Hot air diffuser

Claim 1

AN AIR DIFFUSER INCLUDING A REAR WALL HAVING AN INTURNED LOWER PORTION TERMINATING IN A FORWARDLY AND UPWARDLY PROJECTING FLANGE-LIKE DEFLECTOR OF SUBSTANTIAL WIDTH SPACED VERTICALLY FROM THE LOWER EDGE OF THE REAR WALL, END WALLS CONNECTED TO SAID REAR WALL TO PROJECT FORWARDLY THEREFROM, SAID END WALLS HAVING INWARDLY PROJECTING BASE PORTIONS PROVIDED WITH UPTURNED FLANGE-LIKE PINTLE MEMBERS ON THEIR FRONT EDGES, A FRONT WALL AND DAMPER MEMBER HAVING INTURNED FLANGES OF DOWNWARDLY FACING CHANNEL SECTION SUPPORTEDLY ENGAGED WITH SAID PINTLE MEMBERS ON SAID END MEMBERS, SAID FRONT MEMBER HAVING AN INWARDLY AND DOWNWARDLY PROJECTING FLANGE-LIKE DEFLECTOR ON ITS UPPER EDGE, KEEPER MEMBERS PROVIDED WITH A PLURALITY OF KEEPERS DISPOSED ON THE INNER SIDES OF SAID END WALLS, AND DETENTS FIXEDLY MOUNTED ON THE INWARDLY PROJECTING PORTIONS OF SAID FRONT WALL AND DAMPER MEMBER IN COACTING RELATION WITH THE SAID KEEPER MEMBERS, SAID KEEPER MEMBERS ACTING TO ADJUSTABLY SUPPORT SAID FRONT MEMBER, SAID DETENTS BEING OF NONMETALLIC MATERIAL AND HAVING THRUST SLIDING ENGAGEMENT WITH THE INNER SIDES OF THE END WALLS AND ACTING TO HOLD THE ENDS OF THE FRONT WALL DAMPER MEMBER IN SPACED RELATION TO THE END WALLS AND COACTING WITH SAID KEEPER MEMBERS TO PREVENT VIBRATION OF SAID FRONT WALL DAMPER MEMBER.