Patent ID: 8002013

Claim:
A device for altering the airflow pattern from a ceiling vent diffuser having an interior surface and an exterior surface and where the airflow through the diffuser is from the interior surface and toward the exterior surface thereof, said device comprising: a flexible member; having an inner surface and an outer surface; a locking mechanism extending from the inner surface and being adapted to detachably engage at least one vane on the exterior surface of the vent diffuser and to thereby be retained thereon; said flexible member obscuring a region of openings in the vent diffuser and thereby substantially preventing air from flowing out of that region of the vent diffuser; and wherein the locking mechanism comprises: at least one tab fixedly secured to the inner surface of the flexible member and extending outwardly therefrom, said at least one tab in cooperation with the inner surface of the flexible member being adapted to engage a first edge of one of the vanes; and a hook member pivotably secured to the inner surface of the flexible member and extending outwardly therefrom, said hook member being resiliently biased to engage a second edge of one of the vanes.