Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A run-flat tyre system comprising a tyre (2) and
a tyre core (5) disposed therein, the tyre having a
toroidal shape and comprising a tread portion (T), a
pair of sidewall potions (S) and a pair of axially
spaced bead portions (B) each with a bead core
therein and the tyre core (5) being an annular body
of an elastic closed-cell material, characterised in
that the radially outside and inside of the tyre
core each are provided with a circumferentially
extending groove (6,7), the radially inner groove
(7) extending radially outwardly beyond a bead core
line (CL), the bead core line (CL) being defined as
a straight axial line drawn between the centres of
the bead cores (C).
Claim 2
Dependent Claim
96 words
A run-flat tyre system according to claim 1,
characterised in that when the tyre is mounted on a
standard rim, the radially outer groove (6) forms a
radially outer space (9) extending circumferentially
of the tyre and having a cross sectional area of
from 1 to 6 % of the total sectional area of the
tyre cavity, and the radially inner groove (7) forms
a radially inner space (10) extending
circumferentially of the tyre having a cross
sectional area (Si) of from 10 to 25 % of the total
sectional area (S) of the tyre cavity.
Claim 3
Dependent Claim
56 words
A run-flat tyre system according to claim 2,
characterised in that the radially outer space (9)
has a section height (Ho) being less than 20 % of
the section height (H) of the tyre cavity, and the
radially inner space (10) has a section height (Hi)
being 27 to 45 % of the section height (H).
Claim 4
Dependent Claim
25 words
A run-flat tyre system according to claim 1, 2
or 3, characterised in that the radially outer
groove (6) has a substantially U-shaped cross
section.
Claim 5
Dependent Claim
26 words
A run-flat tyre system according to claim 1, 2,
3 or 4, characterised in that the radially inner
groove (7) has a substantially V-shaped cross
section.
Claim 6
Dependent Claim
26 words
A run-flat tyre system according to claim 1, 2,
3 or 4, characterised in that the radially inner
groove (7) has a substantially U-shaped cross
section.
Claim 7
Dependent Claim
20 words
A run-flat tyre system according to any of the
preceding claims, characterised in that the tyre is
a motorcycle tyre.
Claim 8
Dependent Claim
38 words
A run-flat tyre system according to any of the
preceding claims, characterised in that the tyre
core (5) is made of a butyl rubber compound whose
expansion rate is in the range of from 400 to 1500
%.
Claim 9
Dependent Claim
31 words
A run-flat tyre system according to any of the
preceding claims, characterised in that the surface
of the tyre core (5) has a JIS-C hardness of from 10
to 35 degrees.