Patents by Inventor Yasuo Numata

Yasuo Numata 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).

  • Ink jet printer in which reaction force is canceled
    Patent number: 6533389
    Abstract: The present invention relates to an ink jet printer in which drops of ink are jetted out onto a surface of a recording medium so as to record an image. The present invention is to obtain an economical ink jet printer in which a reaction force generated in the reciprocal motion of the ink jet head is simply canceled, and the ink jet printer is small and light, and less vibration is caused in the printer, and further it is possible to drive the printer with a small amount of drive energy.
    Type: Grant
    Filed: March 9, 2001
    Date of Patent: March 18, 2003
    Assignee: Fujitsu Limited
    Inventors: Masao Hiyane, Toshio Fukushima, Kazuki Ogawa, Yasuo Numata, Yuji Yoshida
  • Ink jet printer in which reaction force is canceled
    Publication number: 20020154188
    Abstract: The present invention relates to an ink jet printer in which drops of ink are jetted out onto a surface of a recording medium so as to record an image. The present invention is to obtain an economical ink jet printer in which a reaction force generated in the reciprocal motion of the ink jet head is simply canceled, and the ink jet printer is small and light, and less vibration is caused in the printer, and further it is possible to drive the printer with a small amount of drive energy.
    Type: Application
    Filed: March 9, 2001
    Publication date: October 24, 2002
    Applicant: Fujitsu Limited
    Inventors: Masao Hiyane, Toshio Fukushima, Kazuki Ogawa, Yasuo Numata, Yuji Yoshida
  • Ink jet printer in which reaction force is canceled
    Patent number: 6231158
    Abstract: The present invention relates to an ink jet printer in which drops of ink are jetted out onto a surface of a recording medium so as to record an image. The present invention is to obtain an economical ink jet printer in which a reaction force generated in the reciprocal motion of the ink jet head is simply canceled, and the ink jet printer is small and light, and less vibration is caused in the printer, and further it is possible to drive the printer with a small amount of drive energy.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: May 15, 2001
    Assignee: Fujitsu Limited
    Inventors: Masao Hiyane, Toshio Fukushima, Kazuki Ogawa, Yasuo Numata, Yuji Yoshida
  • Piezoelectric fluid pump
    Patent number: 5906481
    Abstract: A piezoelectric fluid pump includes a stationary pump base and a plurality of piezoelectric elements arranged in parallel on the stationary pump base, each of the piezoelectric elements having, in a polarizing direction thereof or in a direction perpendicular to the polarizing direction, a first end fixed to the stationary pump base and a free, second end. The free, second ends of respective pairs of adjacent the piezoelectric elements are connected to each other, for respective units of the fluid pump. Between the pair of piezoelectric elements and between the stationary pump base and the connecting means, pressure chambers are defined. There are gaps are between walls of the piezoelectric elements and walls of piezoelectric elements of adjacent units.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: May 25, 1999
    Assignees: Fujitsu Limited, Fujitsu Isotec Limited
    Inventors: Kazuki Ogawa, Yuji Yoshida, Motoyuki Nishizawa, Nobuo Kamehara, Akio Yano, Akihiko Miyaki, Masahiro Ono, Yasuo Numata, Kazuaki Kurihara, Keiji Watanabe