Patents by Inventor Seiichi Baba

Seiichi Baba 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: 8237322
    Abstract: To provide a well balanced squirrel-cage rotor for an electric motor, quantities of braze used to bond various rotor components are different from each other so as to serve as balance weight in order to improve balance.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: August 7, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Hiromichi Hiramatsu, Seiichi Baba, Toru Sakai, Takeshi Abe, Kazuhide Ebine
  • Publication number: 20110074240
    Abstract: To provide a well balanced squirrel-cage rotor for an electric motor, quantities of braze used to bond various rotor components are different from each other so as to serve as balance weight in order to improve balance.
    Type: Application
    Filed: June 22, 2010
    Publication date: March 31, 2011
    Inventors: Hiromichi HIRAMATSU, Seiichi Baba, Toru Sakai, Takeshi Abe, Kazuhide Ebine
  • Patent number: 5982579
    Abstract: An apparatus having a magnetic head assembly including a plurality of arms each arm having a magnetic head fixed to a nose portion thereof and a magnetic disk unit having a plurality of magnetic disks mounted on a rotating shaft. The spacing between adjacent magnetic disks being set at a value corresponding to the thicknesses of the magnetic heads fixed to two of the arms, plus the thickness of the two arms, plus a rotating gap of the magnetic heads, plus a space of 0.1 mm or less. Further included is a disk height measuring device and a head measuring device for measuring the heights of the disks and the magnetic heads. An expansion device expands the spacing between the adjacent arms. The spacing between the adjacent arms being expanded an appropriate amount to provide optimal operation of the magnetic disk apparatus.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: November 9, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Tsutomu Tanaka, Takayuki Suzuki, Seiichi Baba, Hiroshi Katou, Keisuke Yamaoka
  • Patent number: 5754364
    Abstract: An apparatus having a magnetic head assembly including a plurality of arms each arm having a magnetic head fixed to a nose portion thereof and a magnetic disk unit having a plurality of magnetic disks mounted on a rotating shaft. The spacing between adjacent magnetic disks being set at a value corresponding to the thicknesses of the magnetic heads fixed to two of the arms, plus the thickness of the two arms, plus a rotating gap of the magnetic heads, plus a space of 0.1 mm or less. Further included is a disk height measuring device and a head measuring device for measuring the heights of the disks and the magnetic heads. An expansion device expands the spacing between the adjacent arms. The spacing between the adjacent arms being expanded an appropriate amount to provide optimal operation of the magnetic disk apparatus.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: May 19, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Tsutomu Tanaka, Takayuki Suzuki, Seiichi Baba, Hiroshi Katou, Keisuke Yamaoka
  • Patent number: 4871910
    Abstract: A method for measuring the size of a wire rod comprises the steps of turning a laser beam from a laser beam source into a parallel beam used for scanning, disposing a first wire rod having an unknown size and a second wire rod having an already known size larger than the diameter of the spot of the laser beam adjacent to each other in a direction of scanning with the laser beam, receiving the laser beam traversed the first and second wire rods thereby generating a corresponding electrical output signal, and calculating the size of the first wire rod on the basis of the electrical output signal.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: October 3, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Toru Ueno, Youichi Fukuoka, Seiichi Baba, Kaoru Miyoshi, Kazuto Kinoshita