Patents by Inventor Tadanobu Nagumo

Tadanobu Nagumo 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).

  • Pneumatic radial tire arrangement for vehicle
    Patent number: 4854360
    Abstract: A pneumatic radial tire arrangement for a vehicle wherein each tire has a belt structure formed of two belt layers respectively made of steel cords and aromatic polyamide fiber cords and which have their edge portions folded back. Each tire is mounted to the vehicle with the folded back portion of the steel cord belt layer located towards the outer side of the vehicle to reduce steering pull during high speed performance of the vehicle.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: August 8, 1989
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Tadanobu Nagumo, Sadakazu Takei, Yukio Tozawa
  • Tread pattern
    Patent number: 4745954
    Abstract: A tread pattern in which the width and positions of grooves formed annularly in the portion of the surface of the tread which corresponds to the ground-contacting surface of the tire, in such a manner that the grooves extend in the circumferential direction of the tire, are suitably limited.
    Type: Grant
    Filed: August 11, 1986
    Date of Patent: May 24, 1988
    Assignee: The Yokohoma Rubber Co., Ltd.
    Inventors: Kiyoshi Toyohara, Kojiro Ishikawa, Tadanobu Nagumo
  • Radial-ply tire having low rolling resistance
    Patent number: 4319619
    Abstract: A pneutmatic radial-ply tire in which the rubber portion of at least one of a carcass ply and an undertread constituting the tire is made of a rubber which has a viscoelastic property of loss tangent, tan.delta., of 0.2 or lower (tan.delta..ltoreq.0.2) and storage modulus, G, of 120 Kg/cm.sup.2 or higher (G.gtoreq.120 kg/cm.sup.2), so that the rolling resistance of the tire is reduced without being accompanied by degradation of braking performance, control stability, comfortableness and wear resistance of the tire.
    Type: Grant
    Filed: March 20, 1980
    Date of Patent: March 16, 1982
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Masatoshi Kozima, Akinori Tokieda, Tadanobu Nagumo, Masaru Hirai
  • Crack prevention for pneumatic tire
    Patent number: 3938572
    Abstract: A pneumatic tire provided with a plurality of slots which are provided in tread grooves and extend in the transverse direction of the grooves but at a suitable spacing from each other for the purpose of confining between the slots the growth of cracks produced in the grooves, so that each crack is prevented from growing up to an extent exceeding the spacing between the slots.
    Type: Grant
    Filed: December 6, 1974
    Date of Patent: February 17, 1976
    Assignee: The Yokohama Rubber Co. Ltd.
    Inventors: Takuji Nishi, Kenhachi Mitsuhashi, Tadanobu Nagumo
  • Automobile tire
    Patent number: D290105
    Type: Grant
    Filed: June 13, 1984
    Date of Patent: June 2, 1987
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Tadanobu Nagumo, Tadayoshi Hiraga, Riichiro Mama, Tadashi Harashima, Izumi Kuramochi