Air vent closure system

Details Air vent closure system Air vent closure system

1990-05-18

1992-01-21

Makay, Albert J.

Ventilation

Having outlet airway

With air pump

137486, 454340, 454359, F04D 2514, F16K 3112

Patent

active

050819135

ABSTRACT:
An automatic ventilator closure is described which operates on the basis of an over-pressure within the conduit leading up to the ventilator outlet. Electrical interlocks control a motor to place the closure in an open or closed condition.

REFERENCES:
patent: 2383003 (1945-08-01), Mader
patent: 2750868 (1956-06-01), Mieczkowski et al.
patent: 2938536 (1960-05-01), Ehrenberg
patent: 4334648 (1982-06-01), Buth et al.
patent: 4375224 (1983-03-01), Noll
patent: 4624280 (1986-11-01), De Pirro
patent: 4665932 (1987-05-01), Quenin
patent: 4671318 (1987-06-01), Benson
patent: 4796651 (1989-01-01), Ginn et al.

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