Patents by Inventor Kazuyuki Sakakibara

Kazuyuki Sakakibara 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: 20190228936
    Abstract: A fuse element comprises a low melting point metal layer, a first high melting point metal layer having a higher melting point than a melting point of the low melting point metal layer, and a restricting portion including a high melting point material having a higher melting point than a melting point of the low melting point metal layer and configured to restrict flow of the low melting point metal or deformation of a layered body constituted by the first high melting point metal layer and the low melting point metal layer.
    Type: Application
    Filed: June 4, 2016
    Publication date: July 25, 2019
    Applicant: DEXERIALS CORPORATION
    Inventors: Yoshihiro YONEDA, Yuji FURUUCHI, Kazuyuki SAKAKIBARA
  • Publication number: 20190066953
    Abstract: A switch device capable of safely opening or short-circuiting an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery is provided. The device includes a conductor connected to an external circuit, and a reaction part including a liquid-soluble material which opens the conductor and the external circuit and which dissolves on contacting a liquid entering the device interior to electrically connect the conductor and the external circuit.
    Type: Application
    Filed: October 5, 2016
    Publication date: February 28, 2019
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
  • Publication number: 20180301302
    Abstract: A switch device capable of safely opening an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery. The device includes a first conductor connected to an external circuit and having a relatively high ionization tendency, and a second conductor arranged close to the first conductor and having a relatively low ionization tendency which is lower than that of the first conductor, a reaction part which electrically corrodes the first conductor is formed by a liquid between the first and second conductors.
    Type: Application
    Filed: October 5, 2016
    Publication date: October 18, 2018
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
  • Publication number: 20180294118
    Abstract: A switch device capable of safely opening or short-circuiting an electrical circuit in response to an abnormality such as wetting with water or liquid leaking from a battery is provided. The device includes first and second conductors connected to an external circuit, and a reaction part including an insulating material which changes state on contact with a liquid, the first and second conductors being electrically connected or disconnected by the insulating material changing state on contact with the liquid.
    Type: Application
    Filed: October 5, 2016
    Publication date: October 11, 2018
    Applicant: DEXERIALS CORPORATION
    Inventors: Yuji FURUUCHI, Yoshihiro YONEDA, Koichi MUKAI, Kazuyuki SAKAKIBARA
  • Patent number: 9893329
    Abstract: An electronic power supply device supplies electric power from a plurality of battery cells to an electronic power equipment and has an inner case for housing the plurality of battery cells and an outer case for housing the inner case. The electronic power supply device is designed to protect the plurality of battery cells from water damage and from an impact in the event that the electronic power supply device is accidentally dropped.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: February 13, 2018
    Assignee: MAKITA CORPORATION
    Inventor: Kazuyuki Sakakibara
  • Patent number: 9768625
    Abstract: A battery pack in one aspect of the present disclosure comprises: a plurality of battery blocks, a plurality of conduction/interruption units, and a control unit. The control unit selects one battery block to be electrically connected to an external device from among the plurality of battery blocks, on the basis of detection results obtained from a state detection unit, and sets the conduction/interruption unit corresponding to the selected battery block to a conducting state.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: September 19, 2017
    Assignee: MAKITA CORPORATION
    Inventor: Kazuyuki Sakakibara
  • Publication number: 20160006005
    Abstract: An electronic power supply device supplies electric power from a plurality of battery cells to an electronic power equipment and has an inner case for housing the plurality of battery cells and an outer case for housing the inner case. The electronic power supply device is designed to protect the plurality of battery cells from water damage and from an impact in the event that the electronic power supply device is accidentally dropped.
    Type: Application
    Filed: June 23, 2015
    Publication date: January 7, 2016
    Inventor: Kazuyuki SAKAKIBARA
  • Publication number: 20160006278
    Abstract: A battery pack in one aspect of the present disclosure comprises: a plurality of battery blocks, a plurality of conduction/interruption units, and a control unit. The control unit selects one battery block to be electrically connected to an external device from among the plurality of battery blocks, on the basis of detection results obtained from a state detection unit, and sets the conduction/interruption unit corresponding to the selected battery block to a conducting state.
    Type: Application
    Filed: June 29, 2015
    Publication date: January 7, 2016
    Inventor: Kazuyuki SAKAKIBARA
  • Patent number: 9112360
    Abstract: A power supply device includes battery interfaces configured to removably receive at least three batteries and a connection circuit configured to electrically connect the at least three batteries to each other. The connection circuit is capable of connecting at least two batteries in parallel and connecting at least one other battery to the at least two parallel-connected batteries in series. According to this power supply device, it is possible to supply high power to an electric device by connecting the batteries in series. In addition, it is possible to supply almost all of the electric power stored in the batteries to the electric device, even if amount of the remaining electric power in each battery is substantially uneven.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: August 18, 2015
    Assignee: MAKITA CORPORATION
    Inventors: Masahiko Goto, Masaaki Fukumoto, Kazuyuki Sakakibara
  • Patent number: 8741467
    Abstract: Cooling air intake port (52), cooling air exhaust port (55), and securing walls (86, 87), which contact and secure the side surfaces of one or more battery cells (72), may be defined within two battery pack housing halves (50, 80). When battery pack (99) is assembled, at least one cooling air passage (91, 92) is defined by the side surfaces of the battery cells, the interior surface of the battery pack housing, and the securing walls. The cooling air passage connects the cooling air intake port to the cooling air exhaust port. By forcing cooling air through the cooling air passage, the battery cells can be effectively and efficiently cooled.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: June 3, 2014
    Assignee: Makita Corporation
    Inventor: Kazuyuki Sakakibara
  • Patent number: 8638065
    Abstract: A battery pack usable as a power source of an electric device, is disclosed, in which battery modules are in series; each battery module is configured to include battery cells in series; a discharge controller controls discharge power which is supplied from the battery modules to the electric device; a modulator modulates a voltage of each module between a high voltage and a low voltage which is higher than zero and lower than the high voltage; the high voltage and the low voltage are set to allow a load device of the electric device to operate by the high voltage, and to allow the load device not to operate by the low voltage; and the discharge controller operates by the battery modules, irrespective of whether each module outputs the high voltage or the low voltage.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: January 28, 2014
    Inventor: Kazuyuki Sakakibara
  • Publication number: 20130293197
    Abstract: A cordless power tool system is provided which is driven by using a battery pack as a power source, and which has work performance equivalent to an AC power tool is driven by using a commercial power source as a power source. The cordless power tool system is configured to include: a battery pack in which DC voltage of battery modules is converted into AC voltage, to thereby output the AC voltage having a level which is comparable to that of the commercial power source; a cordless power tool which is driven by using the battery pack as a power source; an electrical cord adapter which allows power supply from the commercial power source to the battery pack for charging the battery pack; and an electrical cord adapter which allows power supply from the commercial power source to the cordless power tool for driving the cordless power tool.
    Type: Application
    Filed: July 9, 2013
    Publication date: November 7, 2013
    Inventor: Kazuyuki Sakakibara
  • Publication number: 20130230757
    Abstract: Cooling air intake port (52), cooling air exhaust port (55), and securing walls (86, 87), which contact and secure the side surfaces of one or more battery cells (72), may be defined within two battery pack housing halves (50, 80). When battery pack (99) is assembled, at least one cooling air passage (91, 92) is defined by the side surfaces of the battery cells, the interior surface of the battery pack housing, and the securing walls. The cooling air passage connects the cooling air intake port to the cooling air exhaust port. By forcing cooling air through the cooling air passage, the battery cells can be effectively and efficiently cooled.
    Type: Application
    Filed: March 22, 2013
    Publication date: September 5, 2013
    Applicant: Makita Corporation
    Inventor: Kazuyuki Sakakibara
  • Publication number: 20130134787
    Abstract: A battery system is disclosed which includes: a battery assembly; an AC-voltage generator for generating alternate current (AC) voltage from direct current (DC) voltage of the battery assembly; a battery charger for charging the battery assembly; and a detector for detecting application of AC voltage from the AC-voltage generator to the battery charger.
    Type: Application
    Filed: November 29, 2012
    Publication date: May 30, 2013
    Inventor: Kazuyuki Sakakibara
  • Patent number: 8426051
    Abstract: Cooling air intake port (52), cooling air exhaust port (55), and securing walls (86, 87), which contact and secure the side surfaces of one or more battery cells (72), may be defined within two battery pack housing halves (50, 80). When battery pack (99) is assembled, at least one cooling air passage (91, 92) is defined by the side surfaces of the battery cells, the interior surface of the battery pack housing, and the securing walls. The cooling air passage connects the cooling air intake port to the cooling air exhaust port. By forcing cooling air through the cooling air passage, the battery cells can be effectively and efficiently cooled.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: April 23, 2013
    Assignee: Makita Corporation
    Inventor: Kazuyuki Sakakibara
  • Patent number: 8410756
    Abstract: A battery pack is provided with a plurality of battery modules; a pack main body that removably receives the plurality of battery modules; a movable member that prohibits the plurality of battery modules from being attached to and removed from the pack main body at a first position; at least one sensor that detects whether the movable member is located at the first position or not; and a controller that performs at least one predetermined processing based on detection by the at least one sensor.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: April 2, 2013
    Assignee: Makita Corporation
    Inventors: Kazuyuki Sakakibara, Hiroshi Murata, Yutaka Matsunaga, Munetoshi Goto
  • Publication number: 20120205984
    Abstract: A power supply device includes battery interfaces configured to removably receive at least three batteries and a connection circuit configured to electrically connect the at least three batteries to each other. The connection circuit is capable of connecting at least two batteries in parallel and connecting at least one other battery to the at least two parallel-connected batteries in series. According to this power supply device, it is possible to supply high power to an electric device by connecting the batteries in series. In addition, it is possible to supply almost all of the electric power stored in the batteries to the electric device, even if amount of the remaining electric power in each battery is substantially uneven.
    Type: Application
    Filed: September 2, 2010
    Publication date: August 16, 2012
    Applicant: MAKITA CORPORATION
    Inventors: Masahiko Goto, Masaaki Fukumoto, Kazuyuki Sakakibara
  • Patent number: 8222863
    Abstract: A battery pack for an electric device is disclosed which includes: a group of battery cells interconnected in series; discharge control circuitry for converting DC voltage of the group into AC voltage; an AC-output terminal through which an output of the discharge control circuitry is supplied to the device; charge control circuitry for converting AC voltage of a commercial power source into DC voltage, to thereby charge the group; and a charging terminal through which electric power of the source is supplied into the group, wherein the AC-output terminal is connectable with a power-input connector of the device, and the charging terminal is connectable with a charging connector of the source, the pack further comprising a detector for detecting insertion of the power-input connector into the AC-output terminal, wherein the discharge control circuitry initiates a discharge control sequence for the group, if the insertion is detected, and does not initiate the discharge control sequence, in response to non-det
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: July 17, 2012
    Inventor: Kazuyuki Sakakibara
  • Publication number: 20120135284
    Abstract: Cooling air intake port (52), cooling air exhaust port (55), and securing walls (86, 87), which contact and secure the side surfaces of one or more battery cells (72), may be defined within two battery pack housing halves (50, 80). When battery pack (99) is assembled, at least one cooling air passage (91, 92) is defined by the side surfaces of the battery cells, the interior surface of the battery pack housing, and the securing walls. The cooling air passage connects the cooling air intake port to the cooling air exhaust port. By forcing cooling air through the cooling air passage, the battery cells can be effectively and efficiently cooled.
    Type: Application
    Filed: December 15, 2011
    Publication date: May 31, 2012
    Inventor: Kazuyuki Sakakibara
  • Patent number: 8113297
    Abstract: A power tool includes a body, a tool bit, a driving mechanism and a handgrip extending from an end of the handgrip proximal to the body to a grip distal end in a direction that crosses the axial direction of the tool bit. The power tool includes a holding optimization region that is arranged on the handgrip and shaped to match the shape of the user's fingers while the user is holding the handgrip. The holding optimization region at least includes a rearward end surface of a grip distal end region configured such that a normal extending from the rearward end surface crosses the axial direction of the tool bit forward of the handgrip, whereby it is possible to optimize the force of the user's fingers and palm applied to the handgrip.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: February 14, 2012
    Assignee: Makita Corporation
    Inventors: Kazuyuki Sakakibara, Kiyozumi Kokawa