Patent ID: 7393272

Claim:
An air filtering assembly including: a box fan assembly, said box fan assembly including: a parallelepiped housing with square open sides, an electric motor having a fixed portion mounted on and within the housing and a rotor assembly, a fan blade also within the housing and mounted on said rotor assembly means for connecting the motor to a source of electric power so that the rotor assembly and fan rotate about an axis normal to and generally centered on said open side surfaces of the housing to move air through the open sides, said housing including a peripheral wall between the peripheries of the open sides including opposite side portions having outer surfaces; a filter assembly, said filter assembly including a parallelepiped frame having opposite sides, said sides having through openings and generally rectangular peripheries, and having a peripheral wall between the peripheries of said sides, and a sheet of filter material within said filter assembly frame between said sides, one of said sides of said filter assembly corresponding in shape to and being along one of the sides of said housing of said box fan assembly; a plurality of attachment members, each of said attachment members having a rear portion having a rear surface, a front surface opposite said rear surface, and first and second spaced ends; a front portion extending along the front surface of said rear portion and having first and second spaced ends, and an end portion joining the first ends of said rear and front portions and defining a passageway transverse of said front, rear, and end portions; a plurality of lengths of adhesive adhering the rear surfaces of said attachment members to the outer surfaces of the side portions of said peripheral wall; and at least one resiliently elastic cord extending through the passageways in the attachment members and between the attachment members around the side of the filter assembly opposite said box fan assembly to retain said filter assembly along one of the sides of said housing of said box fan assembly.