Patents by Inventor Tamotsu Fukazawa

Tamotsu Fukazawa 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: 7095146
    Abstract: A running motor (100) used for vehicles is provided with a stator (200), a rotor (300) and a housing (400) for holding them, wherein the rotor has a support member (330) for preventing rotor magnets (320) from separating from a laminated steel sheet (310), the laminated steel sheet has a plurality of first steel sheets (311) each formed slots (311a) through which the rotor magnets are inserted respectively and a second steel sheet (312) to which the insertion ends of the rotor magnets are pressed, and the plurality of first steel sheets and the second steel sheet are configured to have mutually the same contour. The housing includes a control (500) for supplying a coil (210) of the motor with power and a sensor (600) for detecting a position of the rotor. Further, the housing includes a first housing member (410) for covering the stator and the rotor, a second housing member (420) for dividing the interior of the housing, and a third housing member (430) for covering the control.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: August 22, 2006
    Assignee: Tokyo R&D Co., Ltd.
    Inventors: Tamotsu Fukazawa, Hiroaki Nakahara
  • Publication number: 20040232786
    Abstract: A running motor (100) used for vehicles is provided with a stator (200), a rotor (300) and a housing (400) for holding them, wherein the rotor has a support member (330) for preventing rotor magnets (320) from separating from a laminated steel sheet (310), the laminated steel sheet has a plurality of first steel sheets (311) each formed slots (311a) through which the rotor magnets are inserted respectively and a second steel sheet (312) to which the insertion ends of the rotor magnets are pressed, and the plurality of first steel sheets and the second steel sheet are configured to have mutually the same contour. The housing includes a control (500) for supplying a coil (210) of the motor with power and a sensor (600) for detecting a position of the rotor. Further, the housing includes a first housing member (410) for covering the stator and the rotor, a second housing member (420) for dividing the interior of the housing, and a third housing member (430) for covering the control.
    Type: Application
    Filed: February 5, 2004
    Publication date: November 25, 2004
    Inventors: Tamotsu Fukazawa, Hiroaki Nakahara
  • Patent number: 5931245
    Abstract: A battery control system for an electric vehicle 1 which includes a propelling motor (7) and an electric power unit(10)for driving the motor comprises a plurality of discrete batteries (13a) to (13d) connected in series and outputting a predetermined motor voltage, a plurality of selection switches (25a) to (25h) which are provided corresponding in number to the discrete batteries(13a)to (13d) and selectively connect one of the discrete batteries (13a) to (13d) in parallel to a control circuit (16), a judging device (23) which determines a state of electric energy possessed by each of the discrete batteries (13a) to (13d) and a control device (23) which selects one of the discrete batteries(13a) to (13h) having a maximum energy based on the state of electric energy as determined by the judging device and activates one of the corresponding selection switches (25a) to (25h) accordingly, and a control stabilization circuit (24) provided between the selection switches (25a) to (25h) and the control circuit (16) t
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: August 3, 1999
    Assignees: Seiko Epson Corporation, Tokyo R & D Co., Ltd.
    Inventors: Akihito Uetake, Issei Yamakoshi, Kunihiko Takagi, Takeshi Seto, Haruki Torizuka, Tamotsu Fukazawa, Shinji Okayama
  • Patent number: 5853058
    Abstract: An electric power apparatus and a power transmitting apparatus of an electric vehicle are each constructed as a unit structure to improve the overall range and reliability of the electric vehicle. In the electric vehicle including, as a power system, a battery power supply, a motor, and a controller for controlling rotation of the motor, an electric power unit comprises a plurality of storage cells making up the battery power supply, a case housing the storage cells, a motor driving circuit and a charger both mounted on the case, a plate substrate covering the storage cells, and sockets for connecting respective terminals of the storage cells, the motor driving circuit and the charger.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: December 29, 1998
    Assignees: Seiko Epson Corporation, Tokyo R&D Co., Ltd.
    Inventors: Ken-ichi Endo, Issei Yamakoshi, Masao Ono, Tamotsu Fukazawa
  • Patent number: 5765671
    Abstract: An electric power apparatus and a power transmitting apparatus of an electric vehicle are each constructed as a unit structure to improve the overall range and reliability of the electric vehicle. In the electric vehicle including, as a power system, a battery power supply, a motor, and a controller for controlling rotation of the motor, an electric power unit comprises a plurality of storage cells making up the battery power supply, a case housing the storage cells, a motor driving circuit and a charger both mounted on the case, a plate substrate covering the storage cells, and sockets for connecting respective terminals of the storage cells, the motor driving circuit and the charger.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: June 16, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Ken-ichi Endo, Issei Yamakoshi, Masao Ono, Tamotsu Fukazawa