Patents by Inventor Masayuki Ogura

Masayuki Ogura 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: 20200212414
    Abstract: An electric device capable of suppressing the short circuit between adjacent terminals is provided. The electric device includes a battery pack in which a plurality of battery-side terminals are provided and a device body in which device-side terminals are provided and to which the battery pack is detachably attached. One of the battery-side terminals and the device-side terminals are plate terminals protruding from a terminal holder, and the other of the battery-side terminals and the device-side terminals are connection terminals which protrude into slots in which the plate terminals are inserted and come into contact with the plate terminals. An insulating portion extending from the terminal holder toward a tip of the plate terminal and inserted into the slot is provided to at least one of the plate terminals.
    Type: Application
    Filed: July 27, 2018
    Publication date: July 2, 2020
    Inventors: Shota TAKEUCHI, Takuya TERANISHI, Masayuki OGURA, Yusuke FUNABIKI, Junichi TOUKAIRIN
  • Publication number: 20200180044
    Abstract: The electrical device comprises a common device main body having selectively and detachably attached thereto either a variable-voltage power supply device or a high-voltage power supply device. The device main body has: a protruding section that abuts a power supply-side main erroneous attachment prevention section provided in the variable-voltage power supply device and the high-voltage power supply device; a device-side main erroneous attachment prevention section that abuts the power supply-side main erroneous attachment prevention section provided in a low-voltage power supply device and prevents the low-voltage power supply device from abutting an attachment positioning section; and a device-side attachment pet' lifting section that can be combined in a power supply-side auxiliary erroneous attachment prevention section provided in the high-voltage power supply device.
    Type: Application
    Filed: July 27, 2018
    Publication date: June 11, 2020
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yusuke FUNABIKI, Tomomasa NISHIKAWA, Takuya Teranishi, Masayuki Ogura
  • Publication number: 20200161609
    Abstract: The electrical apparatus, in which a series connection state and a parallel connection state of an upper cell unit including five battery cells and a lower cell unit can be automatically switched by means of a difference in a terminal shape on the electrical apparatus body side, has a terminal holder and holds apparatus side terminals. The terminal holder, which establishes an electrically connected state with the connection terminals of the battery pack, is provided with two parallel protruding parts that extend in the forward-backward direction, and second rail grooves fitted to the protruding parts on the electrical apparatus side. Due to the fitting, relative movement of the terminal holder and the battery pack in the vertical direction can be suppressed, and wear on the apparatus side terminals can be greatly suppressed.
    Type: Application
    Filed: June 29, 2018
    Publication date: May 21, 2020
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Takuhiro Murakami, Tomomasa NISHIKAWA, Shinji Watanabe, Junpei SATO, Hikaru Tamura, Shota KANNO, Toshio Mizoguchi, Yasushi Nakano, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Masayuki Ogura, Takuya Teranishi, Junichi Toukairin, Shota Takeuchi, Yusuke FUNABIKI
  • Publication number: 20190259984
    Abstract: A battery pack houses first and second cell units that are composed of a plurality of cells, and has a positive electrode power source terminal and a negative electrode power source terminal. This battery pack is provided with a series connector capable of connecting, in series, the first and second cell units and a parallel connector capable of connecting, in parallel, the first and second cell units, and is capable of switching between a parallel connection voltage and a series connection voltage. In the case of attachment to the high voltage electrical device body, the series connector becomes conductive and the parallel connector pair is cut off by the action of the series/parallel switching terminal. In the case of attachment to a low voltage electrical device body, the state is returned to an initial state, the series connector is cut off, and the parallel connector pair becomes conductive.
    Type: Application
    Filed: October 27, 2017
    Publication date: August 22, 2019
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Tomomasa NISHIKAWA, Takuya Teranishi, Naoto Wakatabe, Akira Matsushita, Masaru Hirano, Osamu Kawanobe, Nobuhiro TAKANO, Shinji Watanabe, Hiroyuki HANAWA, Takuhiro Murakami, SHOTA KANNO, Junpei Sato, Hikaru Tamura, Hayato Yamaguchi, Toshio Mizoguchi, Yasushi Nakano, Kazuhiko FUNABASHI, Masayuki Ogura, Yusuke FUNABIKI, Junichi Toukairin, Shota Takeuchi
  • Publication number: 20190260209
    Abstract: In order that the output voltage of a battery pack can be switched and the battery pack can be shared among different voltage electric appliances, this battery pack has a switching mechanism that switches outputting a low voltage by parallel connection of two cell units or outputting a high voltage by series connection of the two cell units, said two cell units each being composed of a plurality of cells connected in series, wherein the switching mechanism is configured from a change-over switch having an operation lever (452). The change-over switch is embedded in a battery pack (400), and an operator is able to manually switch outputting 18 V by setting the operation lever (452) at a first position or outputting 36 V by setting the operation lever (452) at a second position.
    Type: Application
    Filed: October 27, 2017
    Publication date: August 22, 2019
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Tomomasa NISHIKAWA, Masayuki OGURA, Masaru HIRANO, Takuhiro MURAKAMI, Nobuhiro TAKANO, Osamu KAWANOBE, Akira MATSUSHITA, Hayato YAMAGUCHI
  • Publication number: 20190259985
    Abstract: In an upper cell unit (2146) and a lower cell unit (2147) comprising five battery cells, positive electrode terminals (2162, 2172) are set apart and aligned vertically, and negative electrode terminals (2167, 2177) are set apart and aligned vertically. When an electrical device body is rated at 36V, device-side terminals are in contact only at the upper terminals (2162, 2167), and short circuiting of the lower terminals (2172, 2177) is effected using a short bar 2059. When the electrical device body is rated at 18V, the upper and lower terminals (2162 and 2172, 2167 and 2177) are simultaneously made to contact the device-side terminals, and the upper cell unit (2146) and the lower cell unit (2147) assume a parallel connected state. Thus, it is possible to automatically switch the output voltage when a battery pack is mounted according to the difference in terminal shape on the electrical device body side.
    Type: Application
    Filed: October 27, 2017
    Publication date: August 22, 2019
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Hiroyuki HANAWA, Tomomasa NISHIKAWA, SHOTA KANNO, Toshio Mizoguchi, Yasushi Nakano, Kazuhiko FUNABASHI, Takuya Teranishi, Naoto Wakatabe, Shinji Watanabe, Junpei Sato, Hikaru Tamura, Nobuhiro TAKANO, Osamu Kawanobe, Hayato Yamaguchi, Akira Matsushita, Masaru Hirano, Takuhiro Murakami, Masayuki Ogura, Yusuke Funabiki, Junichi Toukairin, Shota Takeuchi
  • Patent number: 9345156
    Abstract: A power supply device includes a main body, a cover member, a rechargeable battery, and an inverter device. The main body is configured of box-shape formed with an opening. The cover member is configured to open and close the opening. The rechargeable battery is accommodated in the main body. The inverter device is configured to be accommodated in the main body. The inverter device converts a direct voltage from the battery to an alternating voltage and outputs the alternating voltage.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: May 17, 2016
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Masayuki Ogura, Shinji Watanabe, Haruhisa Fujisawa, Kazuhiko Funabashi, Takuhiro Murakami, Yasushi Nakano, Hideki Watanabe, Norihide Tao, Takafumi Itoh
  • Publication number: 20140153171
    Abstract: A power supply device includes a main body, a cover member, a rechargeable battery, and an inverter device. The main body is configured of box-shape formed with an opening. The cover member is configured to open and close the opening. The rechargeable battery is accommodated in the main body. The inverter device is configured to be accommodated in the main body. The inverter device converts a direct voltage from the battery to an alternating voltage and outputs the alternating voltage.
    Type: Application
    Filed: August 17, 2012
    Publication date: June 5, 2014
    Applicant: Hitachi Koki Co., Ltd.
    Inventors: Masayuki Ogura, Shinji Watanabe, Haruhisa Fujisawa, Kazuhiko Funabashi, Takuhiro Murakami, Yasushi Nakano, Hideki Watanabe, Norihide Tao, Takafumi Itoh
  • Publication number: 20130126202
    Abstract: An screw tightening tool (1) includes: a handle part (22) to be held by a user; a trigger (25); a power supplying section (6, 7) that supplies an electrical power in accordance with an operated amount of the trigger; and a motor (3) that rotates in accordance with the electrical power supplied from the power supplying section. The power supplying section supplies the motor with a preventing electrical power for preventing the motor from rotating with respect to the handle part when a predetermined condition is satisfied.
    Type: Application
    Filed: August 1, 2011
    Publication date: May 23, 2013
    Applicant: Hitachi Koki Co., Ltd.
    Inventors: Katsuhiro Oomori, Mizuho Nakamura, Yutaka Ito, Tomomasa Nishikawa, Hironori Mashiko, Atsushi Sumi, Takeshi takeda, Masayuki Ogura
  • Publication number: 20130051104
    Abstract: A battery adapter includes an inverter device capable of converting voltage waveform from DC to AC. A first reachable battery and a second rechargeable battery different in shape can be selectively connected to the inverter device. The first rechargeable battery may, for example, a battery pack for use in an electric power tool, and the second rechargeable battery may, for example, a high-capacity lead-acid battery. With the battery adapter, two types of rechargeable batteries can be used as a power source for driving the AC-driven electric power tool. The battery adapter contains therein a microcomputer with which charge/discharge control is implemented.
    Type: Application
    Filed: August 22, 2012
    Publication date: February 28, 2013
    Applicant: Hitachi Koki Co., Ltd.
    Inventors: Yasushi Nakano, Yukihiro Shima, Kazuhiko Funabashi, Nobuhiro Takano, Yoshikazu Kawano, Masayuki Ogura, Shinji Watanabe, Haruhisa Fujisawa
  • Publication number: 20110253402
    Abstract: A compact battery pack with high handling ability and restraining degradation of battery cells. The battery pack includes an insertion portion to be inserted into a handle portion of a cordless power tool and an accommodation portion in which all battery cells are accommodatable. A protection board with a protection circuit that protects batteries against overcharge and over-discharge is installed in the insertion portion. A switching element is connected between the battery cells and a drive motor of the power tool. An air passage in communication with the battery pack is formed within the handle and a main housing of the cordless power tool. The switching element is positioned at the air passage.
    Type: Application
    Filed: June 27, 2011
    Publication date: October 20, 2011
    Inventors: Takao ARADACHI, Nobuhiro TAKANO, Tomomasa NISHIKAWA, Hiroyuki HANAWA, Masayuki OGURA, Kazuhiko FUNABASHI
  • Patent number: 7969116
    Abstract: A compact battery pack with high handling ability and restraining degradation of battery cells. The battery pack includes an insertion portion to be inserted into a handle portion of a cordless power tool and an accommodation portion in which all battery cells are accommodatable. A protection board with a protection circuit that protects batteries against overcharge and over-discharge is installed in the insertion portion. A switching element is connected between the battery cells and a drive motor of the power tool. An air passage in communication with the battery pack is formed within the handle and a main housing of the cordless power tool. The switching element is positioned at the air passage.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: June 28, 2011
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Takao Aradachi, Nobuhiro Takano, Tomomasa Nishikawa, Hiroyuki Hanawa, Masayuki Ogura, Kazuhiko Funabashi
  • Patent number: 7556457
    Abstract: A compact drilling system capable of improving working efficiency. The drilling system includes a drilling machine and a compressor. A control circuit controls performances of a drill motor in the drilling machine and an air compression motor in the compressor based on the detection result of a pressure sensor that detects a pressure within an air tank provided in the compressor. When one of the motors is activated, the other motor is not allowed to be operated and only when the drill motor is activated, compressed air is supplied from the air tank to the drilling machine. An electrical socket is provided in the compressor. A power cord extending from the drilling machine can be connected to the socket.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: July 7, 2009
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Oda, Yukio Terunuma, Masayuki Ogura
  • Patent number: 7521892
    Abstract: A cordless power tool uses a lithium battery as a power source of a motor and is provided with an overcurrent protection circuit. The circuit allows an overcurrent to instantaneously flow at the start-up time of the motor and shuts off an overcurrent which may flow when the motor is brought into a locked state during the use of the power tool.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: April 21, 2009
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Kazuhiko Funabashi, Takao Aradachi, Hiroyuki Hanawa, Masayuki Ogura
  • Patent number: 7446508
    Abstract: A battery charger for charging a lithium-ion battery includes a temperature control unit and a current supplying unit. The temperature control unit controls a temperature of the lithium-ion battery to fall in a predetermined range. The predetermined range is divided into a plurality of sub-divided temperature ranges. The current supplying unit supplies the lithium-ion battery with a temperature-dependent current relation to a sub-divided temperature range in which the temperature of the lithium-ion battery falls.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: November 4, 2008
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Takao Aradachi, Kazuhiko Funabashi, Hiroyuki Hanawa, Masayuki Ogura
  • Patent number: D610420
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: February 23, 2010
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shingo Kosugi, Masayuki Ogura
  • Patent number: D628038
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: November 30, 2010
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Yoshiki Aoki, Shinichi Kakefuda, Masayuki Ogura, Tetsuya Monzen
  • Patent number: D668608
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: October 9, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Takafumi Itoh, Masanori Okada, Hiroyuki Hasegawa, Masayuki Ogura, Takuhiro Murakami
  • Patent number: D715617
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: October 21, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Yoshiki Aoki, Shinichi Kakefuda, Masayuki Ogura, Masanori Okada, Junichi Tokairin
  • Patent number: D761069
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: July 12, 2016
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Yoshiki Aoki, Shinichi Kakefuda, Masayuki Ogura, Masanori Okada, Junichi Tokairin