Patent US3850220A successfully refreshed from Google Patents.
US3850220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divided rim and tire assemblies
Assignee: Dunlop Ltd
•
Filing: 1973-05-04
•
Granted: 1974-11-26
•
Expires: 1993-05-04
Abstract
Abstract A tire bead retaining member for a pneumatic tire and divided rim assembly comprising an annular band of sheet material having a diameter and width such as to enable the band to be fitted around the base portion of the rim to engage and hold in spacedapart relationship the beads of an associated tire. The sides of the band are provided with radially outwardly formed flanges which abut the tire beads to form an air-tight seal for the inflation chamber of the tire. A plunger valve and lubricant enclosing means is positioned within the band and is arranged to release lubricant into the inflation chamber of the tire in the event of the tire becoming deflated.
Inventors
- 👤 W Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:51
CPC Classifications
B; B60; B60C; B60C5/00; B60C5/12; B60C5/16; B60C15/00; B60C15/02; B60C15/028; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10738
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
155 words
A tire bead retaining member for a pneumatic tire and divided rim assembly comprising an annular band of sheet material having a diameter and width such as to enable the band to be fitted around the base portion of the rim to engage and hold in spacedapart relationship the beads of an associated tire seated on the rim, the annular band having a single corrugation projecting radially outwardly from the rim into the inflation chamber of the tire to act as a support for the interior surface of the tire tread when run in a deflated condition and extending circumferentially around the rim, the sides of the corrugation being provided with radially outwardly turned flanges, one at each side, each flange being smoothly curved so as to present a convex sealing surface to its respective tire bead in the toe region thereof and to form an air-tight seal for the inflation chamber of the tire.
Claim 2
Dependent Claim
155 words
A tire bead retaining member for a pneumatic tire and divided rim assembly comprising an annular band of sheet material having a diameter and width such as to enable the band to be fitted around the base portion of the rim to engage and hold in spacedapart relationship the beads of an associated tire seated on the rim, the annular band having a single corrugation projecting radially outwardly from the rim into the inflation chamber of the tire to act as a support for the interior surface of the tire tread when run in a deflated condition and extending circumferentially around the rim, the sides of the corrugation being provided with radially outwardly turned flanges, one at each side, each flange being smoothly curved so as to present a convex sealing surface to its respective tire bead in the toe region thereof and to form an air-tight seal for the inflation chamber of the tire.
Claim 3
Dependent Claim
37 words
A tire bead retaining member according to claim 1 wherein the band is constructed of heavy gauge sheet material to render the band strong in the axial direction, while the corrugation permits a degree of axial resilience.
Claim 4
Dependent Claim
31 words
A tire bead retaining member according to claim 1 wherein an inflation valve connection is secured in an aperture provided in a flattened portion provided in the peak of the corrugation.
Claim 5
Dependent Claim
39 words
A tire bead retaining member according to claim 1 wherein a lubricant container is mounted On the annular band, means being provided to release lubricant contained in said container in the event of deflation of the associated pneumatic tire.
Claim 6
Dependent Claim
58 words
A tire bead retaining member according to claim 4 wherein the lubricant releasing means comprises a plunger valve spring-loaded to a closed position within a valve body member said plunger valve being arranged to be displaced once in every revolution of the associated wheel when the tire is in the deflated state to release lubricant from the container.
Claim 7
Dependent Claim
77 words
A tire bead retaining member according to claim 5 wherein the lubricant container comprises two pieces of rubber or plastics tubing attached one to each side of the valve body member and arranged to extend around the circumference of the rim within the band, the ends of the pieces of tubing remote from the valve being sealed and the plunger valve being arranged to release the contents of the pieces of tubing when the valve is displaced.
Claim 8
Dependent Claim
26 words
A tire bead retaining member according to claim 6 wherein the ends of the pieces of tubing remote from the valve are plugged and secured together.
Claim 9
Dependent Claim
61 words
A tire bead retaining member according to claim 6 wherein the valve body member comprising a cavity which is closed at one end and is provided with side connections to the container, the valve body member having an open portion inserted through an aperture in the crown of the retaining band and located therein by means of a cap secured thereon.
Claim 10
Dependent Claim
42 words
A tire bead retaining member according to claim 8 wherein the plunger valve comprises a valve member of conical cross-section which is arranged to be in springloaded contact against a valve seat defined by a tapered aperture provided in the cap portion.
Claim 11
Independent Claim
149 words
A device for holding a lubricant container in a pneumatic tire and retaining tire beads on a divided rim assembly comprising: a. an annular band of sheet material having a diameter and width such as to enable the band to be fitted around the base portion of the rim to engage and hold in spaced-apart relationship the beads of a tire seated on the rim, the sides of the annular band having radially outwardly turned flanges, each flange being curved to present a convex sealing surface to its respective tire bead to form an airtight seal therewith; b. a lubricant container mounted on the annular band and means to release the lubricant comprising a plunger valve spring-loaded to a closed position on a valve body member, said plunger being displaceable to an open position once every revolution of the wheel when the tire is run in a deflated condition.
Claim 12
Independent Claim
149 words
A device for holding a lubricant container in a pneumatic tire and retaining tire beads on a divided rim assembly comprising: a. an annular band of sheet material having a diameter and width such as to enable the band to be fitted around the base portion of the rim to engage and hold in spaced-apart relationship the beads of a tire seated on the rim, the sides of the annular band having radially outwardly turned flanges, each flange being curved to present a convex sealing surface to its respective tire bead to form an airtight seal therewith; b. a lubricant container mounted on the annular band and means to release the lubricant comprising a plunger valve spring-loaded to a closed position on a valve body member, said plunger being displaceable to an open position once every revolution of the wheel when the tire is run in a deflated condition.
Claim 13
Dependent Claim
74 words
A member according to claim 10 wherein the lubricant container comprises two pieces of rubber or plastics tubing attached one to each side of the valve body member and arranged to extend around the circumference of the rim within the band, the ends of the pieces of tubing remote from the valve being sealed and the plunger valve being arranged to release the contents of the pieces of tubing when the valve is displaced.
Claim 14
Dependent Claim
26 words
A tire bead retaining member according to claim 11 wherein the ends of the pieces of tubing remote from the valve are plugged and secured together.
Claim 15
Dependent Claim
58 words
A tire bead retaining member according to claim 11 wherein the valve body member comprising a cavity which is closed at one end and is provided with side connections to the container, the valve body member having an open portion inserted through an aperture in the retaining band and located therein by means of a cap secured thereon.
Claim 16
Dependent Claim
42 words
A tire bead retaining member according to claim 13 wherein the plunger valve comprises a valve member of conical cross-section which is arranged to be in spring-loaded contact against a valve seat defined by a tapered aperture provided in the cap portion.
References Cited (Backward Citations)
US1621021A
Cited
US2399572A
Cited
US2731062A
Cited
US2857951A
Cited
US3638701A
Cited
US3610308A
Cited
US3739829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |