Communications: electrical – Traffic control indicator – Combined
Patent
1987-09-08
1990-01-09
Orsino, Joseph A.
Communications: electrical
Traffic control indicator
Combined
404 6, 49 49, E01F 1300
Patent
active
048931195
ABSTRACT:
A method of operating a vehicle barricade comprising the steps of providing an hydraulic system comprising an electrically operated motor and a passive accumulator, the hydraulic system is operably connected to a barrier for causing the barrier to be displaced between a first lowered position and a second raised position. The presence of obstructions disposed below the barrier is monitored and the barrier is prevented from being displaced to the first position upon the detection of an obstruction. An electromechanical valve is electrically operated for causing the motor to displace the barrier between the positions. The valve is electrically operated causing the accumulator to displace the barrier between the positions when the motor is not operating. The barrier is displaced to the second position upon the occurrence of a defined emergency condition.
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Nasatka Barrier, Inc.
Orsino Joseph A.
Tumm Brian R.
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