Patents by Inventor Hiroyuki Hanawa

Hiroyuki Hanawa 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: 20150075831
    Abstract: A battery pack includes a case having an upper case part and a lower case part. The battery pack further includes a battery cell accommodated inside the case, and a plurality of electrode terminals electrically connected to the battery cell. The upper case part has an opening which is arranged at a position corresponding to a position of the plurality of electrode terminals and exposes the plurality of electrode terminals. The batter pack additionally includes a suppressing member that suppresses foreign matter from entering inside the case via the opening.
    Type: Application
    Filed: November 21, 2014
    Publication date: March 19, 2015
    Inventors: Hiroyuki Hanawa, Haruhisa Fujisawa, Keita Saitou
  • Patent number: 8895182
    Abstract: According to an aspect of the present invention, there is provided a battery pack to be inserted and attached to a power tool, including: a case; a battery cell accommodated inside the case; and an electrode terminal connected to the battery cell and provided on the case so as to be connectable to a tool-side electrode terminal, wherein the case includes: a case main portion; and a case sub portion which is protruded from the case main portion to be inserted into the power tool, and wherein the electrode terminal is provided on an upper surface of the case main portion at a side of the case sub portion.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: November 25, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Haruhisa Fujisawa, Keita Saitou
  • Publication number: 20140294483
    Abstract: When a battery pack is mounted to a battery attachment part, the battery pack is slid in a horizontal direction (a direction substantially perpendicular to an upper-lower direction) with respect to the housing, e.g., along a long longitudinal direction of a battery-side rail part, such that tool-side rail parts of the battery attachment part are introduced into engaging recess portions of the battery pack. Thereby, the elastic members are fitted and compressed in the battery-side rail parts and the tool-side rail parts, so that the elastic members press upwards the battery-side rail part (e.g., the battery pack) and press downwards the tool-side rail parts (e.g., the housing). That is, the elastic members press the battery pack and the housing such that they come close to each other.
    Type: Application
    Filed: February 18, 2014
    Publication date: October 2, 2014
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Hiroyuki Hanawa, Shota Takeuchi, Yoshihiro Nakano, Itsushi Ogawa, Kousei Yokoyama
  • Patent number: 8765280
    Abstract: A battery pack for use with a battery-driven power tool includes three battery cells in which two out of three are arranged horizontally in parallel to and in alignment with each other in a lower case and the remaining one battery cell is vertically arranged in an upper case. The upper case of the battery pack is inserted, in use, into a battery pack receiving space formed in the grip portion of a power tool. Therefore, the grip portion can be made thin and usability of the power tool is enhanced.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: July 1, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Takashi Ueda, Haruhisa Fujisawa, Junichi Toukairin, Hiroyuki Hanawa, Keita Saitou
  • Patent number: 8684106
    Abstract: A battery pack 10 includes a housing 11, a group of cells 12, a board 13, a plurality of second terminals 14, and a cover 15. An opening 16c is formed in the housing 11. The board 13 has a terminal arranging part 13A. A plurality of the second terminals 14 are arranged on the terminal arranging part 13A of the board 13. The cover 15 has a plate-like shape, and covers an area of the board 13 which is positioned between the terminal arranging part 13A and the opening 16c.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: April 1, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Kousei Yokoyama, Keita Saitou
  • Publication number: 20140001853
    Abstract: A charger includes: a connection portion configured to connect either one of a battery pack and an electric device as an object device, the electric device being configured to generate a power supply related signal related to power supply thereto; a determination unit configured to determine which the battery pack or the electric device is the object device which is connected to the connection portion; and a control unit configured to charge the batter pack through the connection portion when the battery pack is connected to the connection portion, the control unit configured to control power supply to the electric device through the connection portion in accordance with the power supply related signal.
    Type: Application
    Filed: March 23, 2012
    Publication date: January 2, 2014
    Applicant: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Shinji Watanabe, Haruhisa Fujisawa, Kazuhiko Funabashi, Takao Aradachi
  • Patent number: 8579042
    Abstract: A battery device is constituted by connecting such cell assemblies in parallel as each includes: a first cell group having a plurality of cells connected in series; a housing container for housing the first cell group; current detector housed in the container for detecting a current to flow through the first cell group; a switching element connected with the first cell group for turning ON/OFF the current to flow through the first cell group; and a controller for controlling the ON/OFF of the switching element in response to the output signal of the current detector.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: November 12, 2013
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Kiyoshi Kato, Kazuhiko Funabashi, Katsuhiro Oomori
  • Publication number: 20130095350
    Abstract: A battery pack, includes: a battery set including at least one battery cell; a protection IC configured to protect plural kinds of the battery sets, which produce different voltages, from overcharging and overdischarging, the protection IC including terminals for setting the different voltages of the battery sets; and a board configured to mount, on a surface of the board, circuit components including the protection IC and a connection unit which is connected to the terminals based on the produced voltage of the battery set to be connected to the protection IC.
    Type: Application
    Filed: June 29, 2011
    Publication date: April 18, 2013
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Takao Aradachi, Hiroyuki Hanawa
  • Patent number: 8381829
    Abstract: A battery device is constituted by connecting such cell assemblies in parallel as each includes: a first cell group having a plurality of cells connected in series; a housing container for housing the first cell group; current detector housed in the container for detecting a current to flow through the first cell group; a switching element connected with the first cell group for turning ON/OFF the current to flow through the first cell group; and a controller for controlling the ON/OFF of the switching element in response to the output signal of the current detector.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: February 26, 2013
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Kiyoshi Kato, Kazuhiko Funabashi, Katsuhiro Oomori
  • 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: 8035350
    Abstract: A setting current switching circuit 120 includes a comparator 127. A battery temperature signal corresponding to a battery temperature detected by a battery temperature detecting unit 8 is inputted to one input terminal (?) of the comparator 127 and a reference signal corresponding to a reference temperature is inputted to the other input terminal (+) of the comparator 127 to vary the setting charging current value of a charging current setting unit 80 and the setting full-charge current value of a full-charge current setting unit 90 correspondingly to the output of the comparator 127.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: October 11, 2011
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Takao Aradachi, Shinji Watanabe, Kazuhiko Funabashi, Hiroyuki Hanawa
  • 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: 7956575
    Abstract: Abnormal detecting means 112 for detecting that an electrically conductive foreign substance has migrated into a charging device 1 is provided, and whether or the foreign substance has migrated is judged from the detection result of the abnormal detecting means 112.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: June 7, 2011
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Yoshikazu Kawano, Nobuhiro Takano, Shinji Watanabe, Hiroyuki Hanawa
  • Patent number: 7948210
    Abstract: A battery pack includes a plurality of lithium battery cells, an analog thermo sensing member, and an analog switch. The analog thermo sensing member detects, in an analog form, a battery temperature of at least one of the plurality of lithium battery cells, and outputs an output preventing signal if the battery temperature is over a first predetermined temperature. The analog switch element is the plurality of lithium battery cells in series, and is switched, based on the output preventing signal, to a state in which a current is prevented from flowing in the plurality of lithium battery cells.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: May 24, 2011
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Kazuhiko Funabashi, Nobuhiro Takano, Eiji Nakayama, Hiroyuki Hanawa, Atsushi Sumi, Keita Saitou
  • Publication number: 20110025269
    Abstract: A battery charger includes an accommodating part for accommodating a group of cells and a plurality of cell assemblies respectively having charging terminals for charging the group of cells; a first terminal plate formed in the surface of the accommodating part to come into contact with the charging terminal of the first cell assembly and a second terminal plate coming into contact with the second cell assembly; a switching element for interrupting voltage from an ac power source; a unit for rectifying and smoothing the voltage interrupted by the switching element; and a unit for applying the smoothed dc voltage respectively to the first and second terminal plates.
    Type: Application
    Filed: February 28, 2007
    Publication date: February 3, 2011
    Inventors: Kazuhiko Funabashi, Katsuhiro Oomori, Hiroyuki Hanawa, Shinji Watanabe
  • Publication number: 20110005793
    Abstract: A battery pack 10 includes a housing 11, a group of cells 12, a board 13, a plurality of second terminals 14, and a cover 15. An opening 16c is formed in the housing 11. The board 13 has a terminal arranging part 13A. A plurality of the second terminals 14 are arranged on the terminal arranging part 13A of the board 13. The cover 15 has a plate-like shape, and covers an area of the board 13 which is positioned between the terminal arranging part 13A and the opening 16c.
    Type: Application
    Filed: September 9, 2010
    Publication date: January 13, 2011
    Applicant: HTIACHI KOKI CO., LTD.
    Inventors: Hiroyuki Hanawa, Kousei Yokoyama, Keita Saitou
  • Patent number: 7807293
    Abstract: A battery pack (10) includes a housing (11), a group of cells (12), a board (13), a plurality of second terminals (14), and a cover (15). An opening (16c) is formed in the housing (11). The board (13) has a terminal arranging part (13A). A plurality of the second terminals (14) are arranged on the terminal arranging part (13A) of the board (13). The cover (15) has a plate-like shape, and covers an area of the board (13) which is positioned between the terminal arranging part (13A) and the opening (16c).
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: October 5, 2010
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Kousei Yokoyama, Keita Saitou
  • Publication number: 20100248016
    Abstract: According to an aspect of the present invention, there is provided a battery pack to be inserted and attached to a power tool, including: a case; a battery cell accommodated inside the case; and an electrode terminal connected to the battery cell and provided on the case so as to be connectable to a tool-side electrode terminal, wherein the case includes: a case main portion; and a case sub portion which is protruded from the case main portion to be inserted into the power tool, and wherein the electrode terminal is provided on an upper surface of the case main portion at a side of the case sub portion.
    Type: Application
    Filed: October 29, 2008
    Publication date: September 30, 2010
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Hiroyuki Hanawa, Haruhisa Fujisawa, Keita Saitou
  • Patent number: 7759899
    Abstract: A battery pack has a housing, a battery cell containing part which is provided in the housing and contains battery cells, a plurality of first terminals which are electrically connected to the battery cell containing part, a plurality of second terminals through which control signals for controlling at least one of charge and discharge of the battery cells contained in the battery cell containing part are transmitted. The first and second terminals can be pressure fitted to corresponding terminals of the body of the apparatus. The first and second terminals are so constructed that when the housing has been attached to the body of the apparatus, fitting pressure exerted on the first terminals is higher than fitting pressure exerted on the second terminals.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: July 20, 2010
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Atsushi Nakagawa, Keita Saito
  • Publication number: 20100176761
    Abstract: The peripheral edge of the upper face 31A of a plate-shaped portion 31 of a holding member 30 confronts a terminal exposing through hole, cast through holes, and the inner periphery of an upper housing 10, i.e., a portion defining the terminal exposing through hole and the cast through holes. The upper face 31A of the plate-shaped portion 31 defines a passage for passing rain water having flown from the terminal exposing through hole and the cast through holes into a housing space 1a. The lower end of the passage forms grooves 30a and communicates with stepped through holes 12a formed in the upper housing 10, so that the rainwater is released from the stepped through holes 12a to the outside of the upper housing 10.
    Type: Application
    Filed: September 7, 2007
    Publication date: July 15, 2010
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Toshiyuki Suzuki, Hiroyuki Hanawa, Toshio Mizoguchi