High-durable pneumatic radial tires
US4628977A · kind A · utility
5Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Oct 31, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD07B2205/3035
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A high-durable pneumatic radial tire is disclosed using steel cords in at least one of the carcass and the belt. This steel cord is produced by twisting plural steel filaments each having a tensile strength of not less than 220 kgf/mm.sup.2, whose metallic structure being a fine pearlite structure having an average value of interlamellar distance between cementites of 300-500 .ANG. and an average sectional area of single pearlite crystal grain in filament section of not more than 20 .mu.m.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.