Assembly of pneumatic tire and rim
AssigneeThe Toyo Rubber Industry Co., Ltd.
InventorsAkira Yoshida, Taketoshi Kubo, Mashayuki Yamajo, Masahiro Ishigaki
Life of this patent
Estimating the term…
Abstract
An assembly of a pneumatic tire and a wheel rim in which the tire is provided unitedly with at least one ring-formed projection area to the outside of the rolling axis direction of the tire and adjacent the rim flange, whereby safety and durability are maintained without causing the bead areas to separate from the rim when the tire is "run flat." The projection area is disposed and formed adjacent the rim flange at a specified diameter difference, and the bead area inward of the tire is formed at a specified inclination. Further, the projection area is reinforced circumferentially with a reinforcing material and has a rigid part comprising a high modulus rubber compound.
Claims4
In a pneumatic tire and wheel assembly comprising:
- a tire including a tread and a pair of sidewalls extending radially inwardly therefrom on each side thereof and terminating in bead areas and a wheel rim comprising:
- an axially directed rim base, bead seats extending axially from said rim base to each side thereof and terminating in radially outwardly directed rim flanges, the improvement wherein said pneumatic tire comprises at least one unitary ring-formed projection axially outside of the wheel rim and adjacent the rim flange and including a first portion projecting radially inwardly of said rim flange such that when the tire has an inner air pressure of 0 and is under no load, the half difference between the minimum diamter of the ring-formed projection at said first portion and the outer diameter of the rim flange ranges from about 2 to 7 mm, said tire ring-formed projection further including a second, rigid portion radially beyond said rim, said second portion comprising a rubber compound having a 100% modulus of elasticity of about 30 to 70 kg/cm.sup.2, and wherein a reinforcing material extends in a circumferential direction of the tire and lies within said ring-formed projection, second rigid portion, at a position radially and axially outwards of said rim flange.
Dependencies are inferred from the claim text.