Air diffuser

Claim 1

IN A ROOM AIR DIFFUSER FOR PLACEMENT IN A CEILING ADJACENT A VERTICAL PARTITION AND ADAPTED TO DIRECT AIR FROM AN AIR DUCT INWARDLY TOWARDS THE CENTER OF A ROOM AND ALSO DOWNWARDLY ALONG THE FACE OF A PARTITION, A TAKE-OFF PIPE FOR ATTACHMENT TO AN AIR DUCT, SAID PIPE INCLUDING A FIRST WALL EXTENDING OUTWARDLY AND DOWNWARDLY AND ADAPTED TO EXTEND AT A RELATIVELY SHARP ANGLE TO SAID CEILING, A SECOND WALL OPPOSITE SAID FIRST WALL AND ADAPTED TO BE LOCATED IN A CEILING AND ADJACENT A PARTITION, SAID SECOND WALL EXTENDING DOWNWARDLY FROM A DUCT AND AT A RELATIVELY ABRUPT ANGLE TO A CEILING, A PAIR OF OPPOSED SUBSTANTIALLY VERTICAL WALLS CONNECTING THE RESPECTIVE ENDS OF SAID FIRST AND SECOND WALLS TO FORM A RECTANGULAR OUTLET FOR SAID TAKE-OFF PIPE AND A SERIES OF ADJUSTABLE VANES EXTENDING BETWEEN SAID OPPOSED SUBSTANTIALLY VERTICAL WALLS, SAID VANES BEING GENERALLY VSHAPED IN CROSS-SECTION AND BEING INDIVIDUALLY ADJUSTABLE ABOUT AXES EXTENDING BETWEEN SAID PAIR OF OPPOSED WALLS AND PARALLEL TO THE RIDGE LINES OF SAID VANES, RESPECTIVELY, AND SAID VANES EACH HAVING A PROTRUSION EXTENDING LONGITUDINALLY SUBSTANTIALLY THE FULL LENGTH THEREOF WITHIN THE ANGLE THEREOF ADJACENT AND PARALLEL TO THE RESPECTIVE AXIS THEREOF TO CAUSE MIXING OF AIR PASSING THROUGH SAID DIFFUSER WITH AIR IN THE ROOM, SAID PROTRUSIONS BEING FORMED OF AN EXTENSION OF ONE LEG OF EACH VANE FOLDED BACK UPON ITSELF AND THEN ABOUT ITS RESPECTIVE PIVOT ROD.