Patent ID: 8117794
Filing Date: 2012-02-21
Classification: E04C,E06B

Abstract:
1. A two part grille molded from opaque plastic and adapted to be fitted into an opening in a wall or a door comprising: two frames, each frame being identical to the other and having lateral uprights, one frame defining a perimeter of one part of the grille and said other frame defining the other part of said grille; a series of parallel horizontal vanes evenly spaced along the lateral uprights of each frame to form a grating; a plurality of tenon elements and mortise elements fixed to a backside of each frame and arranged such that said tenon elements on one frame capably register with said mortise elements on the other frame when said two frames are in registration and said elements are operable to lock the two frames together when said tenon elements engage with said mortise elements mutually; a plurality of protruding poles fixed to the backside of each frame; and one or more screens or air filters supported by these protruding poles placed within a mesh of the screen(s) or air filter(s) between the two parts of the grille structure.