Fences – Highway guard
Reexamination Certificate
1999-05-21
2001-05-29
Browne, Lynne H. (Department: 3629)
Fences
Highway guard
C256S001000, C256S059000, C040S612000, C116S06300T, C404S006000, C404S009000
Reexamination Certificate
active
06237895
ABSTRACT:
FIELD OF INVENTION
The present invention is directed to a crowd control rail assembly and more specifically to an assembly using a pair of unfolded barricades in combination with a plastic rail.
BACKGROUND OF THE INVENTION
For crowd control, it is known to link together simple spaced so-called A-frames with horizontal rails; the frames, of course, are not free-standing and they are easily jarred loose. Thus, especially for police use, free-standing metal-type grids which interlock are commonly used. These are, of course, relatively cumbersome and expensive. In the highway field as illustrated by U.S. Pat. No. 5,003,912, barricades of molded plastic have been known for some time. They typically includes two frame or panel units hinged together so they can be spread apart for use. The individual panel units are one-piece, integral, hollow plastic panels formed by rotational or blow molding. For increased stability, the hollow plastic panels may be filled with sand as a ballast. To provide for crowd control, it would be desirable to link these barricades together in a manner in which an interlinking rail is not easily jarred loose.
OBJECT AND SUMMARY OF INVENTION
Thus, it is a general object of the present invention to provide an improved crowd control rail assembly.
In accordance with the above object, there is provided a crowd control rail assembly comprising at least two plastic barricades each constructed from two substantially similar planar frame units which are integrally molded, each unit having a pair of legs with bases at one end and hinged together at the other end and having a upper planar face substantially extending between the two legs to form a one-piece unit, each barricade being free-standing on its bases when the frame units are open. Each planar face includes a vertically elongated pass through slot. An elongated rail, having two ends, of rectangular cross-section is adapted for insertion of its two ends into the slots of the spaced barricades, the rail having bottom notches close to each end mating with the bottom of said slots.
In addition, a method of forming a rail assembly is provided.
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Browne Lynne H.
Flehr Hohbach Test Albritton & Herbert LLP
Malcolm Tomlyne A
Wright Jerry G.
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