Patents by Inventor Kazuo Hachiya

Kazuo Hachiya 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).

  • Flame-retardant rubber tires
    Patent number: 5531256
    Abstract: In a flame-retardant rubber tire comprising an outer rubber body portion consisting essentially of a tread rubber layer, a sidewall rubber layer extending inward from each side edge of the tread rubber layer toward the vicinity of a bead portion in radial direction and a rubber chafer layer arranged in the vicinity of the bead portion, a flame-retardant rubber composition having an oxygen index of not less than 19.8 but not more than 27.5 is disposed so as to amount at least 20% by weight of the tread rubber layer. Such rubber tires are used in electric vehicles, automobiles, airplanes and the like and have excellent self-extinguishing property and flame-delaying property without damaging other rubber properties.
    Type: Grant
    Filed: April 21, 1994
    Date of Patent: July 2, 1996
    Assignee: Bridgestone Corporation
    Inventors: Takatsugu Hashimoto, Keizo Akutagawa, Kazuo Yagawa, Makoto Tanaka, Junichi Yamagishi, Kazuo Hachiya
  • Flame-retardant rubber tires
    Patent number: 5341862
    Abstract: In a flame-retardant rubber tire comprising an outer rubber body portion consisting essentially of a tread rubber layer, a sidewall rubber layer extending inward from each side edge of the tread rubber layer toward the vicinity of a bead portion in radial direction and a rubber chafer layer arranged in the vicinity of the bead portion, a flame-retardant rubber composition having an oxygen index of not less than 19.8 but not more than 27.5 is disposed so as to amount at least 20% by weight of the tread rubber layer. Such rubber tires are used in electric vehicles, automobiles, airplanes and the like and have excellent self-extinguishing property and flame-delaying property without damaging other rubber properties.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: August 30, 1994
    Assignee: Bridgestone Corporation
    Inventors: Takatsugu Hashimoto, Keizo Akutagawa, Kazuo Yagawa, Makoto Tanaka, Junichi Yamagishi, Kazuo Hachiya
  • Flame-retardant rubber compositions
    Patent number: 5340867
    Abstract: A flame-retardant rubber composition has an oxygen index of 19.8-27.5 and comprises not more than 24% by weight of red phosphorus as a flame retardant based on the rubber composition and a nitrile group-containing elastomer as a flame-retardant polymer component as a part of rubber ingredients constituting the rubber composition. Such flame-retardant rubber compositions are very useful in applications such as industrial goods, tire and the like strongly requiring the fire preventing function.
    Type: Grant
    Filed: November 4, 1992
    Date of Patent: August 23, 1994
    Assignee: Bridgestone Corporation
    Inventors: Kazuo Yagawa, Takatsugu Hashimoto, Junichi Yamagishi, Kazuo Hachiya, Satoshi Takezawa