×

PNEUMATIC TIRE

  • US 20130133797A1
  • Filed: 11/09/2012
  • Published: 05/30/2013
  • Est. Priority Date: 11/25/2011
  • Status: Active Grant
First Claim
Patent Images

1. A pneumatic tire comprising:

  • a tread portion having a left-right asymmetry tread pattern including an inboard tread edge and an outboard tread edge;

    an inboard half-tread portion between a tire equator and the inboard tread edge;

    an outboard half-tread portion between the tire equator and the outboard tread edge and having a land ratio greater than that of the inboard half-tread portion;

    a pair of circumferentially extending inboard and outboard center main grooves disposed both sides of a tire equator to define a center portion there between;

    a pair of circumferentially extending inboard and outboard shoulder main grooves disposed an axially outside of the inboard and outboard center main grooves;

    a pair of middle portions which include an inboard middle portion defined between the inboard center main groove and the inboard shoulder main groove and an outboard middle portion defined between the outboard center main groove and the outboard shoulder main groove;

    a pair of shoulder portions which include an inboard shoulder portion defined the axially outside of the inboard shoulder main groove and an outboard shoulder portion defined the axially outside of the outboard shoulder main groove;

    a plurality of inboard lateral main grooves extending from the axially outside of the inboard tread edge to the axially inside of the tire beyond the tire equator without reaching the outboard center main groove;

    the inboard shoulder portion being provided with a plurality of inboard shoulder lateral grooves, and each inboard shoulder lateral groove provided between adjacent inboard lateral main grooves in the circumferential direction of the tire and extending from axially outside of the inboard tread edge toward the tire equator without reaching the inboard shoulder main groove;

    the outboard shoulder portion being provided with a plurality of outboard shoulder lateral grooves, and each outboard shoulder lateral groove extending from the axially outside of the outboard tread edge toward the tire equator without reaching the outboard shoulder main groove;

    the inboard middle portion being provided with a plurality of inboard middle lateral grooves, and each inboard middle lateral groove provided between adjacent inboard lateral main grooves in the circumferential direction of the tire and extending from the inboard shoulder main groove toward the tire equator without reaching the inboard center main groove;

    the outboard middle portion being provided with a plurality of outboard middle lateral grooves and a plurality of outboard middle sub lateral grooves;

    each said outboard middle lateral groove extending from the outboard shoulder main groove toward the tire equator without reaching the outboard center main groove so as to have an axially inner end terminating within the outboard middle portion;

    each said outboard middle sub-lateral groove provided between adjacent outboard middle lateral grooves in the circumferential direction of the tire and extending from the outboard shoulder main groove toward the tire equator without reaching the outboard center main groove so as to have an axially inner end terminating the axially outside than the axially inner end of the outboard middle lateral groove; and

    the number of outboard middle sub lateral grooves being smaller than that of inboard middle lateral grooves.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×