Patent ID: 6192640
Filing Date: 2001-02-27
Classification: F24F

Abstract:
In combination:a double connector frame for use as a support member for mounting one large or two small return air grilles in a building structure;a building structure supporting the connector frame;a wall covering disposed over the building structure;the wall covering defining a ventilation opening;the connector frame including a substantially planar first surface and a second surface disposed opposite the first surface;the first surface abutting and being secured to the building structure;a pair of identical spaced-apart continuous rectangular projecting flanges extending from the second surface of the connector frame;the flanges being disposed in the ventilation opening of the wall covering;the frame defining a pair of openings, each of the flanges disposed about the perimeter of one of the openings;each of the flanges having a length dimension and a width dimension;the flanges being disposed in a side-by-side arrangement wherein the length dimensions are substantially parallel and the width dimensions are substantially parallel;each flange including a pair of intermediate members extending across the opening in the frame;a layer of porous filtering material covering each opening in the frame; andthe frame including a medial line of severance disposed equidistantly between the flanges thereby allowing division of the connector frame into a pair of identical smaller frames for mounting two small grilles singly.