Patent US2615826A successfully refreshed from Google Patents.
US3907019A
Expired / Lapsed
US
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Tire treads made of an oriented elastomer mixture
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1974-05-02
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Granted: 1975-09-23
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Expires: 1994-05-02
Abstract
Abstract An elastomer mixture is stretched to produce molecular orientation and wound onto a tire carcass in a series of turns to produce a tire tread. The tire is then vulcanized. The orientation, which survives the vulcanization, improves tread life and provides other benefits.
Inventors
- 👤 Jean Bernard Montagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:39
CPC Classifications
B; B60; B60C; B60C11/00; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/58; B60C1/00; B29D30/38; B29D30/44; B29D2030/4437; B29D2030/4443; B29D2030/445; B60C11/0008; B60C2011/0016; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A pneumatic tire comprising a carcass, a carcass reinforcement reinforcing said carcass, bead wires anchoring opposite ends of said carcass reinforcement, a tread, and a tread reinforcement reinforcing said tread, said tread having a surface that makes contact with the ground in a tire footprint area during rolling of the tire, said tread being formed of a vulcanized elastomer mixture, the elastomer of said elastomer mixture having been stretched in the unvulcanized state beyond its elastic limit in thin sheets and being oriented in a direction which is parallel to said surface of said tread and having a modulus of elasticity, rupture strength, elongation at rupture, electrical resistivity, and hysteresis which are different in different directions.
Claim 2
Dependent Claim
116 words
A pneumatic tire comprising a carcass, a carcass reinforcement reinforcing said carcass, bead wires anchoring opposite ends of said carcass reinforcement, a tread, and a tread reinforcement reinforcing said tread, said tread having a surface that makes contact with the ground in a tire footprint area during rolling of the tire, said tread being formed of a vulcanized elastomer mixture, the elastomer of said elastomer mixture having been stretched in the unvulcanized state beyond its elastic limit in thin sheets and being oriented in a direction which is parallel to said surface of said tread and having a modulus of elasticity, rupture strength, elongation at rupture, electrical resistivity, and hysteresis which are different in different directions.
Claim 3
Dependent Claim
20 words
A pneumatic tire according to claim 1 wherein said elastomer is oriented in a direction extending circumferentially of said tread.
Claim 4
Dependent Claim
22 words
A pneumatic tire according to claim 1 wherein said elastomer mixture comprises a plurality of laminated layers extending circumferentially of said tire.
Claim 5
Dependent Claim
39 words
A pneumatic tire according to claim 1 wherein said elastomer mixture comprises a plurality of laminated layers extending circumferentially of said tire and wherein the thickness of said layers is within the range of 0.1 mm to 5.0 mm.
Claim 6
Independent Claim
74 words
A method of manufacturing pneumatic tires comprising the steps of providing a carcass, providing a carcass reinforcement foR said carcass, providing bead wires anchoring opposite ends of said carcass reinforcement, providing an elastomer mixture for application to said carcass to form a tread, stretching said elastomer mixture beyond the elastic limit thereof to effect a greater elongation of said elastomer mixture than the final elongation thereof desired, permitting partial contraction of said elastomer mixture.
Claim 7
Independent Claim
74 words
A method of manufacturing pneumatic tires comprising the steps of providing a carcass, providing a carcass reinforcement foR said carcass, providing bead wires anchoring opposite ends of said carcass reinforcement, providing an elastomer mixture for application to said carcass to form a tread, stretching said elastomer mixture beyond the elastic limit thereof to effect a greater elongation of said elastomer mixture than the final elongation thereof desired, permitting partial contraction of said elastomer mixture.
Claim 8
Dependent Claim
36 words
A method according to claim 5 comprising the steps of winding said elastomer mixture onto said carcass circumferentially of said carcass in a plurality of turns and effecting said stretching in the direction of said winding.
Claim 9
Dependent Claim
25 words
A method according to claim 5 comprising the step of effecting said stretching at the moment of application of said elastomer mixture to said carcass.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |