Light restricting housing for a ventilation system

Details Light restricting housing for a ventilation system Light restricting housing for a ventilation system

1991-03-14

1992-07-28

Joyce, Harold

Ventilation

Having inlet airway

Including specific cover or shield for exterior vent opening

454905, F24F 1318

Patent

active

051336928

ABSTRACT:
A light restricting housing for a ventilating system including a flow-through frame member having a plurality of spaced parallel blade members disposed there, the blade members being contoured to obscure direct passage of light therethrough and including displacement means on the planar surfaces thereof to hold the blade members in spaced relation to each other.

REFERENCES:
patent: 3285156 (1966-11-01), Bohanon
patent: 3628442 (1971-12-01), Hijhuis
patent: 3771430 (1973-11-01), Lane
patent: 3968738 (1976-07-01), Matzke

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