EP0092282A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A retractable road barrier
Assignee: Individual
•
Filing: 1983-04-14
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Granted: —
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Expires: 2003-04-14
Abstract
Abstract A retractable road barrier comprises a barrier element (5) pivotable about a horizontal axis (6), and an extensible drive mechanism (8), one end of which is anchored pivotally while the other end is connected to an erecting element (11) which co-operates with an erecting surface (12) situated beneath the roadway, and which is also coupled to the first and of a link (13), the other end of which is coupled to the barrier element (5) at a point (15) situated between the hori- zointal axis (6) and the opposite end (16) thereof.
Inventors
- 👤 Pieter Arie Jan Eikelenboom
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 14:57
CPC Classifications
E; E01; E01F; E01F13/00; E01F13/04; E01F13/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
A retractable road barrier comprising a barrier element pivotable about a first horizontal axis, characterised by an extensible drive mechanism (8), one end of which is pivotally about a second axis (9), situated beneath and parallel to the first axis, anchored while the other end is connected to an erecting element (11) which co-operates with an erecting surface (12) situated beneath the roadway and which rises towards the two said axes, and is also coupled pivoting about a third axis (14) parallel to the first and second axes, to the first end of a link (13), the other end of which is coupled, pivoting about a fourth axis (15) parallel to the other axes, to the barrier element (5) at a point situated between the first pivot axis and the end thereof.
Claim 2
Dependent Claim
132 words
A retractable road barrier comprising a barrier element pivotable about a first horizontal axis, characterised by an extensible drive mechanism (8), one end of which is pivotally about a second axis (9), situated beneath and parallel to the first axis, anchored while the other end is connected to an erecting element (11) which co-operates with an erecting surface (12) situated beneath the roadway and which rises towards the two said axes, and is also coupled pivoting about a third axis (14) parallel to the first and second axes, to the first end of a link (13), the other end of which is coupled, pivoting about a fourth axis (15) parallel to the other axes, to the barrier element (5) at a point situated between the first pivot axis and the end thereof.
Claim 3
Dependent Claim
23 words
A road barrier according to claim 1, characterised in that the drive mechanism (8) is a ram actuated by a medium under pressure.
Claim 4
Dependent Claim
43 words
A road barrier according to claim 2, characterised in that the, elongate, erecting element (11) is connected at its center to a piston rod (10) of the ram (8) and is at each of the two ends pivotably connected to a link (13).
Claim 5
Dependent Claim
26 words
A road barrier according to claims 1 to 3, characterised in that the erecting surface (12) merges, at the highest point, into a flat portion (12a).
Claim 6
Dependent Claim
29 words
A road barrier according to claims 1 to 4, characterised in that the erecting element (11) is coupled to at least one abutment (17) engaging beneath the erecting surface.
Claim 7
Dependent Claim
24 words
A road barrier according to claims 1 to 5, characterised by a compensating spring (18) placed between the barrier element (15) and the frame.
References Cited (Backward Citations)
US1497073A
Cited
US1765906A
Cited
US3141639A
Cited
GB1109257A
Cited
GB1193901A
Cited
US3503480A
Cited
GB2014220A
Cited
GB2079356A
Cited
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