Pneumatic tires
US5421391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1994 |
| Grant date | Jun 6, 1995 |
| Priority date | — |
| Expiry date | May 19, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C2011/0388
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
There is provided a pneumatic tire having slant main grooves extending from positions adjacent to a circumferential rib in a tread center zone toward each tread end in opposite directions to each other at a relatively small angle with respect to the circumferential direction of the tire. Each of the slant grooves extends at an angle of not more than 40.degree. to the circumferential direction of the tire, and slant auxiliary grooves are formed so as to extend at an angle of not less than 50.degree. with respect to the circumferential direction of the tire from the ends of the slant main grooves to the tread end in each of tread side zones, and further the negative ratio of the tread is maximized at the portion adjacent to the circumferential rib and tends to be decreased towards the tread ends. By means of this invention the wet property is enhanced and the pattern noise is reduced without adversely affecting the primary functions of the tire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.