Patents by Inventor Katsutoshi Tani

Katsutoshi Tani 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 including a wound auxiliary belt layer
    Patent number: 5316064
    Abstract: A pneumatic radial tire comprises a radial carcass of at least one carcass ply, a belt and a tread successively arranged on the carcass outward from the crown portion in radial direction, in which the tread has a plurality of circumferential grooves extending circumferentially of the tire and a plurality of island portions defined by these circumferential grooves and both side ends of the tread. The belt is comprised of at least two main belt layers and an auxiliary belt layer of a specific structure formed by helically and continuously winding a ribbon-shaped ply in series.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: May 31, 1994
    Assignee: Bridgestone Corporation
    Inventor: Katsutoshi Tani
  • Pneumatic radial tires for passenger cars
    Patent number: 5277238
    Abstract: A high-speed running pneumatic radial tire comprises a cylindrical crown portion, a pair of sidewall portions extending inward therefrom, a radial carcass extending from one of the sidewall portions through the crown portion to the other sidewall portion, and a belt and a tread successively superimposed on the crown portion outward in the radial direction of the tire. The tread has plural rows of blocks defined by plural circumferential grooves and many lateral grooves, and the belt is comprised of at least two main crosscord belt layers and an auxiliary belt layer arranged thereon. The auxiliary belt layer is formed by spirally winding a rubberized ribbon ply of heat-shrinkable cords on the main belt layers, in which an overlapped amount of the ribbon ply is made large in a zone of the tread substantially corresponding to the block row than in a zone of the tread substantially corresponding to the circumferential groove.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: January 11, 1994
    Assignee: Bridgestone Corporation
    Inventors: Misao Kawabata, Hisao Ushikubo, Yutaka Yamaguchi, Katsutoshi Tani, Hiroo Matsunaga
  • High performance pneumatic radial tires
    Patent number: 5228933
    Abstract: A high performance pneumatic radial tire comprises a toroidal carcass, a tread radially outside a crown portion of the carcass, a belt layer interposed between the carcass and the tread and having a same width of the tread, and an auxiliary layer arranged between the belt layer and the tread and covering the entire belt layer. organic cords are buried substantially parallel to an equatorial plane of the tire in the auxiliary layer, and land portions are defined between at least two circumferential main grooves formed in an outer surface portion of the tread and between the circumferential main grooves and axially opposite edges of the tread.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: July 20, 1993
    Assignee: Bridgestone Corporation
    Inventors: Misao Kawabata, Hisao Ushikubo, Yutaka Yamaguchi, Katsutoshi Tani, Hiroo Matsunaga