Tires
US4794968A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Jul 16, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C15/024
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A tire is disclosed, including a tread portion, sidewalls and a pair of beads each containing a substantially inextensible annular bead core, having a bead seat and an extended toe portion. The extended toe portion includes an elastomeric material, extending lengthwise from the bead core in a direction radially and axially inwards thereof, the toe of a rigidity in the direction of its length such that in use of the tire on a wheel rim having a groove complementary to the toe and engaging the toe when an axially inward force is applied to the tread portion, a radially and axially outwardly directed force is generated at the bead core to affect bead retention. The toe has a substantially continuous, circumferentially extending toe decoupling means at the junction of the tire bead seats and the toe so that the toe is effectively decoupled from the bead in bending of the toe axially inwards of the tire. The decoupling means may be a single cut of a small groove. The resultant tire may safely be fitted to a normal wheel rim without the usual groove for a TD type of tire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.