Patents by Inventor Satoru Umeki

Satoru Umeki 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).

  • Thermosetting resin composition comprising maleimide, anhydride, epoxy resin and wollastonite
    Patent number: 5276073
    Abstract: A thermosetting resin composition useful for slot insulation purposes is disclosed, which includes:a liquid epoxy resin;a curing agent including an acid anhydride;a maleimide resin in an amount of 3-50 parts by weight per 100 parts by weight of the liquid epoxy resin; andfinely divided wollastonite in an amount of 50-400 parts by weight per 100 parts by weight of the liquid epoxy resin.
    Type: Grant
    Filed: August 6, 1992
    Date of Patent: January 4, 1994
    Assignees: Somar Corporation, Hitachi, Ltd.
    Inventors: Ichiro Akutagawa, Kunimitsu Matsuzaki, Toshio Matsuo, Ryuichi Fujii, Satoru Umeki, Yoshimichi Ono, Takeo Miyamoto, Koki Ueta, Naoki Kamada
  • Armature of a rotary electric machine with a commutator and a conductor for the armature coil
    Patent number: 5130596
    Abstract: Lower coils (5b) and upper coils (5a) are inserted to slots (12) of a cylindrical armature core (4). The upper coils are used as crossover lines (102a) at the side of commutator (10) and form commutator segments. The crossover lines are approximately deviated by a pole pitch (yf) at the commutator and inserted to other slots as lower coils. The lower coils are used again as crossover lines and deviated approximately by the pole pitch at the opposite side of the commutator so as to be inserted again to the slots as the lower coils. An insulating resin (11) are forced to push into inner peripheral sides of the armature core, and the crossover lines forming a squirrel cage type shape and extending cylindrically from the core.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: July 14, 1992
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventor: Satoru Umeki