US3842883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial-ply tires
Assignee: Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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Filing: 1973-08-16
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Granted: 1974-10-22
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Expires: 1993-08-16
Abstract
Abstract This invention relates to radial-ply tires having a reinforcing belt located below the tread. With a view to improving the lateral stability and resistance at high speed a rubber strip of high modulus of elasticity is applied to the sides of the carcass over part only of the radial dimension or height of the tire so that said rubber strip adheres to the carcass, said strip being made from a rubbery mixture having a high modulus of elasticity, not less than 40kg/cm2 at 100 percent elongation and which incorporates at least 40 parts of carbon black and at least 35 parts of a fine polyolefine powder such as polyethylene, having a molecular weight greater than 500,000. The rubber strip extends from the bead to beyond the middle height of the section of the tire over at least 2/3 of the height of the side, and the remaining part of the side of the carcass between the upper edge of the said strip and the edge of the belt is coated with rubbery mixture having a lower modulus of elasticity in order to form a supple bending zone.
Inventors
- 👤 Y Masson
- 👤 H Greiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:38
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/18; B; B60; B60C; B60C11/00; B60C11/03; B60C11/0306; B60C11/04; B60C13/00; B60C9/00; B60C9/02; B60C9/14; B60C9/18; B60C9/20; B60C11/0008; B60C2011/0016; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10855; Y10T152/10864
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
222 words
A pneumatic tire casing comprising two beaded edge portions incorporating reinforcing bead wires, a radial-ply carcass extending between said bead portions and having its edges turned up around said bead wires, a tread portion including a central part and lateral parts applied to the outer part of the side of said carcass, a reinforcing belt located between said tread portion and said carcass and having a width approximately equal to the width of the central part of said tread portion, said lateral parts extending beyond the side edges of said reinforcing belt, said central tread portion and said reinforcing belt being disposed one above the other, and two stiffening side wall strips each applied to the outer face of one side of said carcass and extending radially from a point adjacent the bead edge of said carcass to a point beyond the centre of the height of the tire section and over at least 2/3 of the height of said section, said side wall strips being made from a rubbery mixture having a modulus of elasticity not less than 40 kg/cm2 at 100 percent elongation and which incorporates at least 40 parts of carbon black per 100 parts of rubber, and at least 35 parts per 100 parts of rubber, of a fine polyolefine powder having a molecular weight greater than 500,000.
Claim 2
Dependent Claim
222 words
A pneumatic tire casing comprising two beaded edge portions incorporating reinforcing bead wires, a radial-ply carcass extending between said bead portions and having its edges turned up around said bead wires, a tread portion including a central part and lateral parts applied to the outer part of the side of said carcass, a reinforcing belt located between said tread portion and said carcass and having a width approximately equal to the width of the central part of said tread portion, said lateral parts extending beyond the side edges of said reinforcing belt, said central tread portion and said reinforcing belt being disposed one above the other, and two stiffening side wall strips each applied to the outer face of one side of said carcass and extending radially from a point adjacent the bead edge of said carcass to a point beyond the centre of the height of the tire section and over at least 2/3 of the height of said section, said side wall strips being made from a rubbery mixture having a modulus of elasticity not less than 40 kg/cm2 at 100 percent elongation and which incorporates at least 40 parts of carbon black per 100 parts of rubber, and at least 35 parts per 100 parts of rubber, of a fine polyolefine powder having a molecular weight greater than 500,000.
Claim 3
Dependent Claim
60 words
A pneumatic tire casing, according to claim 1, wherein at least said lateral parts of said tread portion are made from a rubbery material having a modulus of elasticity not greater than 25 kg/cm2 at 100 percent elongation so that said lateral parts of said tread portion form a limited supple flexion zone on each side of said reinforcing belt.
Claim 4
Dependent Claim
29 words
A pneumatic tire casing according to claim 2, wherein said lateral parts extend beyond said side edges of said reinforcing belt for a distance of at least 1.5 cm.
Claim 5
Dependent Claim
13 words
A pneumatic tire casing according to claim 1, wherein said polyolefine is polyethylene.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |