Patents by Inventor Kazuhiro Maekawa

Kazuhiro Maekawa 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: 6407471
    Abstract: The invention relates to a linear motor which is provided with a row of permanent magnets 6a, 6b, 6c, . . . for a field system, and an armature 2 facing the same via a magnetized space in an orthogonal direction thereto, wherein the armature core 3 has a winding accommodation groove 3a formed at both sides of armature iron plates produced by punching out oriented electromagnetic steel plate so as to become rectangular, and convex and concave engagement portions 3b and 3c, the armature iron plates are laminated to constitute one core block, and at the same time, the lengthwise direction, orthogonal to the permanent magnet row, in the respective core blocks is made the same as the rolling direction of electromagnetic steel plates. Thereby, since the magnetic flux of the armature winding 4 flows along the rolling direction of the core blocks, the magnetic flux density can be increased, and the peak thrust can be also increased.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: June 18, 2002
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Yasuhiro Miyamoto, Masaki Hisatsune, Kazuhiro Maekawa, Takato Doi, Masahiko Tanabe
  • Publication number: 20020036740
    Abstract: The liquid crystal display device of this invention includes a plurality of picture element regions each defined by a first electrode provided on a face of a first substrate facing a liquid crystal layer and a second electrode provided on a second substrate so as to oppose the first electrode via the liquid crystal layer sandwiched therebetween. In each of the picture element regions, the first electrode has a plurality of openings and a solid portion, the liquid crystal layer is in a vertical orientation state when no voltage is applied between the first electrode and the second electrode, and when a voltage is applied between the first electrode and the second electrode, a plurality of liquid crystal domains each in a radially-inclined orientation state are respectively formed in the plurality of openings and the solid portion by inclined electrode fields generated at respective edge portions of the openings of the first electrode.
    Type: Application
    Filed: August 8, 2001
    Publication date: March 28, 2002
    Inventors: Masumi Kubo, Akihiro Yamamoto, Takashi Ochi, Tetsuhiro Yamaguchi, Naoshi Yamada, Katsuhiko Morishita, Kiyoshi Ogishima, Kazuhiro Maekawa
  • Publication number: 20020036744
    Abstract: The liquid crystal display device of this invention includes a first substrate, a second substrate, a liquid crystal layer disposed between the first substrate and the second substrate and a plurality of picture element regions for producing a display. In each of the plurality of picture element regions, a picture element electrode provided on the face of the first substrate facing the liquid crystal layer and a switching element electrically connected to the picture element electrode are provided. The picture element electrode includes a plurality of sub-picture element electrodes and a plurality of contact portions for mutually electrically connecting at least some of the plurality of sub-picture element electrodes. At least one of the plurality of sub-picture element electrodes is electrically connected to the switching element via a plurality of connection paths.
    Type: Application
    Filed: August 2, 2001
    Publication date: March 28, 2002
    Inventors: Masumi Kubo, Akihiro Yamamoto, Takashi Ochi, Kiyoshi Ogishima, Kazuhiro Maekawa
  • Patent number: 6351723
    Abstract: The present invention regards to a failure diagnostic method and apparatus for diagnosing a failure of equipment based on an operating state of the equipment. In the present invention, operating parameters which represent the operating state of the equipment are obtained in time series, a predetermined number of operating state parameters are selected from the obtained operating state parameters, a value of a deviation process capability is calculated from the predetermined number of operating state parameters every time the predetermined number of operating state parameters are selected, and the state regarding the failure of the equipment is determined based on the value of the deviation process capability.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: February 26, 2002
    Assignee: Fujitsu Limited
    Inventor: Kazuhiro Maekawa
  • Publication number: 20010024257
    Abstract: The present invention provides a liquid crystal display device having a high display quality. The liquid crystal display device displays an image by applying a voltage by a first electrode and a second electrode across a liquid crystal layer which takes a vertical alignment in the absence of an applied voltage. The first electrode includes a lower conductive layer, a dielectric layer covering at least a portion of the lower conductive layer, and an upper conductive layer provided on one side of the dielectric layer which is closer to the liquid crystal layer. The upper conductive layer includes a first opening, and the lower conductive layer is provided so as to oppose at least a portion of the first opening via the dielectric layer.
    Type: Application
    Filed: February 23, 2001
    Publication date: September 27, 2001
    Inventors: Masumi Kubo, Akihiro Yamamoto, Takashi Ochi, Kazuhiro Maekawa, Shohgo Fujioka
  • Patent number: 4888242
    Abstract: A refractory heat-insulating graphite sheet material characterized in that the material comprises a graphite sheet.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: December 19, 1989
    Assignee: Toyo Tanson Co., Ltd.
    Inventors: Koichiro Matsuo, Kazuhiro Maekawa, Teruhisa Kondo