US4158946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal cord
Assignee: Bekaert NV SA
•
Filing: 1978-07-05
•
Granted: 1979-06-26
•
Expires: 1998-07-05
Abstract
Abstract A metal cord consisting of at least 15 filaments, comprising a core of 2 to 4 filaments twisted together, an intermediate layer wound on the core and in contact therewith and an outer layer of filaments wound on the intermediate layer and in contact therewith, wherein the intermediate and outer layers each have a free space of from 14 to 25%, preferably 20 to 24%.
Inventors
- 👤 Luc Bourgois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:47
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0606; D07B1/062; D07B1/0633; D07B1/0626; D07B2201/00; D07B2201/20; D07B2201/2015; D07B2201/2023; D07B2201/2024; D07B2201/2029; D07B2201/203; D07B2201/2095; D07B2201/2097; Y; Y10; Y10S; Y10S57/00; Y10S57/902
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
A metallic reinforcement cord for radial tires comprising at least 15 filaments, all made of the same material and having the same modulus of elasticity, the filaments being combined into a core of 2 to 4 filaments stranded together, an intermediate layer wound on said core and in contact therewith with a substantial contact pressure, and an outer layer of filaments wound on said intermediate layer and in contact therewith with a substantial contact pressure, wherein the intermediate and outer layer have a free space of from 14 to 25% allowing rubber penetration into the core during vulcanization.
Claim 2
Dependent Claim
98 words
A metallic reinforcement cord for radial tires comprising at least 15 filaments, all made of the same material and having the same modulus of elasticity, the filaments being combined into a core of 2 to 4 filaments stranded together, an intermediate layer wound on said core and in contact therewith with a substantial contact pressure, and an outer layer of filaments wound on said intermediate layer and in contact therewith with a substantial contact pressure, wherein the intermediate and outer layer have a free space of from 14 to 25% allowing rubber penetration into the core during vulcanization.
Claim 3
Dependent Claim
38 words
A metallic reinforcement cord as claimed in claim 1 wherein the core consists of two filaments, the intermediate layer of 7 filaments and the outer layer of 12 filaments, all filaments being substantially identical in size and properties.
Claim 4
Dependent Claim
49 words
A metallic reinforcement cord as claimed in claim 1, wherein the core consists of three filaments, the intermediate layer consists of 8 filaments, the outer layer consists of 12 filaments, all filaments being substantially identical in properties and size and having a size that is smaller than 0.25 mm.
Claim 5
Dependent Claim
49 words
A metallic reinforcement cord as claimed in claim 1, wherein the core consists of four filaments, the intermediate layer consists of 8 filaments and the outer layer of 12 filaments, all filaments being substantially identical in properties and size and having a size that is smaller than 0.18 mm.
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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) | 1982-06-25 | 1982-12-25 | 1983-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-25 | 1986-12-25 | 1987-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-25 | 1990-12-25 | 1991-06-26 | $7700.00 | Window Closed / Lapsed |