Electro-pneumatic control valve for pneumatic door actuator

Details Electro-pneumatic control valve for pneumatic door actuator Electro-pneumatic control valve for pneumatic door actuator

1981-01-14

1983-01-25

Schwadron, Martin P.

Motors: expansible chamber type

With motive fluid valve

For double-acting motor

13759617, 13762565, F15B 1304, F15B 1108

Patent

active

043696961

ABSTRACT:
A vehicle door control valve device having a pair of two-way, electro-magnetically operated, pneumatic valve members arranged so that one valve member is operated to a first position, in which compressed air is supplied to one side of a pneumatic actuator that operates the door, while concurrently, a second identical valve member is operated to an opposite position, in which compressed air is exhausted from the other side of the pneumatic door actuator. The relative positions of the respective valve members may be alternately switched to effect door opening and closing. Operation of the valve members is electro-magnetically controlled by primary and secondary coils arranged to cooperate with a permanent magnet, so that only momentary energization of the coils is necessary to effect switching of the valve members. The arrangement is such that in the case of an emergency, opposite sides of the pneumatic door actuator are both de-pressurized to permit manual door operation.

REFERENCES:
patent: 2409517 (1946-10-01), Schmit
patent: 2476519 (1949-07-01), Van Der Werff
patent: 2633871 (1953-04-01), Parsons
patent: 2799293 (1957-07-01), Clay
patent: 3212751 (1965-10-01), Hassa

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