Patents by Inventor Maki Irifune

Maki Irifune 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).

  • Wet type paper friction material with combined improved friction characteristics and compression fatigue strength
    Patent number: 6121168
    Abstract: A wet paper friction material, mainly used for a slip lock-up of an automatic transmission, obtained by impregnating a paper material with a thermosetting resin, thermosetting, and molding under pressure, to attain compatibility between a good frictional characteristic and good fatigue strength under compression, wherein the paper material, in addition to a cellulose pulp and a filler, contains 30 to 80 wt % of aramid pulp with its drainability being adjusted to 250 to 440 ml in a total amount of pulp, and further contains, as a friction modifier, diatomaceous earth cylindrically formed so as to be net-like in the cylinder part and having its mean length 4 to 6 .mu.m.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: September 19, 2000
    Assignees: Dynax Corporation, Nissan Motor Co., Ltd.
    Inventors: Maki Irifune, Tetsuya Ishitani, Takao Shibuya, Makoto Maeda, Nobutaka Chiba, Yasuhiro Murakami