Steel cord for rubber reinforcement
US12296631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2020 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Sep 27, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD07B2501/2046
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A steel cord with a construction of m+n having a first group of core filaments having a number of m and a second group of sheath filaments having a number of n, the second group and the first group are twisted around each other with the same twist pitch and same twist direction, wherein the core filaments are not twisted with each other, the core filaments are parallel or have a twist pitch being more than 300 mm, and the sheath filaments have a twist pitch being less than or equal to 30 mm, the core filaments have an average tensile strength Tc in MPa when being un-ravelled from said steel cord, the sheath filaments have an average tensile strength Ts in MPa when being un-ravelled from said steel cord, Tc and Ts satisfy: 5<(Tc−Ts)<200. The steel cord has high breaking load and high production efficiency without cost increase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.