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US4278726A
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Energy absorbing elements comprising rigid non-elastomeric layer and visco-elastic layer with twisted fiber bundles embedded therein
Assignee: Bekaert NV SA
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Filing: 1979-09-24
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Granted: 1981-07-14
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Expires: 1999-09-24
Abstract
Abstract An energy absorbing element such as a spring, shock absorber or vibration damper in the form of a laminated structure comprising at least one rigid non-elastomeric layer such as a reinforced plastic material bonded to a visco-elastic layer such as a vulcanizable elastomer in which twisted fiber bundles are embedded in the visco-elastic layer. Preferably the twisted fiber bundle comprises a steel cord having an elongation at rupture between 1.5 and 8%. An anchoring layer between the visco-elastic layer and the non-elastomeric layer may be employed.
Inventors
- 👤 Andre Wieme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:20
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/366; F16F1/368; A; A63; A63C; A63C5/00; A63C5/06; A63C5/075; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/083; B29C70/086; B29C70/10; B29C70/16; B60; B60G; B60G11/00; B60G11/02; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/98; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29K2305/00; B29K2305/08; B29K2305/12; B29L; B29L2031/00; B29L2031/774; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/24995
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
An energy absorbing element such as a spring, shock absorber or vibration damper in the form of a laminated structure comprising at least one rigid non-elastomeric layer bonded to a visco-elastic layer, wherein twisted fibre bundles are embedded in said visco-elastic layer.
Claim 2
Dependent Claim
42 words
An energy absorbing element such as a spring, shock absorber or vibration damper in the form of a laminated structure comprising at least one rigid non-elastomeric layer bonded to a visco-elastic layer, wherein twisted fibre bundles are embedded in said visco-elastic layer.
Claim 3
Dependent Claim
14 words
An element according to claim 1 wherein the visco-elastic material is a vulcanizable elastomer.
Claim 4
Dependent Claim
28 words
An element according to claim 1 wherein the visco-elastic material comprises at least one twisted fibre bundle with an elongation at rupture of not more than about 10%.
Claim 5
Dependent Claim
24 words
An element according to claim 3 wherein the twisted fibre bundle is steel cord with an elongation at rupture between about 1.5% and 8%.
Claim 6
Dependent Claim
15 words
An element according to claim 3 wherein the non-elastomeric layer is a reinforced plastic material.
Claim 7
Dependent Claim
18 words
An element according to claim 5 including an anchoring layer between the visco-elastic layer and the non-elastomeric layer.
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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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |