Patents by Inventor Chikamasa Hattori

Chikamasa Hattori 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: 7290867
    Abstract: A liquid delivering apparatus including: at least one piezoelectric element; a plurality of electrodes which generate an electric field for deforming the at least one piezoelectric element; a drive circuit which supplies a drive voltage to the plurality of electrodes; a plurality of liquid chambers which store liquid, the liquid being given pressure by deformation of the at least one piezoelectric element, so that the liquid is delivered from the plurality of liquid chambers to an exterior of the apparatus; and an insulating sheet and a plurality of wires which connect the plurality of electrodes to the drive circuit, the plurality of electrodes and the plurality of wires being formed on the insulating sheet.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: November 6, 2007
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Kazuo Kobayashi, Chikamasa Hattori
  • Publication number: 20050030350
    Abstract: A liquid delivering apparatus including: at least one piezoelectric element; a plurality of electrodes which generate an electric field for deforming the at least one piezoelectric element; a drive circuit which supplies a drive voltage to the plurality of electrodes; a plurality of liquid chambers which store liquid, the liquid being given pressure by deformation of the at least one piezoelectric element, so that the liquid is delivered from the plurality of liquid chambers to an exterior of the apparatus; and an insulating sheet and a plurality of wires which connect the plurality of electrodes to the drive circuit, the plurality of electrodes and the plurality of wires being formed on the insulating sheet.
    Type: Application
    Filed: June 28, 2004
    Publication date: February 10, 2005
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Kazuo Kobayashi, Chikamasa Hattori
  • Patent number: 5184053
    Abstract: A control device for a tool driving unit is disclosed wherein a tool such as a tap or a drill is controlled to be rotated and axially moved by the control device. The tool driving unit has a spindle servo motor adapted to be driven according to a spindle current command and a feed shaft servo motor adapted to be driven according to a feed shaft current command which are provided by a single microcomputer which operates as the control device. The microcomputer reads an NC program and outputs a spindle command for the spindle servo motor when performing tapping, and outputs both the spindle command and a first feed shaft command for the feed shaft servo motor when performing drilling. A thread pitch changing controller for controlling a thread pitch outputs a second feed shaft command for the feed shaft servo motor when performing tapping.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: February 2, 1993
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Satoshi Maruo, Chikamasa Hattori, Fumio Kameyama
  • Patent number: 5100271
    Abstract: A tool driving unit for moving a tool in axial direction thereof and for rotating the tool about its axis. The tool driving unit comprises a spindle supported in the housing frame, a tool chuck mounted on the one end portion of the spindle for holding the tool, a first motor including a first hollow rotor and for rotating the spindle, a second motor including a second hollow rotor and for moving the spindle in the axial direction, means for transmitting a rotation of the first hollow rotor to the spindle, and means for converting a rotation of the second hollow rotor into axial movement of the spindle. The first rotor is rotated to rotate the spindle which corotatably engages the first rotor through the transmitting means. The second rotor is rotated, and the spindle is smoothly moved axially forwardly or rearwardly by the converting means which converts rotary motion of the second rotor to axial motion of the spindle.
    Type: Grant
    Filed: March 28, 1989
    Date of Patent: March 31, 1992
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Fumio Kameyama, Chikamasa Hattori
  • Patent number: 5016117
    Abstract: An optical reading including a device for effecting discrimination between a dither-matrix reading area and a non-dither-matrix reading area on a subject copy, an irradiating device for irradiating local segments of the subject copy with light beams having different intensities, a reading device for obtaining image data representative of the presence or absence of an achromatic tone in each local segment based on an amount of the light beam reflected by each local segment, a control device for operating the irradiating and reading devices to irradiate the local segments in a predetermined discriminating zone of the subject copy with the light beams having different intensities at different times, to obtain first and second image data, a device for comparing the first and second image data of each local segment in the discrimination zone, to determine whether the first and second image data agree with each other or not for each local segment, and a device for determining that the discrimination zone is the dit
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: May 14, 1991
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Takayuki Matsumoto, Shuji Otsuka, Tetsuo Harano, Kouzi Takeyama, Suzuyo Murai, Kouichi Mino, Koji Matsumura, Chikamasa Hattori, Kazuhiro Kuwabara
  • Patent number: 5009554
    Abstract: A machine tool with a spindle for machining a large-diameter workpiece in that a servo motor for moving a spindle in the axial direction and a variable reluctance motor for rotating the spindle are installed in a housing, and a synchronous controller for synchronizing and driving the above-mentioned servo motor and the variable reluctance motor is provided. The variable reluctance motor has a characteristic in that a large driving torque can be obtained in a low rotating speed. By using a variable reluctance motor as a spindle motor, therefore, it is possible to obtain a large torque without providing a large size motor, and also possible to realize a large-diameter machining by a small-size unit.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: April 23, 1991
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Fumio Kameyama, Chikamasa Hattori