Patents by Inventor Masaaki Hoko

Masaaki Hoko 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).

  • Rotating electric machine usable in radioactive environment
    Patent number: 6133661
    Abstract: The invention relates to a rotating electric machine including a coil of a wire having thereon an insulating coating comprising a polybenzimidazole. This rotating electric machine is stably maintained for a long time in dielectric strength even under a highly radioactive environment, due to the use of the special insulating coating. With this, the rotating electric machine can be driven stably for a long time. The invention further relates to another rotating electric machine including (a) a rotor having a rotating shaft; (b) a bearing for supporting the rotating shaft; and (c) a grease applied to the bearing. This grease contains (1) a polyphenyl ether having at least three aromatic rings in the molecule and (2) a urea. The rotor of this rotating electric machine is stably supported in the bearing for a long time even under a highly radioactive environment, due to the use of the special grease. Thus, this rotating electric machine can also be rotated stably for a long time.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: October 17, 2000
    Assignees: Kabushiki Kaisha Meidensha, Kandenko Co., Ltd., Sumitomo Wiring Systems, Ltd.
    Inventors: Yoshinao Okawa, Yoshihiro Murano, Isao Ito, Kenichi Okada, Kazuo Funabashi, Masanori Miyamoto, Kiyohito Mizuide, Yasuhiko Onishi, Masaaki Hoko, Hirotugu Kinoshita, Fumihiro Itano, Makoto Noda, Takeshi Uesugi, Kiyoshi Nagasawa, Shuzo Tanigaki, Yoshiyuki Ema