Patents by Inventor Eiji Nakayama

Eiji Nakayama 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).

  • Patent number: 6992464
    Abstract: A battery charger includes a battery voltage detector for detecting the voltage of a secondary battery and a battery temperature sensor for detecting the temperature of the secondary battery. A controller determines the voltage of the secondary battery prior to beginning the charging process based on output from the battery voltage detector. The controller also determines the charging level from among a plurality of levels that indicate how much time is required for the secondary battery to reach a full charge, based on the determined voltage of the secondary battery and output from the battery temperature sensor. A display is provided for displaying the charging level that indicates the time remaining to achieve a full charge.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: January 31, 2006
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuhiro Takano, Takao Aradachi, Toshio Mizoguchi, Eiji Nakayama, Kazuhiko Funabashi
  • Patent number: 6988386
    Abstract: The invention provides a knitted surface fastener made of warp knitted fabric, which eliminates necessity of resin coating for fixing a base portion of a pile loop and fusion between yarns, securing flexibility and ventilation proper to knitted fabric wherein, in a base fabric of a surface fastener, wales are formed with at least chain knitting yarns and the respective wales are connected including at least weft in-laid yarns, engaging element loops are formed of first and second engaging element forming yarns striding over two or more wales and the respective engaging element forming yarns are knitted into at least three adjoining courses on a same wale in a zigzag shape, at this time, the first and second engaging element forming yarns are knitted into adjoining same stitches of at least two or more courses of the same wale in the zigzag shape.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: January 24, 2006
    Assignee: YKK Corporation
    Inventors: Mitsuhisa Okawa, Eiji Nakayama, Mitsutoshi Ishihara
  • Patent number: 6967465
    Abstract: A DC power source unit supplies a DC voltage to an electrically powered tool through an adapter and also charges a battery pack used as an alternative power source of the tool. With the DC power source unit of the invention, a microcomputer receives a temperature signal indicative of a temperature of the battery pack and determines that the battery pack is fully charged based on the temperature signal. This determination is made regardless of whether the battery pack is being charged or not. As such, the fully charged condition of the battery pack can be accurately detected even if the tool is operated when the battery pack is almost fully charged.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: November 22, 2005
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuhiro Takano, Takeshi Takeda, Eiji Nakayama, Kazuhiko Funabashi
  • Patent number: 6949859
    Abstract: A commutator assembly for a motor has a recessed portion formed to each commutator segment so that coils, which are pressed and deformed by bending the hooks of commutator segments, can be accommodated in the recessed portion. With this arrangement, the commutator assembly can improve the reliability of electric connection of the hook of the commutator segments with a conductive wire.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: September 27, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Eiji Nakayama, Masayoshi Yamamoto, Katsumi Ohata, Keigo Okada
  • Patent number: 6848281
    Abstract: A stretchable warp knitted fabric comprising warp knitting yarns, first weft in-laid yarns and second weft in-laid yarns, and stretchable warp in-laid yarns. The second weft in-laid yarns consist of a plurality of at least non-stretchable yarns, and said second weft in-laid yarns run sequentially and separately in the course direction on different wale regions of the same course with having an arbitrary length respectively, while crossing the first weft in-laid yarns between courses. Consequently, even when pulled in a longitudinal direction, because the separate second weft in-laid yarns influence each other independently, the fabric does not have a great amount of ruffling in a width direction thereof and thus the a flat surface is maintained wherein there is no narrowing in the middle of the longitudinal direction.
    Type: Grant
    Filed: May 6, 2003
    Date of Patent: February 1, 2005
    Assignee: YKK Corporation
    Inventors: Mitsutoshi Ishihara, Toshiaki Takizawa, Eiji Nakayama
  • Publication number: 20050011232
    Abstract: A knitted surface fastener wherein pile loops are formed by knitting-in pile knitting yarns at the same time when a foundation fabric is knitted with foundation yarns. After the pile knitting yarns which form the pile loops stride between two or more wales to form loops, they are entangled with each stitch of the foundation yarns of three or more adjoining courses on a same wales continuously to form stitches. Of the stitches of the pile knitting yarns formed due to the pile knitting yarns entangled per each of the adjoining three or more courses, at least one or more stitches located in the middle are formed in a closed loop. Consequently, the necessity of back coating is eliminated and further, clearly square gaps are formed to achieve ventilation property and transparency.
    Type: Application
    Filed: June 25, 2004
    Publication date: January 20, 2005
    Inventors: Mitsutoshi Ishihara, Eiji Nakayama
  • Patent number: 6843077
    Abstract: A knitted surface fastener wherein pile loops are formed by knitting-in pile knitting yarns at the same time when a foundation fabric is knitted with foundation yarns. After the pile knitting yarns which form the pile loops stride between two or more wales to form loops, they are entangled with each stitch of the foundation yarns of three or more adjoining courses on a same wales continuously to form stitches. Of the stitches of the pile knitting yarns formed due to the pile knitting yarns entangled per each of the adjoining three or more courses, at least one or more stitches located in the middle are formed in a closed loop. Consequently, the necessity of back coating is eliminated and further, clearly square gaps are formed to achieve ventilation property and transparency.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: January 18, 2005
    Assignee: YKK Corporation
    Inventors: Mitsutoshi Ishihara, Eiji Nakayama
  • Publication number: 20040135548
    Abstract: A battery charger includes a battery voltage detector for detecting the voltage of a secondary battery and a battery temperature sensor for detecting the temperature of the secondary battery. A controller determines the voltage of the secondary battery prior to beginning the charging process based on output from the battery voltage detector. The controller also determines the charging level from among a plurality of levels that indicate how much time is required for the secondary battery to reach a full charge, based on the determined voltage of the secondary battery and output from the battery temperature sensor. A display is provided for displaying the charging level that indicates the time remaining to achieve a full charge.
    Type: Application
    Filed: November 18, 2003
    Publication date: July 15, 2004
    Inventors: Nobuhiro Takano, Takao Aradachi, Toshio Mizoguchi, Eiji Nakayama, Kazuhiko Funabashi
  • Publication number: 20040066172
    Abstract: A DC power source unit supplies a DC voltage to an electrically powered tool through an adapter and also charges a battery pack used as an alternative power source of the tool. With the DC power source unit of the invention, a microcomputer receives a temperature signal indicative of a temperature of the battery pack and determines that the battery pack is fully charged based on the temperature signal. This determination is made regardless of whether the battery pack is being charged or not. As such, the fully charged condition of the battery pack can be accurately detected even if the tool is operated when the battery pack is almost fully charged.
    Type: Application
    Filed: October 2, 2003
    Publication date: April 8, 2004
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Nobuhiro Takano, Takeshi Takeda, Eiji Nakayama, Kazuhiko Funabashi
  • Patent number: 6683439
    Abstract: A DC power source unit supplies a DC voltage to an electrically powered tool through an adapter and also charges a battery pack used as an alternative power source of the tool. With the DC power source unit of the invention, a microcomputer receives a temperature signal indicative of a temperature of the battery pack and determines that the battery pack is fully charged based on the temperature signal. This determination is made regardless of whether the battery pack is being charged or not. As such, the fully charged condition of the battery pack can be accurately detected even if the tool is operated when the battery pack is almost fully charged.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: January 27, 2004
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuhiro Takano, Takeshi Takeda, Eiji Nakayama, Kazuhiro Funabashi
  • Publication number: 20030211798
    Abstract: A stretchable warp knitted fabric comprising warp knitting yarns, first weft in-laid yarns and second weft in-laid yarns, and stretchable warp in-laid yarns. The second weft in-laid yarns consist of a plurality of at least non-stretchable yarns, and said second weft in-laid yarns run sequentially and separately in the course direction on different wale regions of the same course with having an arbitrary length respectively, while crossing the first weft in-laid yarns between courses. Consequently, even when pulled in a longitudinal direction, because the separate second weft in-laid yarns influence each other independently, the fabric does not have a great amount of ruffling in a width direction thereof and thus the a flat surface is maintained wherein there is no narrowing in the middle of the longitudinal direction.
    Type: Application
    Filed: May 6, 2003
    Publication date: November 13, 2003
    Applicant: YKK CORPORATION
    Inventors: Mitsutoshi Ishihara, Toshiaki Takizawa, Eiji Nakayama
  • Patent number: 6566843
    Abstract: A DC power source unit supplies a DC voltage to an electrically powered tool through an adapter and also charges a battery pack used as an alternative power source of the tool. With the DC power source unit of the invention, charging of the battery pack is stopped and supply of power to the tool is started instantaneously when the power switch of the tool is turned ON. The DC power source unit is also capable of outputting selective one of different drive voltages corresponding to the rated drive voltages of a variety of different tools and capable of charging battery packs with different battery voltages.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: May 20, 2003
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuhiro Takano, Takeshi Takeda, Eiji Nakayama, Kazuhiko Funabashi
  • Publication number: 20030057798
    Abstract: A commutator assembly for a motor has a recessed portion formed to each commutator segment so that coils, which are pressed and deformed by bending the hooks of commutator segments, can be accommodated in the recessed portion. With this arrangement, the commutator assembly can improve the reliability of electric connection of the hook of the commutator segments with a conductive wire.
    Type: Application
    Filed: September 26, 2001
    Publication date: March 27, 2003
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Eiji Nakayama, Masayoshi Yamamoto, Katsumi Ohata, Keigo Okada
  • Patent number: 6534885
    Abstract: An adapter includes a cord, a fitting portion, a voltage setting unit, and a fitting prevention mechanism. The cord is adapted to connect to a DC power source unit in order to receive DC voltage from the DC power source unit. The fitting portion is for insertion into the battery holding space of any one of a plurality of cordless power tools. The fitting portion receives the DC voltage received through the cord and supplies the DC voltage to a cordless power tool in which the fitting portion is properly inserted. The voltage setting unit is for setting voltage supplied through the fitting portion to the cordless power tool. The fitting prevention mechanism operates in linked association with operation of the voltage setting unit to prevent proper insertion of the fitting portion into a cordless power tool that has a rated voltage different from the voltage set by the voltage setting unit.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: March 18, 2003
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Atsushi Nakagawa, Eiji Nakayama, Takeshi Takeda
  • Patent number: 6495932
    Abstract: A DC power source unit includes a main unit that generates DC voltage, and an output cable. The output cable is connected, either integrally or detachably, at one end to the output of the main unit and another end to an adapter plug. The adapter plug is electrically connected to an electrically powered tool, such as an electrical drill. An output voltage switching unit switches the level of voltage supplied by the main unit to the electrically powered tool, to a level that matches the rated voltage of the electrically powered tool that corresponds to the fitting portion of the adapter plug.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: December 17, 2002
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Chikai Yoshimizu, Hiroaki Orikasa, Takahiko Shimada, Shigeru Shinohara, Eiji Nakayama, Kazuhiko Funabashi, Atsushi Nakagawa
  • Publication number: 20020175654
    Abstract: A DC power source unit supplies a DC voltage to an electrically powered tool through an adapter and also charges a battery pack used as an alternative power source of the tool. With the DC power source unit of the invention, a microcomputer receives a temperature signal indicative of a temperature of the battery pack and determines that the battery pack is fully charged based on the temperature signal. This determination is made regardless of whether the battery pack is being charged or not. As such, the fully charged condition of the battery pack can be accurately detected even if the tool is operated when the battery pack is almost fully charged.
    Type: Application
    Filed: May 24, 2002
    Publication date: November 28, 2002
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Nobuhiro Takano, Takeshi Takeda, Eiji Nakayama, Kazuhiko Funabashi
  • Publication number: 20020149345
    Abstract: A DC power source unit supplies a DC voltage to an electrically powered tool through an adapter and also charges a battery pack used as an alternative power source of the tool. With the DC power source unit of the invention, charging of the battery pack is stopped and supply of power to the tool is started instantaneously when the power switch of the tool is turned ON. The DC power source unit is also capable of outputting selective one of different drive voltages corresponding to the rated drive voltages of a variety of different tools and capable of charging battery packs with different battery voltages.
    Type: Application
    Filed: April 10, 2002
    Publication date: October 17, 2002
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Nobuhiro Takano, Takeshi Takeda, Eiji Nakayama, Kazuhiko Funabashi
  • Publication number: 20020047851
    Abstract: Image data scaled by a scaling circuit and then multiplied by a weighting factor by a weighting factor multiplier circuit and an on-screen-display (OSD) data multiplied by a weighting factor by a weighting factor multiplier circuit and then scaled by a scaling circuit are combined together by a combining circuit to generate composite image data and the resultant composite image data is accordingly reproduced.
    Type: Application
    Filed: October 16, 2001
    Publication date: April 25, 2002
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Katsunori Hirase, Eiji Nakayama, Tatsuo Hiramatsu
  • Publication number: 20010015579
    Abstract: An adapter includes a cord, a fitting portion, a voltage setting unit, and a fitting prevention mechanism. The cord is adapted to connect to a DC power source unit in order to receive DC voltage from the DC power source unit. The fitting portion is for insertion into the battery holding space of any one of a plurality of cordless power tools. The fitting portion receives the DC voltage received through the cord and supplies the DC voltage to a cordless power tool in which the fitting portion is properly inserted. The voltage setting unit is for setting voltage supplied through the fitting portion to the cordless power tool. The fitting prevention mechanism operates in linked association with operation of the voltage setting unit to prevent proper insertion of the fitting portion into a cordless power tool that has a rated voltage different from the voltage set by the voltage setting unit.
    Type: Application
    Filed: February 20, 2001
    Publication date: August 23, 2001
    Inventors: Atsushi Nakagawa, Eiji Nakayama, Takeshi Takeda
  • Patent number: 6172860
    Abstract: A DC power source unit includes a main unit that generates DC voltage, and an output cable. The output cable has one end connected to the output of the main unit and another end attached to an adapter plug. The adapter plug Is electrically connected to an electrically powered tool, such as an electrical drill. Current flowing in the tool is detected every predetermined interval and accumulated electrical quantity is computed based on the detected current flowing in the tool. Based on the accumulated electrical quantity, the temperature of the tool is predicted. When it is determined that the tool is heated up to a first critical temperature based on the accumulated electrical quantity, an alarm unit is actuated. When it is determined that the tool is further heated up to a second critical temperature, supply of current to the tool is interrupted.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: January 9, 2001
    Assignee: Hitachi Koki Co., LTD
    Inventors: Chikai Yoshimizu, Hiroaki Orikasa, Takahiko Shimada, Shigeru Shinohara, Eiji Nakayama, Kazuhiko Funabashi, Atsushi Nakagawa