Patent ID: 8216034

Claim:
An air vent cover system for mounting within a duct, the duct having a pair of side walls, a top wall substantially perpendicular to the side walls, and a bottom wall substantially perpendicular to the side walls, the air vent cover system comprising: a housing; an opening formed in the housing; tensioning means for releasably maintaining at least a portion of the housing within the duct, the tensioning means applying an outward force on the two side walls of the duct causing the top wall and the bottom wall to move in a general direction inward against the housing; a non-pivoting, stationary grate secured to the housing, the stationary grate having a plurality of horizontal and vertical bars, the bars spaced from each other a sufficient distance to maintain a child-sized hand from going between the bars; a cover grate pivotally mounted to the housing, the cover grate having a plurality of semi-circular slits for allowing maximum amount of air to pass therethrough; magnetic latching means secured to the housing and cooperating with a magnet striker plate on the cover grate for releasably maintaining the cover grate against the housing; and a plurality of tracks attached to the cover grate, an air filter receivable within the tracks and positioned against the slits; wherein the plurality of tracks include a pair of parallel side tracks and a bottom track substantially perpendicular to the side tracks; and wherein the air filter has a lower side edge and an upper side edge, the air filter also having a left end and a right end, the upper side edge of the air filter having a small semi-circular cutout, thereby allowing the air filter to bypass the magnet striker plate.