US3963218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle guardrail with metal core
Assignee: Arcelor Luxembourg SA
•
Filing: 1973-06-26
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Granted: 1976-06-15
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Expires: 1993-06-26
Abstract
Abstract A guardrail has a core formed of steel plate, sheet or strip having at least two planar sections lying in mutually intersecting planes. Several intersecting planar steel plates may be welded together in a star-shaped or box-girder configuration. A mass of nonporous synthetic-resin foam surrounds this core to protect it against corrosion. This mass also acts as a cushion and serves to stiffen the rail. The steel members have a thickness between 0.2 and 2.5 mm thick, and the synthetic-resin sheath is a polyurethane structure foam with a density of between 40 and 100 kg/m 3 .
Inventors
- 👤 Ernest Glaesener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:31
CPC Classifications
E; E01; E01F; E01F15/00; E01F15/02; E01F15/04; E01F15/0453
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
A continuous guardrail assembly comprising: a flexible rail consisting of a core and a sheath, said core comprising a continuous elongated metal core structure of sheet metal of longitudinally extending angularly adjoining plate sections respectively lying in mutually intersecting longitudinal planes, said sheath comprising a continous mass of synthetic-resin foam surrounding said core structure, said structure being fully embedded in said foam mass and said mass completely filling said structure; and a plurality of breakaway posts supporting said structure at predetermined intervals, said core structure and said posts being formed with mating means adapted to enable said structure to receive said posts.
Claim 2
Dependent Claim
102 words
A continuous guardrail assembly comprising: a flexible rail consisting of a core and a sheath, said core comprising a continuous elongated metal core structure of sheet metal of longitudinally extending angularly adjoining plate sections respectively lying in mutually intersecting longitudinal planes, said sheath comprising a continous mass of synthetic-resin foam surrounding said core structure, said structure being fully embedded in said foam mass and said mass completely filling said structure; and a plurality of breakaway posts supporting said structure at predetermined intervals, said core structure and said posts being formed with mating means adapted to enable said structure to receive said posts.
Claim 3
Dependent Claim
18 words
The guardrail defined in claim 1 wherein said core structure is formed of at least one mild-steel plate.
Claim 4
Dependent Claim
28 words
The guardrail defined in claim 2 wherein said core structure is formed of at least two substantially planar plates, said core structure further comprising welds interconnecting said plates.
Claim 5
Dependent Claim
15 words
The guardrail defined in claim 3 wherein said core structure is of generally cruciform section.
Claim 6
Dependent Claim
24 words
The guardrail defined in claim 3 wherein said core structure is of closed section, said core structure enclosing synthetic-resin foam filling said core structure.
Claim 7
Dependent Claim
16 words
The guardrail defined in claim 2 wherein said plate is bent along a longitudinal horizontal axis.
Claim 8
Dependent Claim
15 words
The guardrail defined in claim 1 wherein said foam is of the water-impervious closed-pore type.
Claim 9
Dependent Claim
16 words
The guardrail defined in claim 1, further comprising a synthetic-resin sleeve surrounding and containing said mass.
Claim 10
Dependent Claim
56 words
The guardrail defined in claim 1 wherein said core structure is formed of a pair of steel elements of like section having overlapping ends fastened together, said mass comprising a respective first mass surrounding each one of said elements with the respective end projecting, and a second mass between said first masses and encapsulating said ends.
References Cited (Backward Citations)
US685318A
Cited
US724462A
Cited
US1412096A
Cited
US1526069A
Cited
US2895302A
Cited
US3170967A
Cited
US3484509A
Cited
US3303627A
Cited
US3404526A
Cited
US3480493A
Cited
DE1658664A1
Cited
US3603562A
Cited
US3591144A
Cited
NL7107390A
Cited
DE2028295A1
Cited
US3644168A
Cited
US3765360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |