Ventilating apparatus

Details Ventilating apparatus Ventilating apparatus

1991-01-30

1992-02-04

Joyce, Harold

98 218, B60H 306

Patent

active

050851322

ABSTRACT:
A ventilating apparatus includes a duct including an indoor air inlet port for taking in indoor air and an indoor air outlet port for discharging the indoor air to the outdoors, a one-way valve for opening the indoor air outlet port when discharging the indoor air to the outdoors, the one-way valve being disposed on the indoor air outlet port, and a filter for purifying contaminated outdoor air intruding from the outdoors by way of the indoor air outlet port. The indoor air can be discharged to the outdoors as smoothly as it is done with a conventional ventilating apparatus, and at the same time the contaminated outdoor air is filtered and thereafter introduced into a room as clean outdoor air. Hence, it is possible to prevent the inside of a room from being contaminated with contaminated outdoor air.

REFERENCES:
patent: 2271733 (1942-02-01), Clark
patent: 4022117 (1977-05-01), Mallian
patent: 4537115 (1985-08-01), Haesters
patent: 4741256 (1988-05-01), Huang
patent: 4963094 (1990-10-01), Meyer

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