Pneumatic tire having sipes including at least three tie-bars
US6050313A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1997 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Nov 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S152/903
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pneumatic tire comprises a tread portion which is provided with a plurality of circumferential grooves extending continuously in the tire circumferential direction to axially divide the tread portion into a plurality of land portions, at least one of the land portions is provided with sipes each extending across the full width of the land portion to have a pair of open ends, each of the sipes is provided therein with at least three tie-bars to provide the bottom of the sip with at least three shallow parts in the open ends and therebetween and at least two deep parts between the shallower parts, and the depth (h2) at the shallow parts is set in the range of from 0.2 to 0.8 times the depth (h1) at the deep parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.