Patents by Inventor Akira Hirakawa
Akira Hirakawa 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).
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Patent number: 11820488Abstract: To provide an aircraft of which flight efficiency can be improved. An image capturing method according to this embodiment is a method for capturing an image of an object to be photographed by using a plurality of aircrafts including an image capturing part. The image capturing method includes a ranking step of setting up a predetermined ranking for each of the aircrafts, a control step of performing control on the basis of the ranking, and an image capturing step of moving the aircraft and using the image capturing part to capture an image of the object. According to this configuration, a plurality of aircrafts can be used to capture images of a plurality of objects to be photographed simultaneously from different angles.Type: GrantFiled: January 30, 2020Date of Patent: November 21, 2023Assignee: REDDOTDRONEJAPAN CO., LTD.Inventors: Akira Hirakawa, Nozomu Miura
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Publication number: 20210107627Abstract: To provide an aircraft of which flight efficiency can be improved. An image capturing method according to this embodiment is a method for capturing an image of an object to be photographed by using a plurality of aircrafts including an image capturing part. The image capturing method includes a ranking step of setting up a predetermined ranking for each of the aircrafts, a control step of performing control on the basis of the ranking, and an image capturing step of moving the aircraft and using the image capturing part to capture an image of the object. According to this configuration, a plurality of aircrafts can be used to capture images of a plurality of objects to be photographed simultaneously from different angles.Type: ApplicationFiled: January 30, 2020Publication date: April 15, 2021Inventors: Akira HIRAKAWA, Nozomu MIURA
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Publication number: 20090073656Abstract: A heat sink has a structure which enables the heat sink to be carried by a holding device in an automated production line. The heat sink includes a base portion at a center thereof and a finned portion around the base portion. The heat sink is arranged in contact with, or very close to, an object to be cooled, e.g., an MPU, and receives the heat generated in the object. The heat is then dissipated to ambient air from the fins. At an object-side end of the heat sink is provided a convex portion which has an engagement feature to be caught by the holding device while the heat sink is carried.Type: ApplicationFiled: December 20, 2007Publication date: March 19, 2009Applicant: NIDEC CORPORATIONInventors: Takaya OTSUKI, Takamasa YAMASHITA, Tatsuya AKASE, Akira HIRAKAWA
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Publication number: 20080223558Abstract: A cooling device includes a fan, a heat sink, and an attaching portion arranged to attach the fan to the heat sink. The fan includes an impeller rotating about a center axis, a motor arranged to rotate the impeller, and a base portion supporting the motor. The attaching portion includes a frame surrounding a portion of the impeller opposed to the heat sink, a plurality of supports projecting from the frame to a side opposite to the heat sink, and a plurality of supporting ribs connecting the supports and the base portion to each other, arranged about the center axis, and extending from the base portion away from the center axis. Each supporting rib has a first primary surface and a second primary surface arranged opposite to the impeller. The first and second primary surfaces are inclined with respect to a plane substantially perpendicular to the center axis.Type: ApplicationFiled: March 12, 2008Publication date: September 18, 2008Applicant: NIDEC CORPORATIONInventors: Takaya OTSUKI, Kazuhiro INOUCHI, Takamasa YAMASHITA, Makoto FUJIHARA, Yoshinori INOUE, Naoto YAMAOKA, Tatsuya AKASE, Akira HIRAKAWA
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Publication number: 20080223551Abstract: In a manufacturing method of a fin unit for a heat sink for dissipating a heat from a heat source, the fin unit includes a plurality of fins radially arranged about its center axis, and a fin supporting portion connecting inner ends of the fins and supporting the fins. First, metal is heated. The heated metal is extruded and/or drawn through a die to obtain a metal body. One of the die and the metal body obtained through the die is rotated relative to the other about a center axis of a die hole of the die. The metal body is then cut, thereby obtaining the fin unit.Type: ApplicationFiled: March 12, 2008Publication date: September 18, 2008Applicant: NIDEC CORPORATIONInventors: Takaya OTSUKI, Kazuhiro INOUCHI, Takamasa YAMASHITA, Makoto FUJIHARA, Yoshinori INOUE, Naoto YAMAOKA, Tatsuya AKASE, Akira HIRAKAWA
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Patent number: 6908703Abstract: A sealed battery has an outer can having an opening and functioning as an electrode terminal, a sealing member fitted in the opening of the outer can and functioning as an electrode terminal which is different in polarity from the outer can, and a spiral-wound electrode assembly contained in the outer can. The spiral-wound electrode assembly includes a positive electrode, a negative electrode and a separator wound together spirally, in which the electrodes are separated by the separator and the outermost coil of the separator forms the outer circumferential face of the spiral-wound electrode assembly. A substrate included in the positive or negative electrode which is adjacent to the outermost coil of the separator has an exposed portion, which projects in the axial direction of the spiral-wound electrode assembly beyond the outermost coil of the separator and is in direct contact with the inner face of the outer can.Type: GrantFiled: August 28, 2002Date of Patent: June 21, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Masayuki Saito, Akira Hirakawa, Yasuhisa Yamada
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Patent number: 6534215Abstract: The present invention discloses a sintered cadmium negative electrode for use in an alkaline storage battery having a porous sintered nickel substrate and an active material containing cadmium hydroxide, the active material impregnated in the porous sintered nickel substrate, sintered cadmium negative electrode in which a groove 3 having a depth of 0.1 to 20 &mgr;m is provided on a surface of the substrate so that a projected region and a depressed region are formed on the surface of the substrate. An alkaline storage battery employing the sintered cadmium negative electrode of the invention achieves, as well as a high capacity, an improved large current charge-discharge characteristic by increasing an oxygen gas absorbing performance.Type: GrantFiled: March 10, 2000Date of Patent: March 18, 2003Assignee: Sanyo Electric Co., Ltd.Inventors: Yoshitaka Shinyashiki, Akira Hirakawa, Masahiro Hosoda
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Publication number: 20030049523Abstract: A sealed battery has an outer can having an opening and functioning also as an electrode terminal, a sealing member fitted in the opening of the outer can and functioning also as an electrode terminal which is different in polarity from the outer can, and a spiral-wound electrode assembly contained in the outer can. The spiral-wound electrode assembly includes a positive electrode, a negative electrode and a separator wound together spirally, in which the positive electrode and the negative electrode are separated by the separator and the outermost coil of the separator forms the outer circumferential face of the spiral-wound electrode assembly. A substrate included in the positive or negative electrode which is adjacent to the outermost coil of the separator has an exposed portion. The exposed portion projects in the axial direction of the spiral-wound electrode assembly beyond the outermost coil of the separator and is in direct contact with the inner face of the outer can.Type: ApplicationFiled: August 28, 2002Publication date: March 13, 2003Applicant: SANYO ELECTRIC CO., LTD.Inventors: Masayuki Saito, Akira Hirakawa, Yasuhisa Yamada
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Patent number: 5757409Abstract: Selective pattern exposure with high reliability is made possible by a desired pattern of repeated pattern and a non-repeated pattern. Exposure technology is obtained to enable improvement of preparation efficiency of pattern data and to secure inspection of an aperture pattern. With the invention, an electron beam is used as focused beam, and a pattern exposure apparatus of a batch transfer system for transferring repeated pattern and non-repeated pattern of plural graphics of a semiconductor integrated circuit or the like comprises an EB drawing section for controlling the beam and irradiating beam onto a sample, a control I/O section, a drawing control section and a data storage section. In the EB drawing section, a semiconductor wafer is mounted on a platform, and in the path of the electron beam from the electron beam source to the stage, a first mask, a blanking electrode, an electron lens, a first deflector, a second deflector, a second mask and a third deflector are installed.Type: GrantFiled: May 10, 1996Date of Patent: May 26, 1998Assignee: Hitachi, Ltd.Inventors: Yoshihiko Okamoto, Haruo Yoda, Ikuo Takada, Yukinobu Shibata, Akira Hirakawa, Norio Saitou, Shinji Okazaki, Fumio Murai
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Patent number: 5557314Abstract: Selective pattern exposure with high reliability is made possible by a desired pattern of repeated pattern and a non-repeated pattern. Exposure technology is obtained to enable improvement of preparation efficiency of pattern data and to secure inspection of an aperture pattern. With the invention, an electron beam is used as focused beam, and a pattern exposure apparatus of a batch transfer system for transferring repeated pattern and non-repeated pattern of plural graphics of a semiconductor integrated circuit or the like comprises an EB drawing section for controlling the beam and irradiating beam onto a sample, a control I/O section, a drawing control section and a data storage section. In the EB drawing section, a semiconductor wafer is mounted on a platform, and in the path of the electron beam from the electron beam source to the stage, a first mask, a blanking electrode, an electron lens, a first deflector, a second deflector, a second mask and a third deflector are installed.Type: GrantFiled: June 16, 1993Date of Patent: September 17, 1996Assignee: Hitachi, Ltd.Inventors: Yoshihiko Okamoto, Haruo Yoda, Ikuo Takada, Yukinobu Shibata, Akira Hirakawa, Norio Saitou, Shinji Okazaki, Fumio Murai
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Electron beam lithography method and apparatus separating repetitive and non-repetitive pattern data
Patent number: 5371373Abstract: Not only for a memory device having a high repeatabitlity but also for a device having a low repeatability, there can be realized an electron beam lithography method which can carry out high speed processing of the device with a less number of lithography shots as well as an apparatus therefor. An input pattern is classified into repetitive and non-repetitive patterns. The classified non-repetitive pattern is further classified into unit areas, i.e., repetitive and no-repetitive unit patterns. Next, the non-repetitive unit patterns are converted into lithography data, while the repetitive unit patterns and repetitive patterns are composed on the lithography data of the non-repetitive unit patterns. A result of composing the repetitive unit patterns and repetitive patterns and the lithography data of the non-repetitive unit patterns is sorted according to a lithography sequence and output as the lithography data.Type: GrantFiled: November 16, 1993Date of Patent: December 6, 1994Assignee: Hitachi, Ltd.Inventors: Yukinobu Shibata, Akira Hirakawa -
Patent number: 5281495Abstract: Disclosed is a rechargeable alkaline storage cell having a negative electrode, a positive electrode, and a separator disposed between the electrodes. The negative electrode has an active material layer and a conductive layer formed on the active layer, the active layer including cadmium active material, the conductive layer including polyvinylpyrrolidone as a binder and conductive powder.Type: GrantFiled: February 26, 1993Date of Patent: January 25, 1994Assignee: Sanyo Electric Co., Ltd.Inventors: Akira Hirakawa, Hironori Honda, Toshihiro Inoue, Yutaka Doi, Yoshiyuki Fujimoto, Toshiaki Shiojiri, Ryuuji Kawase
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Patent number: 5208122Abstract: The present invention discloses an enclosed alkaline storage cell. The enclosed alkaline storage cell comprising a negative electrode made of materials including a main active material of cadmium oxide, a positive electrode, and a separator impregnated with an alkaline electrolytic solution and interposed therebetween, characterized in that the negative electrode has a product produced by cross linking reaction between high polymers having hydroxyl group and at least one of boric acid and boric acid salt inside and/or on the surface thereof.Type: GrantFiled: March 24, 1992Date of Patent: May 4, 1993Assignee: Sanyo Electric Co., Ltd.Inventors: Akira Hirakawa, Takahisa Awajitani, Hironori Honda
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Patent number: 5206517Abstract: An electron beam lithographic method in which a sample is irradiated with an electron beam, wherein an extreme point of a contour of a pattern is calculated and a lithographic area is divided into a first region that is surrounded by straight lines drawn from the extreme point in parallel with the x-axis and the y-axis of the sample and by said pattern, and second regions in order to be lithographed.Type: GrantFiled: November 27, 1991Date of Patent: April 27, 1993Assignees: Hitachi, Ltd., Hitachi Instrument Engineering Co., Ltd.Inventors: Yukinobu Shibata, Ikuo Takada, Akira Hirakawa, Tadao Konishi
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Patent number: D573110Type: GrantFiled: July 27, 2007Date of Patent: July 15, 2008Assignee: Nidec CorporationInventors: Takaya Otsuki, Takamasa Yamashita, Akira Hirakawa
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Patent number: D593042Type: GrantFiled: July 29, 2008Date of Patent: May 26, 2009Assignee: Nidec CorporationInventors: Takamasa Yamashita, Takaya Otsuki, Akira Hirakawa, Tatsuya Akase
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Patent number: D600218Type: GrantFiled: December 20, 2007Date of Patent: September 15, 2009Assignee: Nidec CorporationInventors: Takaya Otsuki, Takamasa Yamashita, Akira Hirakawa
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Patent number: D615503Type: GrantFiled: July 16, 2009Date of Patent: May 11, 2010Assignee: Nidec CorporationInventors: Takaya Otsuki, Takamasa Yamashita, Akira Hirakawa