Pneumatic door-operating arrangement

Details Pneumatic door-operating arrangement Pneumatic door-operating arrangement

1983-06-27

1985-06-18

Cohen, Irwin C.

Motors: expansible chamber type

With motive fluid valve

Plural manual control stations

91433, 91446, 91448, 91453, 91459, 91464, 91465, 13759615, 13759616, 49 28, F15B 1110, F15B 13043, E05F 1502

Patent

active

045235139

ABSTRACT:
A pneumatic door control equipped with a door control valve for operating a door drive to an open or a closed position. The door control valve has an opening and a closing solenoid-operated pilot valve and an opening and closing spool valve, each operable to a passage or a vent position. A shuttle valve is part of the control valve and works in conjunction with an operator-controlled emergency valve to vent both spool valves simultaneously. A differential pressure switch is connected to the door drive to sense abnormal pressure expended in a door-opening or closing movement. Such an occurrence will output a signal to an electronic switching device which also monitors, via limit switches, whether a door is fully opened or fully closed. If excess pressure occurs during a door-closing movement, the switching device will trigger the control valve to reverse to the opening position. If excess pressure occurs during an opening movement, the switching device triggers both solenoid-operated pilot valves simultaneously. The control valve has a non-return valve which recognizes the dual triggering condition and outputs to the shuttle valve so that the two spool valves can be vented simultaneously. A throttle valve is disposed between the emergency valve and control valve for restricting the flow of pressurized air following an emergency condition.

REFERENCES:
patent: 2485252 (1949-10-01), Almond
patent: 2630828 (1953-03-01), Bent
patent: 3316930 (1967-05-01), Gardner
patent: 3908515 (1975-09-01), Johnson
patent: 4257455 (1981-03-01), Cameron
patent: 4369696 (1983-01-01), Klatt et al.

Affiliated with

Also associated with

Rating

Pneumatic door-operating arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pneumatic door-operating arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pneumatic door-operating arrangement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-975594