Patents by Inventor Taku Yamaga

Taku Yamaga 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).

  • Method of manufacturing adhesive-free laminate of aramid paper and polyphenylene sulfide film, and insulation material and insulation structure for rotating electric machinery
    Patent number: 8709193
    Abstract: A low-temperature plasma treatment is applied to a surface of an aramid paper so as to allow the surface to have a compositional atomic ratio X (O/C) of the number of oxygen atoms (O) to the number of carbon atoms (C) ranging from 110% to 220% of a theoretical atomic ratio. The treatment is performed at an intensity ranging from 120 to 1500 W·min/m2 with a low-temperature plasma treatment apparatus of internal electrode system. The aramid paper is superposed with a nonhydrolyzable resin film and the resulting article is pressurized to give an aramid-resin film laminate. The laminate is inexpensive, has both superior electrical properties and high mechanical strength, excels in elasticity, and is useful as an insulation material.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: April 29, 2014
    Assignees: Hitachi Engineering & Services Co., Ltd., Kawamura Sangyo Co., Ltd.
    Inventors: Kenichirou Tada, Satoru Nakanishi, Taku Yamaga, Shun Ito, Kenichi Watanabe, Miyoshi Yokura, Masashi Kato, Hisashi Katsumata