agent represented by one of the general formulas Si(X)3-Y or R4Si(X)2-Y, a hydrolysate thereof, and/or a condensation polymerization product thereof; and (5) a solvent. This coating agent allows the formation, at an ordinary temperature between 5° C. and 40° C., of a near-infrared shielding film that has a high film hardness and is not prone to cracks.
    Type: Application
    Filed: June 9, 2010
    Publication date: July 5, 2012
    Inventors: Yoichi Ishibai, Akihito Sakai, Takashi Nishikawa, Kenji Kataoka, Kiyoyuki Hotta, Hideyo Ando, Yuzo Fukuda, Yorisuke Kondo, Kazuya Suzuki
  • Publication number: 20100159189
    Abstract: The base fabric for an airbag of the present invention comprises a fibrous laminate in which plural fibrous bodies configured by fibers that are oriented in one direction are laminated, and an oriented direction of the fibers in one fibrous body out of two fibrous bodies that are adjacently laminated is different from an oriented direction of the fibers in the other fibrous body. The airbag of the present invention comprises the base fabric for an airbag and is obtained by a method including joining step for joining the plural base fabrics for an airbag so that an internal space having a predetermined shape is formed and cutting step for cutting along a joint section formed by the joining step.
    Type: Application
    Filed: October 30, 2009
    Publication date: June 24, 2010
    Applicants: TOYOTA BOSHOKU KABUSHIKI KAISHA, FUKUI FIBERTECH CO., LTD.
    Inventors: Natsuhiko TAKAGI, Akihito SAKAI, Hiromasa MORI, Satoshi KAWAZOE, Takahiro ITO
  • Patent number: 6460374
    Abstract: A glass-impregnated, fiber-reinforced ceramic comprises a ceramic matrix having open voids, inorganic fibers embedded in the ceramic matrix in a regular or irregular orientation, and a glass matrix filling up the open voids in the ceramic matrix. The glass-impregnated, fiber-reinforced ceramic is manufactured by a manufacturing method comprising the steps of forming a fiber-reinforced ceramic comprising the ceramic matrix having open voids, and inorganic fibers embedded in the ceramic matrix, impregnating the fiber-reinforced ceramic with a glass precursor solution containing a glass precursor to stop up the open voids of the ceramic matrix with the glass precursor solution, and subjecting the fiber-reinforced ceramic impregnated with the solution to a heat treatment.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: October 8, 2002
    Assignees: Kawasaki Jukogyo Kabushiki Kaisha, Ube Industries, Ltd.
    Inventors: Akihito Sakai, Jun Gotoh, Keiichi Tsugeki, Masaki Shibuya, Yasuhiro Shioji
  • Publication number: 20010037659
    Abstract: A glass-impregnated, fiber-reinforced ceramic comprises a ceramic matrix having open voids, inorganic fibers embedded in the ceramic matrix in a regular or irregular orientation, and a glass matrix filling up the open voids in the ceramic matrix. The glass-impregnated, fiber-reinforced ceramic is manufactured by a manufacturing method comprising the steps of forming a fiber-reinforced ceramic comprising the ceramic matrix having open voids, and inorganic fibers embedded in the ceramic matrix, impregnating the fiber-reinforced ceramic with a glass precursor solution containing a glass precursor to stop up the open voids of the ceramic matrix with the glass precursor solution, and subjecting the fiber-reinforced ceramic impregnated with the solution to a heat treatment.
    Type: Application
    Filed: November 30, 1999
    Publication date: November 8, 2001
    Inventors: AKIHITO SAKAI, JUN GOTOH, KEIICHI TSUGEKI, MASAKI SHIBUYA, YASUHIRO SHIOJI
  • Patent number: 6103303
    Abstract: Dendrite or asteroidal titanium dioxide micro-particles having a length of 0.2 to 0.5 .mu.m, a thickness of 0.05 to 0.1 .mu.m, and a specific surface area of 20 to 130 m.sup.2 /gram, are produced by treating hydrated titanium oxide particles with an alkali, mixing instantaneously the resulting reaction product with an amount of hydrochloric acid in a ratio of 1 to 4 mols of hydrochloric acid to one mol of the titanium oxide in the reaction product to effect a reaction, then aging under heat at 85.degree. C. or higher, and then drying or, if necessary, firing after the drying, and subsequently may be coated with at least one from oxides and hydrated oxides of elements selected from aluminum, silicon, titanium, zirconium, tin and antimony to improve the dispersibility and resistance to light of the particles, or may be coated with tin oxide containing antimony or indium oxide containing tin to make the particles electroconductive.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: August 15, 2000
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Hideo Takahashi, Akihito Sakai, Masakazu Hattori
  • Patent number: 6071603
    Abstract: A glass-impregnated, fiber-reinforced ceramic comprises a ceramic matrix having open voids, inorganic fibers embedded in the ceramic matrix in a regular or irregular orientation, and a glass matrix filling up the open voids in the ceramic matrix. The glass-impregnated, fiber-reinforced ceramic is manufactured by a manufacturing method comprising the steps of forming a fiber-reinforced ceramic comprising the ceramic matrix having open voids, and inorganic fibers embedded in the ceramic matrix, impregnating the fiber-reinforced ceramic with a glass precursor solution containing a glass precursor to stop up the open voids of the ceramic matrix with the glass precursor solution, and subjecting the fiber-reinforced ceramic impregnated with the solution to a heat treatment.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: June 6, 2000
    Assignees: Kawasaki Jukogyo Kaushiki Kaisha, Ube Industries, Ltd.
    Inventors: Akihito Sakai, Jun Gotoh, Keiichi Tsugeki, Masaki Shibuya, Yasuhiro Shioji
  • Patent number: 5837050
    Abstract: Ultrafine iron-containing rutile type titanium dioxide particles useful for UV shielding cosmetics, pharmaceutical compositions and UV shielding paints are disclosed. They are rutile type crystalline titanium dioxide particles having an average single particle size of 0.01 to 0.1 .mu.m and containing an iron component at a concentration of 1 to 15% by weight as expressed as Fe based on the titanium dioxide in the crystalline structure. They can be produced by using a fine titania sol comprising rutile crystallites as basic particles, precipitating iron oxide or hydrated iron oxide onto the surfaces of the titania particles to effect coating, then firing and grinding.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: November 17, 1998
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Haruo Okuda, Hideo Futamata, Akihito Sakai, Masakazu Hattori
  • Patent number: 5714260
    Abstract: Ultrafine iron-containing rutile type titanium dioxide particles useful for UV shielding cosmetics, pharmaceutical compositions and UV shielding paints are disclosed. They are rutile type crystalline titanium dioxide particles having an average single particle size of 0.01 to 0.1 .mu.m and containing an iron component at a concentration of 1 to 15% by weight as expressed as Fe based on the titanium dioxide in the crystalline structure. They can be produced by using a fine titania sol comprising rutile crystallites as basic particles, precipitating iron oxide or hydrated iron oxide onto the surfaces of the titania particles to effect coating, then firing and grinding.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: February 3, 1998
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Haruo Okuda, Hideo Futamata, Akihito Sakai, Masakazu Hattori