US4081014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire and wheel rim assemblies
Assignee: Dunlop Ltd
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Filing: 1976-07-23
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Granted: 1978-03-28
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Expires: 1996-07-23
Abstract
Abstract A pneumatic tire and wheel rim assembly capable of being driven with the tire deflated comprising at least one circumferential band of magnetized rubber or plastics material on an interior surface of the assembly which contacts and is required to move relative to a further such surface when the tire is deflated and a magnetized liquid lubricant maintained in position by the band to facilitate relative movement between the contacting surfaces within the assembly when the assembly is driven with the tire deflated.
Inventors
- 👤 Eric Henry Searle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:34
CPC Classifications
B; B60; B60C; B60C17/00; B60C17/04; B60C17/045; B60C17/10; B60C19/00; B60C2019/005; C; C10; C10M; C10M2201/00; C10M2201/06; C10M2201/062; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
A pneumatic tire and wheel rim assembly capable of being driven with the tire deflated comprising at least one circumferentially extending band of rubber or plastics material containing magnetized particles, said band being on an interior surface of the assembly which contacts and is required to move relative to a further such surface when the tire is deflated and a liquid lubricant containing magnetized particles and maintained in position by the band to facilitate relative movement between the contacting surfaces within the assembly when the assembly is driven with the tire deflated.
Claim 2
Dependent Claim
92 words
A pneumatic tire and wheel rim assembly capable of being driven with the tire deflated comprising at least one circumferentially extending band of rubber or plastics material containing magnetized particles, said band being on an interior surface of the assembly which contacts and is required to move relative to a further such surface when the tire is deflated and a liquid lubricant containing magnetized particles and maintained in position by the band to facilitate relative movement between the contacting surfaces within the assembly when the assembly is driven with the tire deflated.
Claim 3
Dependent Claim
27 words
A pneumatic tire and wheel rim assembly as claimed in claim 1 in which a circumferential band is disposed on the interior surface of the tire sidewall.
Claim 4
Dependent Claim
27 words
A pneumatic tire and wheel rim assembly as claimed in claim 1 in which a circumferential band is disposed on the interior surface of the tire tread.
Claim 5
Dependent Claim
32 words
A pneumatic tire and wheel rim assembly as claimed in claim 1 including an internal annular support upon which the load carried by the assembly will bear when the tire is deflated.
Claim 6
Dependent Claim
29 words
A pneumatic tire and wheel rim assembly as claimed in claim 4 in which a magnetized circumferential band is disposed on the radially outermost surface of the annular support.
Claim 7
Dependent Claim
40 words
A pneumatic tire and wheel rim assembly as claimed in claim 4 in which the annular support is capable of rotation about the wheel rim and a magnetized circumferential band is disposed on the radially innermost surface of the support.
Claim 8
Dependent Claim
23 words
A pneumatic tire and wheel rim assembly as claimed in claim 1 in which the circumferential band comprises barium, lead or zinc ferrites.
Claim 9
Dependent Claim
19 words
A pneumatic tire and wheel rim assembly as claimed in claim 1 in which liquid lubricant is a ferrofluid.
Claim 10
Dependent Claim
87 words
A pneumatic tire capable of being driven in a deflated condition comprising at least one circumferentially extending band of rubber or plastics material containing magnetized particles, said band being on an interior surface of the tire which contacts and is required to move relative to a further such surface when the tire is deflated and a liquid lubricant containing magnetized particles and maintained in position by the band to facilitate relative movement between the contacting surfaces within the tire when it is driven in a deflated condition.
Claim 11
Dependent Claim
87 words
A pneumatic tire capable of being driven in a deflated condition comprising at least one circumferentially extending band of rubber or plastics material containing magnetized particles, said band being on an interior surface of the tire which contacts and is required to move relative to a further such surface when the tire is deflated and a liquid lubricant containing magnetized particles and maintained in position by the band to facilitate relative movement between the contacting surfaces within the tire when it is driven in a deflated condition.
Claim 12
Dependent Claim
22 words
The pneumatic tire of claim 9 in which a circumferentially extending band is disposed on the interior surface of the tire sidewall.
Claim 13
Dependent Claim
22 words
The pneumatic tire of claim 9 in which a circumferentially extending band is disposed on the interior surface of the tire tread.
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) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |