Patent US3892269A successfully refreshed from Google Patents.
US3892269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire
Assignee: Dunlop Holdings Ltd
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Filing: 1973-07-13
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Granted: 1975-07-01
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Expires: 1993-07-13
Abstract
Abstract A pneumatic tire having in the outer region of each of the sidewalls an annular layer of soft rubber, said soft rubber having a hardness of 45 BSI or softer. The annular layer of soft rubber can be on the inside or the outside of the carcass.
Inventors
- 👤 Leslie Vernon Powell
- 👤 Reginald Harold Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:27
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/02; B60C9/14; B60C13/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A pneumatic tire and wheel assembly capable of being run in a deflated condition having a single inflation chamber comprising: a. a wheel having a wheel rim with a pair of annular flanges; b. a pneumatic tire comprising sidewall portions and a tread portion whose width is greater than the width of the wheel rim measured between the flanges; c. means to prevent the tire from becoming dislodged from the wheel when running deflated; d. a lubricant which, when the assembly is used with the tire in a deflated condition, will facilitate relative movement of contacting interior surfaces of the tire; and e. means to facilitate folding between said sidewall portions and tread portion, said means comprising an annular layer of soft rubber having a thickness of at least 1 mm extending over a major proportion of the outer region of each of the sidewall portions, said soft rubber having a hardness of B.S.I. P.S.I. or softer, the outer region of each sidewall being free of discontinuities of thickness which lead to concentration of stresses during severe flexing.
Claim 2
Dependent Claim
178 words
A pneumatic tire and wheel assembly capable of being run in a deflated condition having a single inflation chamber comprising: a. a wheel having a wheel rim with a pair of annular flanges; b. a pneumatic tire comprising sidewall portions and a tread portion whose width is greater than the width of the wheel rim measured between the flanges; c. means to prevent the tire from becoming dislodged from the wheel when running deflated; d. a lubricant which, when the assembly is used with the tire in a deflated condition, will facilitate relative movement of contacting interior surfaces of the tire; and e. means to facilitate folding between said sidewall portions and tread portion, said means comprising an annular layer of soft rubber having a thickness of at least 1 mm extending over a major proportion of the outer region of each of the sidewall portions, said soft rubber having a hardness of B.S.I. P.S.I. or softer, the outer region of each sidewall being free of discontinuities of thickness which lead to concentration of stresses during severe flexing.
Claim 3
Dependent Claim
60 words
A pneumatic tire and wheel assembly according to claim 1 in which the layer of soft rubber is located substantially radially outwardly of a point lying radially outwardly of mid-sidewall by the amount of about 1/8 of the total sectional height of the moulded tire measured from the bead base to the peak of the crown of the tire tread.
Claim 4
Dependent Claim
25 words
A pneumatic tire and wheel assembly according to claim 1 in which the annular layer of applied rubber is located outwardly of the carcass sidewall.
Claim 5
Dependent Claim
29 words
A pneumatic tire and wheel assembly according to claim 1 in which the annular layer of soft rubber is located on the inner liner side of the carcass sidewall.
Claim 6
Dependent Claim
20 words
A pneumatic tire and wheel assembly according to claim 1 having an aspect ration between 30 percent and 75 percent.
Claim 7
Dependent Claim
22 words
A pneumatic tire and wheel assembly according to claim 5 in which the aspect ratio is between 55 percent and 70 percent.
Claim 8
Dependent Claim
30 words
A pneumatic tire and wheel assembly according to claim 1 in which the soft rubber has a high resistance to flow cracking at temperatures in the range 100*C to 140*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |