Patents Assigned to Sumitomo Rubbert Industries, Ltd.
  • Patent number: 6220324
    Abstract: A vehicle tire having an outside tread part and an inside tread part to be placed on the outside and inside of a vehicle, respectively, the inside tread part provided with inside axial grooves to be circumferentially divided into inside blocks, the outside tread part provided with outside axial grooves and outside circumferential grooves to be circumferentially and axially divided into outside blocks, and the inclinations of the grooves when looking down the tire are as follows: the outside axial grooves are inclined toward one direction such that the outer ends thereof are positioned backward of the inner ends, and the inclination angle &agr; is in the range of from 60 to 80 degrees with respect to the tire equator C; the outside circumferential grooves are inclined toward one direction such that the outer ends thereof are positioned forward of the inner ends, and the inclination angel &ggr; is in the range of from 15 to 45 degrees with respect to the tire equator C; and the inside axial grooves are inclined
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: April 24, 2001
    Assignee: Sumitomo Rubbert Industries, Ltd.
    Inventor: Hiroshi Oohigashi
  • Patent number: 4936364
    Abstract: A low-noise tire which comprising a plurality of block lines which run in the circumferential direction of the tire. The block lines include a basic block line made up of unit blocks arranged at a uniform pitch in the circumferential direction of the tire and phase-difference block lines each made up of unit blocks arranged such that the phase in the circumferential direction is shifted with respect to that of the unit blocks in the basic block line. The phase difference varies from one unit block to the adjacent one in the circumferential direction. The length of the unit block in the basic block line is smaller than that of the unit block in the phase-difference block line.
    Type: Grant
    Filed: March 7, 1986
    Date of Patent: June 26, 1990
    Assignee: Sumitomo Rubbert Industries, Ltd.
    Inventors: Shinzo Kajiwara, Kaoru Furubayashi
  • Patent number: D451854
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: December 11, 2001
    Assignee: Sumitomo Rubbert Industries, Ltd.
    Inventor: Masahiro Hanya