Retractable road barrier

Road structure – process – or apparatus – Traffic steering device or barrier

Reexamination Certificate

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Details

C404S009000, C404S011000, C256S013100

Reexamination Certificate

active

06926462

ABSTRACT:
A safety barrier for road use comprises a barrier element which can be displaced between an operative position, above the road surface, and an inoperative position, in which it does not substantially project above the road surface. Preferably provided is a number of sets of aligned barrier elements, rigidly connected to one another, the adjacent sets being connected together by articulated connecting structures which enable one set of barrier elements to be displaced between its inoperative position and its operative position without modifying the positions of the adjacent sets. In this way, one or more stretches of the barrier can be brought into the inoperative condition, leaving the adjacent stretches of barrier in the normal operative condition.

REFERENCES:
patent: 3807699 (1974-04-01), France
patent: 4332503 (1982-06-01), Hurst, Jr.
patent: 4490068 (1984-12-01), Dickinson
patent: 4916859 (1990-04-01), Butler
patent: 4998843 (1991-03-01), Mothe
patent: 5009542 (1991-04-01), Hardin et al.
patent: 5181794 (1993-01-01), Wilson et al.
patent: 5263281 (1993-11-01), Osborn
patent: 5464177 (1995-11-01), Kramer et al.
patent: 5498100 (1996-03-01), Guernsey
patent: 5551796 (1996-09-01), Anderson et al.
patent: 34 20 503 (1984-12-01), None
patent: 2 750 148 (1997-12-01), None

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