US6116308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Run-flat tire system
Assignee: Sumitomo Rubber Industries Ltd
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Filing: 1998-07-29
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Granted: 2000-09-12
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Expires: 2018-07-29
Abstract
Abstract A run-flat tire system comprising a tire and an tire core disposed therein, the tire core being an annular body of an elastic closed-cell material, the radially outside and inside of the tire core each provided with a circumferentially extending groove, the radially inner groove extending radially outwardly beyond a bead core line being drawn between the centers of the bead cores. When the tire is mounted on a standard rim, the radially outer groove forms a radially outer space extending circumferentially of the tire and having a cross sectional area of from 1 to 6% of the total sectional area of the tire cavity, and the radially inner groove forms a radially inner space extending circumferentially of the tire having a cross sectional area Si of from 10 to 25% of the total sectional area S of the tire cavity.
Inventors
- 👤 Shu Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:58
CPC Classifications
B; B60; B60C; B60C17/00; B60C17/04; B60C17/06; B60C17/065; B60C17/10; B60C5/00; B60C5/002; B60C2200/00; B60C2200/12; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10036; Y10T152/10054; Y10T152/10279; Y10T152/10378; Y10T152/10387; Y10T152/10396; Y10T152/10405; Y10T152/1045; Y10T152/10459; Y10T152/10468; Y10T152/10486
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
179 words
A run-flat tire system comprising a tire and a tire core disposed therein, the tire comprising a tread portion, a pair of sidewall portions and a pair of axially spaced bead portions with a bead core therein and having a toroidal shape, the tire core being an annular body of an elastic closed-cell material, the radially outside and inside of the tire core each provided with a circumferentially extending groove, the radially inner groove extending radially outwardly beyond a bead core line, the bead core line defined as a straight axial line drawn between the centers of the bead cores, and wherein when the tire is mounted on a standard rim, the radially outer groove forms a radially outer space extending circumferentially of the tire and having a cross-sectional area of from 1 to 6% of the total sectional area of the tire cavity, and the radially inner groove forms a radially inner space extending circumferentially of the tire having a cross-sectional area (Si) of from 10 to 25% of the total sectional area (S) of the tire cavity.
Claim 2
Dependent Claim
179 words
A run-flat tire system comprising a tire and a tire core disposed therein, the tire comprising a tread portion, a pair of sidewall portions and a pair of axially spaced bead portions with a bead core therein and having a toroidal shape, the tire core being an annular body of an elastic closed-cell material, the radially outside and inside of the tire core each provided with a circumferentially extending groove, the radially inner groove extending radially outwardly beyond a bead core line, the bead core line defined as a straight axial line drawn between the centers of the bead cores, and wherein when the tire is mounted on a standard rim, the radially outer groove forms a radially outer space extending circumferentially of the tire and having a cross-sectional area of from 1 to 6% of the total sectional area of the tire cavity, and the radially inner groove forms a radially inner space extending circumferentially of the tire having a cross-sectional area (Si) of from 10 to 25% of the total sectional area (S) of the tire cavity.
Claim 3
Dependent Claim
50 words
The run-flat tire system according to claim 1, wherein the radially outer space has a section height (Ho) being less than 20% of the section height (H) of the tire cavity and the radially inner space has a section height (Hi) being 27 to 45% of the section height (H).
Claim 4
Dependent Claim
19 words
The run-flat tire system according to claim 1, wherein the radially outer groove has a substantially U-shaped cross section.
Claim 5
Dependent Claim
19 words
The run-flat tire system according to claim 1, wherein the radially inner groove has a substantially V-shaped cross section.
Claim 6
Dependent Claim
19 words
The run-flat tire system according to claim 1, wherein the radially inner groove has a substantially U-shaped cross section.
Claim 7
Dependent Claim
15 words
The run-flat tire system according to claim 1, wherein the tire is a motorcycle tire.
Claim 8
Dependent Claim
31 words
The run-flat tire system according to claim 1, wherein the tire core is made of a butyl rubber compound whose expansion rate is in the range of from 400 to 1500%.
Claim 9
Dependent Claim
25 words
The run-flat tire system according to claim 1, wherein the surface of the tire core has a JIS-C hardness of from 10 to 35 degrees.
Claim 10
Dependent Claim
18 words
The run-flat tire system according to claim 2, wherein the radially outer groove has a substantially U-shaped cross-section.
Claim 11
Dependent Claim
18 words
The run-flat tire system according to claim 2, wherein the radially inner groove has a substantially V-shaped cross-section.
Claim 12
Dependent Claim
18 words
The run-flat tire system according to claim 3, wherein the radially inner groove has a substantially V-shaped cross-section.
Claim 13
Dependent Claim
18 words
The run-flat tire system according to claim 2, wherein the radially inner groove has a substantially U-shaped cross-section.
Claim 14
Dependent Claim
18 words
The run-flat tire system according to claim 3, wherein the radially inner groove has a substantially U-shaped cross-section.
Claim 15
Dependent Claim
15 words
The run-flat tire system according to claim 2, wherein the tire is a motorcycle tire.
Claim 16
Dependent Claim
15 words
The run-flat tire system according to claim 3, wherein the tire is a motorcycle tire.
Claim 17
Dependent Claim
31 words
The run-flat tire system according to claim 2, wherein the tire core is made of a butyl rubber compound whose expansion rate is in the range of from 400 to 1500%.
Claim 18
Dependent Claim
31 words
The run-flat tire system according to claim 3, wherein the tire core is made of a butyl rubber compound whose expansion rate is in the range of from 400 to 1500%.
Claim 19
Dependent Claim
25 words
The run-flat tire system according to claim 2, wherein the surface of the tire core has a JIS-C hardness of from 10 to 35 degrees.
Claim 20
Dependent Claim
25 words
The run-flat tire system according to claim 3, wherein the surface of the tire core has a JIS-C hardness of from 10 to 35 degrees.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-09-12 | 2004-03-13 | 2004-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-09-12 | 2008-03-13 | 2008-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-09-12 | 2012-03-13 | 2012-09-12 | $7700.00 | Window Closed / Lapsed |