Instant defense barrier

Details Instant defense barrier Instant defense barrier

1985-08-19

1987-05-19

Kundrat, Andrew V.

Road structure, process, or apparatus

Traffic steering device or barrier

49 49, 256 1, E01F 1300

Patent

active

046663312

ABSTRACT:
An instant defense barrier for providing unobtrusive protection for a building or other site. A plurality of barrier post assemblies are anchored in the earth. Each assembly includes a barrel and a post slidably fitted in the barrel. The head end of the post portion is essentially flush with the level of the roadbed when the post is in the normal, non-extended position. When activated by closing a switch, the post is propelled from the confined position in the barrel by an explosive charge, a compression spring or other propulsive forces to a locked extended position to provide a barrier against unauthorized passage by a motor vehicle. A plurality of auxiliary cables are optionally connected between adjacent posts to provide further obstruction to the progress of small vehicles, such as motorcycles or bicycles.

REFERENCES:
patent: 364175 (1887-05-01), Hurd
patent: 1884447 (1932-10-01), White
patent: 2315516 (1943-04-01), Gray
patent: 3451164 (1969-06-01), Kappelman

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