Patent US5217549A successfully refreshed from Google Patents.
US5217549A
Expired / Lapsed
US
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Pneumatic safety tire
Assignee: Bridgestone Americas Tire Operations LLC
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Filing: 1991-04-04
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Granted: 1993-06-08
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Expires: 2011-04-04
Abstract
Abstract A pneumatic safety tire, of the type preferably having a section height of five inches or greater, having a pair of crescent shaped elastomeric reinforcing members located between the innerliner and side wall and extending from adjacent the tread shoulders to at least the apex of the bead fillers of the tire. A pair of bias reinforcing plies are located between the elastomeric reinforcing members and the side walls of the tire and extend along the side walls from adjacent the tread shoulders to below the top most turn-up ends of the body ply. The elastomeric reinforcing members preferably are similar in composition to that of the bead fillers and have a low hysteresis value preferably within the range of 0.03 and 0.11, a high modulus preferably within the range of 2600 psi and 2800 psi and a Shore A hardness preferably within the range of between 85 and 91. The elastomeric reinforcing members in combination with the reinforcing bias plies, enable a high section height tire to run at high speeds for a relatively long distance in an uninflated condition, and improve the performance of heretofore low section height run flat tires.
Inventors
- 👤 David A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:03
CPC Classifications
B; B60; B60C; B60C13/00; B60C17/00; B60C17/0009; B60C9/00; B60C9/02; B60C9/04; B60C9/08; B60C9/09; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10855; Y10T152/10864
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
192 words
A pneumatic run flat tire of the type having a tread terminating in a pair of shoulders, a pair of side walls, a pair of beads located below the side walls, a pair of bead fillers, at least one body ply having radially oriented reinforcing cords and having turn-up ends extending along the side walls, and an innerliner, including: a pair of generally crescent shaped elastomeric reinforcing members secured between the innerliner and the body ply and extending from the tread to at least the bead fillers, which members are substantially capable of supporting the tire in a run flat condition; and a reinforcing ply containing a plurality of generally parallel reinforcing cords coated with rubber located between each of the elastomeric reinforcing members and side walls, the reinforcing cords oriented at a bias with respect to the radially oriented ends of the body ply and terminating at one end inwardly of a respective one of the tread shoulders and extending therefrom a substantial distance along the side walls to at least the turn-up ends of the body ply and in generally continuous contact with said body ply along the reinforcing member.
Claim 2
Dependent Claim
192 words
A pneumatic run flat tire of the type having a tread terminating in a pair of shoulders, a pair of side walls, a pair of beads located below the side walls, a pair of bead fillers, at least one body ply having radially oriented reinforcing cords and having turn-up ends extending along the side walls, and an innerliner, including: a pair of generally crescent shaped elastomeric reinforcing members secured between the innerliner and the body ply and extending from the tread to at least the bead fillers, which members are substantially capable of supporting the tire in a run flat condition; and a reinforcing ply containing a plurality of generally parallel reinforcing cords coated with rubber located between each of the elastomeric reinforcing members and side walls, the reinforcing cords oriented at a bias with respect to the radially oriented ends of the body ply and terminating at one end inwardly of a respective one of the tread shoulders and extending therefrom a substantial distance along the side walls to at least the turn-up ends of the body ply and in generally continuous contact with said body ply along the reinforcing member.
Claim 3
Dependent Claim
21 words
The tire construction defined in claim 1 in which the reinforcing plies are located between the side walls and body ply.
Claim 4
Dependent Claim
23 words
The tire construction defined in claim 1 in which the reinforcing plies are located between the body plies and the elastomeric reinforcing members.
Claim 5
Dependent Claim
19 words
The tire construction defined in claim 1 in which the elastomeric reinforcing members terminate inwardly of the tread shoulders.
Claim 6
Dependent Claim
30 words
The tire construction defined in claim 1 in which the cords of the reinforcing plies are at a bias between -60° and 60° with respect to the body ply cords.
Claim 7
Dependent Claim
23 words
The tire construction defined in claim 1 which the elastomeric reinforcing members are formed of the same compound as are the bead fillers.
Claim 8
Dependent Claim
32 words
The tire construction defined in claim 1 in which the elastomeric reinforcing members have a hysteresis value within the range of 0.03 and 0.20 Tangent Delta at 212° F. and 10 Hz.
Claim 9
Dependent Claim
32 words
The tire construction defined in claim 1 in which the elastomeric reinforcing members have a hysteresis value within the range of 0.03 and 0.11 Tangent Delta at 212° F. and 10 Hz.
Claim 10
Dependent Claim
27 words
The tire construction defined in claim 1 in which the elastomeric reinforcing members have durometer hardness of between 80 and 97 on the Shore A hardness scale.
Claim 11
Dependent Claim
27 words
The tire construction defined in claim 1 which the elastomeric reinforcing members have a durometer hardness of between 85 and 91 on the Shore A hardness scale.
Claim 12
Dependent Claim
37 words
The tire construction defined in claim 1 in which the elastomeric reinforcing members have a modulus within the range of 1800 psi and 4000 psi measured at a run flat condition at approximately the 15% strain range.
Claim 13
Dependent Claim
37 words
The tire construction defined in claim 1 in which the elastomeric reinforcing members have a modulus within the range of 2600 psi and 2800 psi measured at a run flat condition at approximately the 15% strain range.
Claim 14
Dependent Claim
25 words
The tire construction defined in claim 1 in which the tire is a high profile tire having a section height of five inches or greater.
Claim 15
Dependent Claim
24 words
The tire construction defined in claim 1 in which the tire is a low profile tire having a section height of below five inches.
References Cited (Backward Citations)
US3542108A
Cited
US3954131A
Cited
US3911987A
Cited
US4067372A
Cited
US3949798A
Cited
US3983919A
Cited
US4067374A
Cited
US4096899A
Cited
US4365659A
Cited
US4202393A
Cited
US4287924A
Cited
US4261405A
Cited
JPS5568406A
Cited
US4203481A
Cited
US4265280A
Cited
US4287929A
Cited
GB2087805A
Cited
GB2138367A
Cited
US4917164A
Cited
US4779658A
Cited
US4929684A
Cited
EP0371755A2
Cited
EP0385192A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |