Tire
First Claim
1. A tire and a wheel rim having a pair of annular bead seats which are each tapered axially and radially inwardly toward the center of the rim, said tire comprising a tread, two sidewalls, and two beads for contact with said rim bead seats when mounted thereon, said tire beads each comprising a seating surface having prior to mounting on the rim, an angle of taper substantially greater than the angle of taper of the rim bead seat, an inextensible bead core assembly, a rubberized carcass ply, and an elastically extensible annular member located axially and radially inwards of each bead core assembly to form an axially and radially projecting extended toe portion of each tire bead, each edge portion of the carcass ply in the vicinity of each bead core assembly extending generally from the outside of the tire to the interior thereof around the axially outer side of the bead core assembly and radially inwards of the associated annular member, the arrangement being such that upon mounting of the tire on the wheel rim the extended toe portion will rotate in an axially inward direction about the bead core assembly thereby tensioning the carcass ply.
1 Assignment
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Accused Products
Abstract
A tire, which may be pneumatic or non-pneumatic, having beads which are each provided with an elastic annular member axially and radially inwardly of the associated bead core. The carcass ply is wrapped axially outwards of the bead core and part of the annular member.
The tire bead seat has a taper angle which is greater than that of the rim bead seat such that on fitment of the tire to the rim the annular member, and the associated edge of the ply rotate around the bead core and cause the carcass ply to be placed in tension.
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Citations
11 Claims
- 1. A tire and a wheel rim having a pair of annular bead seats which are each tapered axially and radially inwardly toward the center of the rim, said tire comprising a tread, two sidewalls, and two beads for contact with said rim bead seats when mounted thereon, said tire beads each comprising a seating surface having prior to mounting on the rim, an angle of taper substantially greater than the angle of taper of the rim bead seat, an inextensible bead core assembly, a rubberized carcass ply, and an elastically extensible annular member located axially and radially inwards of each bead core assembly to form an axially and radially projecting extended toe portion of each tire bead, each edge portion of the carcass ply in the vicinity of each bead core assembly extending generally from the outside of the tire to the interior thereof around the axially outer side of the bead core assembly and radially inwards of the associated annular member, the arrangement being such that upon mounting of the tire on the wheel rim the extended toe portion will rotate in an axially inward direction about the bead core assembly thereby tensioning the carcass ply.
Specification