Patent US6010275A successfully refreshed from Google Patents.
US6010275A
Expired / Lapsed
US
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Compression Guardrail
Assignee: Individual
•
Filing: 1997-08-25
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Granted: 2000-01-04
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Expires: 2017-08-25
Abstract
Abstract An impact attenuating guardrail including a rail extending longitudinally along a roadway, a plurality of fixed support posts spaced behind the rail, and resilient compressible energy absorbing means mounted between the rail and the posts.
Inventors
- 👤 John C. Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:51
CPC Classifications
E; E01; E01F; E01F15/00; E01F15/02; E01F15/04; E01F15/0407; E01F15/0438
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
An impact attenuating guardrail comprising rail means extending longitudinally along a roadway and having a substantial vertical height at least equal to the height of the center of gravity of an errant vehicle leaving the roadway at a high speed, said rail means adapted to intercept and redirect the errant vehicle back onto the roadway, fixed obstacle means spaced from said rail means, energy absorbing means mounted between said rail means and said obstacle means permitting displacement of said rail means away from the roadway upon impact by said errant vehicle, said energy absorbing means including at least one resilient cylindrical member of high molecular weight, high density polyethylene and having a vertical height sufficient to support said rail means substantially throughout its vertical height.
Claim 2
Dependent Claim
125 words
An impact attenuating guardrail comprising rail means extending longitudinally along a roadway and having a substantial vertical height at least equal to the height of the center of gravity of an errant vehicle leaving the roadway at a high speed, said rail means adapted to intercept and redirect the errant vehicle back onto the roadway, fixed obstacle means spaced from said rail means, energy absorbing means mounted between said rail means and said obstacle means permitting displacement of said rail means away from the roadway upon impact by said errant vehicle, said energy absorbing means including at least one resilient cylindrical member of high molecular weight, high density polyethylene and having a vertical height sufficient to support said rail means substantially throughout its vertical height.
Claim 3
Dependent Claim
40 words
The guard rail defined in claim 1, said obstacle means comprising a plurality of longitudinally spaced vertical posts, and said energy absorbing means comprising at least one resilient cylindrical member mounted between each of said posts and said rail means.
Claim 4
Dependent Claim
37 words
The guardrail defined in claim 1, said obstacle means being a wall, and said energy absorbing means comprising a plurality of said resilient cylindrical members mounted along said rail means between said rail means and said wall.
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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) | 2003-01-03 | 2003-07-05 | 2004-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-03 | 2007-07-05 | 2008-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-03 | 2011-07-05 | 2012-01-04 | $7700.00 | Window Closed / Lapsed |