US5403112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crash impact attenuator constructed from high molecular weight/high density polyethylene
Assignee: Vanderbilt University
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Filing: 1993-09-08
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Granted: 1995-04-04
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Expires: 2013-09-08
Abstract
Abstract A crash impact attenuator including one or more cylinders, each bolted or otherwise connected to the adjacent cylinder and such cylinders being connected to the platform of a service vehicle or to an abutment adjacent a highway wherein the cylinders are constructed from a high molecular weight/high density polyethylene material.
Inventors
- 👤 John F. Carney, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:28
CPC Classifications
E; E01; E01F; E01F15/00; E01F15/14; E01F15/145; E01F15/148; E01F15/146
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A Crash Impact Attenuator including a series of two or more cylinders, each cylinder having an axis and the cylinders positioned in adjacent relation with their axes extending substantially parallel, each cylinder attached to the cylinder(s) adjacent to it, at least one of said cylinders being attached to a roadside barrier and said cylinders supported by a substantially horizontal surface, said axes being substantially perpendicular to said surface, said cylinders manufactured from High Molecular Weight/High Density Polyethylene having a density in the range of 0.94 or higher gms/cc and a molecular weight in the range of 200,000 to 500,000.
Claim 2
Dependent Claim
99 words
A Crash Impact Attenuator including a series of two or more cylinders, each cylinder having an axis and the cylinders positioned in adjacent relation with their axes extending substantially parallel, each cylinder attached to the cylinder(s) adjacent to it, at least one of said cylinders being attached to a roadside barrier and said cylinders supported by a substantially horizontal surface, said axes being substantially perpendicular to said surface, said cylinders manufactured from High Molecular Weight/High Density Polyethylene having a density in the range of 0.94 or higher gms/cc and a molecular weight in the range of 200,000 to 500,000.
Claim 3
Dependent Claim
30 words
The Crash Impact Attenuator as claimed in claim 1 wherein said roadside barrier is a service vehicle and the said surface is a road over which the vehicle is traveling.
Claim 4
Dependent Claim
17 words
The Crash Impact Attenuator as claimed in claim 1 wherein the cylinders are circular in cross section:
Claim 5
Dependent Claim
32 words
The Crash Impact Attenuator as claimed in claim 1 wherein the cylinders have walls with thicknesses in the range of 0.3 to 3 in. and a diameter of 1 to 10 ft.
Claim 6
Dependent Claim
79 words
A crash impact attenuator including at least one cylinder fabricated from high molecular weight/high density polyethylene having a density substantially in the range of 0.94 or higher gms/cc and a molecular weight substantially in the range of 200,000 to 500,000, wherein said at least one cylinder is connected to an impact object, said at least one Cylinder being supported by a substantially horizontal surface, and said at least one cylinder having an axis aligned substantially perpendicularly to said surface.
Claim 7
Dependent Claim
79 words
A crash impact attenuator including at least one cylinder fabricated from high molecular weight/high density polyethylene having a density substantially in the range of 0.94 or higher gms/cc and a molecular weight substantially in the range of 200,000 to 500,000, wherein said at least one cylinder is connected to an impact object, said at least one Cylinder being supported by a substantially horizontal surface, and said at least one cylinder having an axis aligned substantially perpendicularly to said surface.
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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) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |