| 主权项 |
1. An air return grille assembly for mounting over an open end of an air return duct, the air return grille assembly comprising:
(a) a grille comprising an outer perimeter, a front face, a rear face, a plurality of openings passing through the front and rear faces for airflow through said grille, and an unperforated periphery portion residing adjacent the outer perimeter of the grille and spanning around an opening-equipped area in which the plurality of openings are located; (b) a concealing arrangement joined to the grille and residing in a fixed, stationary position spaced apart from the rear face and fully spanning the opening-equipped area of the grille; (c) a plurality of bosses through which the concealing arrangement is supported on the grille, said plurality of bosses extending between the concealing arrangement and the unperforated periphery portion of the grille at spaced apart positions around an outer perimeter of the concealing arrangement; and (d) a frame comprising a plurality of frame walls projectinq from the rear face of the grille at the outer perimeter thereof, the frame walls reaching and extending past the concealing arrangement at positions spaced outwardly from the outer perimeter thereof, with distal ends of the frame walls residing in a common plane for abutment of said distal ends of said frame walls against a wall surface around the open end of the air return duct, said plurality of fame walls being perpendicular to said common plane; (e) open airflow spaces situated between the plurality of bosses around the outer perimeter of the concealing arrangement and arranged to enable airflow around said concealing arrangement and onward through the air return duct; wherein the concealing arrangement obstructs from view, through the plurality of openings, the air return duct when the air return grille is positioned over the open end of said duct, while the plurality of bosses are hidden behind the unperforated periphery portion of the grille. |
