Highly durable tread pattern of a rib type pneumatic tire
US4078596A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1976 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | Oct 4, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S152/90
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A highly durable tread pattern of a rib type pneumatic tire using two grooves for heavy vehicles is disclosed. The tread is provided with a pair of zigzag grooves extending circumferentially of the tread and dividing the tread into a center rib and a pair of side ribs. The center rib is provided with a plurality of sipe grooves arranged in a row and substantially equally spaced on the circumference of the tread by a pitch corresponding to a pitch between the zigzag tread grooves. The center rib and the pair of side ribs do not interrupt their circumferential continuity. Each of the sipe grooves is composed of a circumferentially extending section inclined at an acute angle of smaller than 45.degree. with respect to the circumferential direction and a widthwisely extending section inclined at an angle of at least 45.degree. with respect to the circumferential direction. These sections are formed into hook-shaped, bracket-shaped or curve-shaped formation or a combination of these formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.