Ventilation grill

Details Ventilation grill Ventilation grill

1990-03-07

1991-08-27

Joyce, Harold

98101, F24F 1314

Patent

active

050423681

ABSTRACT:
A ventilation grill comprising a housing having a rear wall provided with apertures and side walls projecting from the rear wall defining a compartment having an opening wherein fins are pivotably mounted on the side walls for controlling the flow of air through the opening. A damper is located in the compartment defined by the side walls and rear walls between the fins and the rear wall for controlling the passage of air therebetween.

REFERENCES:
patent: 205786 (1878-07-01), Collins
patent: 766957 (1904-08-01), Lloyd
patent: 1559376 (1925-10-01), Riker
patent: 3500739 (1970-03-01), Dry
patent: 4426918 (1984-01-01), Lambert

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