Patent ID: 6315657
Filing Date: 2001-11-13
Classification: F24F

Abstract:
An air outlet grille for controlling the direction of air flow therethrough, comprising:a housing of rectangularly disposed frame members;a series of parallel louver blades, each pivotably connected to opposed inward faces of frame members at opposite ends of the blade by first attachment means for rotation of the blades about parallel axis of rotation;resilient indexing means connected to said housing by second attachment means for releasable retention of said louvers at selected rotational displacement, comprising at least one spring means having an arcuately disposed plurality of inwardly directed convex projections, at least one of said louver blades including on the rear edge thereof an outwardly projection configured to bear against successive means whereby said outwardly convex projections of the spring of said at least one louver blade is rotatably adjusted.