Movable or removable closures – With traffic director or controller; e.g. – one-way
Patent
1985-07-29
1986-12-23
Downey, Kenneth
Movable or removable closures
With traffic director or controller; e.g., one-way
49131, 49 13, 49 25, 49 35, E01F 1300
Patent
active
046303952
ABSTRACT:
A portable vehicle barrier for positioning in a roadway or the like has a base plate carrying first and second spaced stanchions forming a checkpoint therebetween. A shaft is pivotally secured to the base plate and extends transversely between the stanchions. A gate or barrier plate is pivotal with the shaft between a first horizontal position and a second angularly disposed position adapted for preventing vehicle passage through the checkpoint by engagement of the barrier plate with the vehicle. An anti-tampering means associated with said stanchions and said gate is provided for preventing unauthorized interference with the raising and lowering of the gate.
REFERENCES:
patent: 3626637 (1971-12-01), Rudicel
patent: 3775912 (1973-12-01), Walls
patent: 4152871 (1979-05-01), Kardash, Jr.
patent: 4490068 (1984-12-01), Dickinson
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