US4067373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tires
Assignee: Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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Filing: 1975-09-22
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Granted: 1978-01-10
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Expires: 1995-09-22
Abstract
Abstract A tire for a motor vehicle having a radial carcass and a top belt construction which includes a filler section in the lower portion or flange portion of each sidewall. The filler section is positioned between a portion of the carcass and folded over edges of the carcass and is comprised of a rubber material having a dynamic modulus at least about 200 kg/cm 2 and a relatively low hysteresis or a loss angle on the order of from about 7° to 13°.
Inventors
- 👤 Emile-Jean Delobelle
- 👤 Francois Madec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:24
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/06; B60C13/00; B60C13/04; Y; Y10; Y10S; Y10S152/00; Y10S152/12; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10819; Y10T152/10837; Y10T152/10846
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
200 words
A tire of the type having a radial carcass and a top belt for vehicles, which comprises a tread, sidewalls and beads, each flange portion of a sidewall having a filler section made from a hard rubber material surmounting the bead, said filler section being positioned between a portion of the carcass and folded-over edges of the carcass and comprising a rubbery material which is a rubbery mixture containing for 100 parts of natural or synthetic elastomer, from 50 to 90 parts of carbon black and from 20 to 50 parts of polyethylene or polypropylene having a high molecular weight of at least 500,000, said rubbery material having at the same time a dynamic modulus of at least about 200 kg/cm 2 and a low hysteresis expressed by a low loss angle on the order of from about 7° to 13° and said sidewalls each having an exterior portion extending from a rim portion of the tire to the exterior lateral edges of the sides of the tread, each portion comprising a non-reinforced flexible rubbery material having a Shore hardness A of approximately 60 and a medium modulus of elasticity on the order of 15 kg/cm 2 at 100% elongation.
Claim 2
Dependent Claim
200 words
A tire of the type having a radial carcass and a top belt for vehicles, which comprises a tread, sidewalls and beads, each flange portion of a sidewall having a filler section made from a hard rubber material surmounting the bead, said filler section being positioned between a portion of the carcass and folded-over edges of the carcass and comprising a rubbery material which is a rubbery mixture containing for 100 parts of natural or synthetic elastomer, from 50 to 90 parts of carbon black and from 20 to 50 parts of polyethylene or polypropylene having a high molecular weight of at least 500,000, said rubbery material having at the same time a dynamic modulus of at least about 200 kg/cm 2 and a low hysteresis expressed by a low loss angle on the order of from about 7° to 13° and said sidewalls each having an exterior portion extending from a rim portion of the tire to the exterior lateral edges of the sides of the tread, each portion comprising a non-reinforced flexible rubbery material having a Shore hardness A of approximately 60 and a medium modulus of elasticity on the order of 15 kg/cm 2 at 100% elongation.
Claim 3
Dependent Claim
51 words
A tire according to claim 1, in which the edges of the carcass are folded over from the inside toward the outside in such a manner as to be raised above an upper edge of the filler section up to about one-half of the height of the sidewall of the tire.
Claim 4
Dependent Claim
37 words
A tire according to claim 2, in which at least one sidewall comprises a band of rubber in white color and in which the folded-over edges of the carcass extend between the band and the filler section.
Claim 5
Dependent Claim
28 words
A tire according to claim 3, in which the filler section extends upwards from the bead to a position at least about one-third the height of the sidewall.
Claim 6
Dependent Claim
29 words
A tire according to claim 1, in which the filler section is at least partially encompassed by said portion of said carcass and the folded-over edges of said carcass.
Claim 7
Dependent Claim
30 words
A tire according to claim 1, in which said carcass is made up of at least one ply of cords or cable oriented along the meridian planes of the tire.
Claim 8
Dependent Claim
24 words
A tire according to claim 1, in which a portion of the filler section is covered with a rim rubber material resistant to abrasion.
Claim 9
Dependent Claim
63 words
A tire according to claim 1, in which the filler section extends upward from the bead to a position at least about one-third the height of the sidewall and the folded-over edges of the carcass are turned up around the bead from the inside toward the outside in such a manner as to be raised above an upper edge of the filler section.
Claim 10
Dependent Claim
24 words
A tire according to claim 1, in which each flange portion of a sidewall has a single filler section comprised of said rubbery material.
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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |