Air diffuser

Claim 1

AN AIR DIFFUSER, COMPRISING A HOUSING HAVING A PAIR OF RELATIVELY LONG SIDE WALLS, A PAIR OF RELATIVELY SHORT END WALLS CONNECTING SAID SIDE WALLS AND A BOTTOM WALL, SAID BOTTOM WALL HAVING AN ELONGATED RECTANGULAR SLOT EXTENDING SUBSTANTIALLY FROM ONE END WALL TO THE OTHER END WALL AND FROM ONE OF SAID SIDE WALLS TOWARD THE OTHER OF SAID SIDE WALLS, THE PORTION OF SAID BOTTOM WALL BETWEEN THE OTHER OF SAID SIDE WALLS AND SAID SLOT FORMING AN ELONGATED AIR-DEFLECTING LIP, MEANS IN SAID HOUSING FOR ADMITTING CONDITIONED AIR UNDER PRESSURE INTO SAID HOUSING WHEREBY AIR WILL BE DISCHARGED FROM SAID HOUSING THROUGH SAID SLOT IN SAID BOTTOM WALL, AND MEANS SELECTIVELY TO ALTER THE PATTERN OF AIR DISCHARGED THROUGH SAID SLOT COMPRISING AN ELONGATED CYLINDRICAL DEFLECTOR ELEMENT HAVING A DIAMETER GREATER THAN THE WIDTH OF SAID LIP, A PAIR OF AXIALLY SPACED SUPPORT ELEMENTS INTERCONNECTING SAID SIDE WALLS AND EACH HAVING AN OPENING EXTENDING SUBSTANTIALLY FROM ONE SIDE WALL TO THE OTHER ADJACENT TO BUT ABOVE SAID BOTTOM WALL, SAID OPENINGS FREELY ACCOMMODATING SAID DEFLECTOR ELEMENT AND HAVING BOTTOM CONFIGURATIONS ARRANGED TO SUPPORT SAID DEFLECTOR ELEMENT SELECTIVELY IN FIRST AND SECOND POSITIONS THEREOF, SAID DEFLECTOR ELEMENT IN SAID FIRST POSITION THEREOF OVERLYING SAID SLOT AND BEING SUBSTANTIALLY IN CONTACT WITH SAID ONE SIDE WALL WHEREBY AIR PASSING THROUGH SAID HOUSING TOWARD SAID SLOT WILL BE DEFLECTED BY CONTACT WITH SAID DEFLECTOR ELEMENT ONTO SAID LIP AND WILL EXIT FROM SAID SLOT SUBSTANTIALLY IN A HORIZONTAL DIRECTION, SAID DEFLECTOR ELEMENT IN SAID SECOND POSITION THEREOF OVERLYING SAID LIP AND BEING SUBSTANTIALLY IN CONTACT WITH SAID OTHER SIDE WALL WHEREBY AIR PASSING THROUGH SAID HOUSING TOWARD SAID SLOT WILL NOT COME INTO SUBSTANTIAL CONTACT WITH SAID LIP AND WILL EXIT FROM SAID SLOT SUBSTANTIALLY IN A VERTICAL DIRECTION, AND RESILIENT MEANS RELEASABLY TO RETAIN SAID DEFLECTOR ELEMENT IN SAID RESPECTIVE POSITIONS THEREOF.