Core wire for drive belt, drive belt, and method for manufacturing core wire and drive belt
US12123475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2021 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | May 6, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2331/021
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A core wire for a power-transmission belt includes a plied twisted cord formed by putting together and secondary twisting a plurality of primary twisted yarns. The primary twisted yarns include a plurality of hard primary twisted yarns (A) and one soft primary twisted yarn (B). The hard primary twisted yarns (A) include an aramid fiber, and a fineness of each hard primary twisted yarn (A) is 1500 dtex or less. The soft primary twisted yarn (B) includes a low elastic modulus fiber. A ratio (B/A) of a primary twist coefficient of the soft primary twisted yarn (B) to an average value of primary twist coefficients of the hard primary twisted yarns (A) is 0.5 to 1.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.