Built-up core for the bead of a pneumatic tire for wheel rims with inclined shoulders
US4290471A · kind A · utility
9Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Dec 20, 1999 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD07B2501/2053
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a built-up core for the bead of a pneumatic tire, the wires (A,B,C) of each lay (8) of the built-up core (4) are of a trapezoidal cross section. Between the wires (A,B,C) of each lay (8) of wire and the wires (A,B,C) of the next, overlying lay (8) of wire, there are wedge-shaped clearances (9). As a result, the wires (A,B,C) of each lay (8) of wire find a support on the edges of the wire of the underlying lay of wires so that they cannot be displaced against each other during the production of the tire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.