US4710423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Woven polyester webbing for safety belts
Assignee: Teijin Ltd
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Filing: 1986-11-10
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Granted: 1987-12-01
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Expires: 2006-11-10
Abstract
Abstract A webbing useful for safety belts having an excellent impact energy absorption and a superior impact strength, comprises a webbing made by weaving warps and wefts, at least the warps consisting of polyester filaments which have an intrinsic viscosity of 0.7 or more, a birefringence of 0.08 to 0.15, a tensile strength of 4 g/denier or more, an ultimate elongation of from 50% to 80%, and an elongation value of 5% or less at a point A in a stress-strain curve of the filaments, which point A denotes an intersection point of an extension of a steeply sloped portion of the curve appearing at the initial stage of the elongation of the filaments with an extension of a substantially horizontal or gently sloped portion of the curve appearing at the middle stage of the elongation of the filaments.
Inventors
- 👤 Tosuke Imamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:56
CPC Classifications
D; D03; D03D; D03D1/00; D03D1/0005; D03D15/00; D03D15/20; D03D15/283; D03D15/40; D03D15/41; D03D15/50; D03D15/547; D03D15/573; D10; D10B; D10B2331/00; D10B2331/04; D10B2505/00; D10B2505/12; D10B2505/122; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2861; Y10T442/30; Y10T442/3179; Y10T442/322; Y10T442/3228; Y10T442/326; Y10T442/3285
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A webbing useful for safety belts comprising a woven belt composed of warps and wefts, and characterized in that at least the warps consist of polyester filament yarns having an intrinsic viscosity of 0.7 or more, a birefringence of from 0.08 to 0.15, a tensile strength of 4 g/denier or more, an ultimate elongation of from 50% to 80% and an elongation of 5% or less at a point A in a tensile stress-strain curve of the yarns, which point A denotes an intersecting point of an extension line from a steeply sloped portion of the curve appearing at an initial stage of the elongation of the yarns with an extension line from a substantially horizontal or slightly sloped portion of the curve appearing at an middle stage of the elongation of the yarns.
Claim 2
Dependent Claim
134 words
A webbing useful for safety belts comprising a woven belt composed of warps and wefts, and characterized in that at least the warps consist of polyester filament yarns having an intrinsic viscosity of 0.7 or more, a birefringence of from 0.08 to 0.15, a tensile strength of 4 g/denier or more, an ultimate elongation of from 50% to 80% and an elongation of 5% or less at a point A in a tensile stress-strain curve of the yarns, which point A denotes an intersecting point of an extension line from a steeply sloped portion of the curve appearing at an initial stage of the elongation of the yarns with an extension line from a substantially horizontal or slightly sloped portion of the curve appearing at an middle stage of the elongation of the yarns.
Claim 3
Dependent Claim
55 words
The webbing as claimed in claim 1, wherein the warps are in a warp density of 320 to 400 yarns/50 mm and each have a yarn denier of 1,000 to 1,500, and the wefts are in a weft density of 15 to 25 yarns/2.54 cm and each have a yarn denier of 500 to 750.
Claim 4
Dependent Claim
15 words
The webbing as claimed in claim 1, wherein the wefts consist of ordinary polyester filaments.
Claim 5
Dependent Claim
21 words
The webbing as claimed in claim 1, wherein the wefts consist of the same polyester filaments as those of the warps.
Claim 6
Dependent Claim
23 words
A safety belt comprising the webbing as claimed in claim 1, the webbing having been dyed and finished with a resinous finishing agent.
References Cited (Backward Citations)
US4386943A
Cited
US4388364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |