Patents by Inventor Fumio Bamba

Fumio Bamba 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).

  • Heavy duty pneumatic radial tires with specified carcass turnup arrangement
    Patent number: 5433257
    Abstract: The bead durability of the heavy duty pneumatic radial tire for truck and bus is improved by arranging a rubber stock composed of three rubbers A, B and C each having particular properties between a carcass ply and its turnup portion in the bead portion and/or rendering the turnup portion of the carcass ply in the bead portion into a particular arrangement.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: July 18, 1995
    Assignee: Bridgestone Corporation
    Inventors: Hiroshi Yamaguchi, Shigehito Kishinami, Hiroshi Ueda, Fumio Bamba
  • Heavy duty pneumatic radial tires with three piece rubber stocks
    Patent number: 5056575
    Abstract: The bead durability of the heavy duty pneumatic radial tire for truck and bus is improved by arranging a rubber stock composed of three rubbers A, B and C each having particular properties between a carcass ply and its turnup portion in the bead portion and/or rendering the turnup portion of the carcass ply in the bead portion into a particular arrangement.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: October 15, 1991
    Assignee: Bridgestone Corporation
    Inventors: Hiroshi Yamaguchi, Shigehito Kishinami, Hiroshi Ueda, Fumio Bamba
  • Super rigid rubber composition and a tire using the same
    Patent number: 4250939
    Abstract: A rubber composition comprising a sulfur-vulcanizable rubber, N,N'-dithiodiamine, a thermosetting resin and a curing agent has a high dynamic modulus in the vulcanizate. A tire using the vulcanizate as a bead filler rubber has improved impact absorbing property and vibration damping property and is excellent in the ride feeling.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: February 17, 1981
    Assignee: Bridgestone Tire Company Limited
    Inventors: Shoson Shibata, Akio Sato, Yoshihiro Hayakawa, Fumio Bamba