Patents by Inventor Yasuhide Matsumura

Yasuhide Matsumura 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: 5005434
    Abstract: An autosampler consists of a needle to draw specimen from a specimen container into a passage therein; a block having a passage that follows the passge in the needle; a suction mechanism for drawing in the specimen by suction through the passages in the needle and the block; a discharge mechanism for discarding the specimen drawn in by the suction mechanism; and a detecting device for detecting air bubble in the specimen, the detecting device being embedded in the block in such a manner as to face the passage in the block. The detecting device detects the air bubbles in the specimen according to changes in physical or chemical properties of the specimen passing through the passage in the block. The discharge mechanism is activated by the detecting device to discharge air-mixed specimen.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: April 9, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Yoshio Watanabe, Mamoru Taki, Junkichi Miura, Masao Kamahori, Hiroyuki Miyagi, Yasuhide Matsumura, Masafumi Kanetomo
  • Patent number: 4934781
    Abstract: The rotating mirror light deflecting system employs a non-circular dynamic gas bearing providing dynamic pressure to radially support the shaft. The bearing is provided internally with a multiplicity of grooves or embankments whereby dynamic gas pressure is increased to enhance rigidity. The bearing radially moves as a whole with damping according to a movement of the shaft, thus permitting nondestructive movement of the shaft and absorption of the resonant energy of the shaft. The shaft and the bearing will not come in contact with each other, and oscillation energy of the shaft is absorbed or dissipated by an external viscous or hysteresis resistance of the bearing therefore resonance oscillation is attenuated on the instant it occurs.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: June 19, 1990
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Shigeo Kato, Susumu Saito, Yasuhide Matsumura, Gyozo Toda
  • Patent number: 4542712
    Abstract: An apparatus for molecular beam epitaxy according to the present invention is so constructed that a substrate is introduced into a vacuum vessel with a substrate surface for epitaxial growth facing in the direction of gravity, and that the substrate is conveyed to and transferred into vacuum chambers for performing processes necessary for the epitaxial growth, with the substrate surface maintained in the direction of gravity and without directly touching the substrate surface.
    Type: Grant
    Filed: June 22, 1984
    Date of Patent: September 24, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Sato, Sumio Yamaguchi, Shigeo Kato, Yasuhide Matsumura, Muneo Mizumoto, Sumio Okuno, Naoyuki Tamura
  • Patent number: 4179783
    Abstract: A holding apparatus coupled to a drive shaft provides a holding mechanism. An elastic mechanism coupling the holding mechanism to the drive shaft and detectors for detecting a deflection of the holding mechanism with respect to the drive shaft. The holding mechanism holds a first member which is assembled to a second member and is controlled in response to a representative signal generated by the detectors. The elastic mechanism comprises two independent springs, one of which supports elastically the holding mechanism in the axial direction of the shaft and the other of which supports elastically the holding mechanism in the direction perpendicular to the axial direction thereof, whereby the holding mechanism is movably coupled with the drive shaft.
    Type: Grant
    Filed: September 20, 1977
    Date of Patent: December 25, 1979
    Assignee: Hitachi, Ltd.
    Inventors: Tadao Inoyama, Yasuhide Matsumura, Yukio Nagano
  • Patent number: 4095481
    Abstract: A joint mechanism of a manipulator, according to the present invention, consists of a first joint having its rotating shaft aligned with the Z-axis in the X-Y-Z Cartesian coordinate system established at a desired position in a working space, a second joint connected to the rotating shaft of the first joint and having its rotating shaft positioned within the X-Y coordinate plane, a third joint, connected to the rotating shaft of the second joint and having its rotating shaft aligned with the vector passing through the origin of the Cartesian coordinate system, and an arm assembly connected to the rotating shaft of the third joint and comprising a link mechanism which is driven so that a wrist connected to said arm assembly may be always moved on the prolongation line of the vector, to thereby provide a simplified joint mechanism of a manipulator having a redundant degree of freedom of the posture completely independent to the position of the wrist.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: June 20, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Masuo Kasai, Kanji Kato, Yasuhide Matsumura, Kiyoo Takeyasu, Raiji Shimomura