Patent ID: 7404838

Claim:
A support for an air filter, the air filter having an outside surface and an opposite inside surface, said support comprising: a helical member which is shaped and dimensioned to fit against the inside surface of the air filter to prevent the air filter from inwardly collapsing; said helical member fixedly attached to the inside surface of the air filter; a bonding agent fixedly attaching said helical member to the inside surface of the air filter; said helical member having a length; said bonding agent placed at periodic intervals along said length of said helical member; said helical member fabricated from spring steel; when the air filter is viewed from the top, said periodic intervals being about every 360°; when the air filter is viewed from the side, said bonding agent placements being collinear; said bonding agent being epoxy; and, said helical member having one of (1) a tapered shape, and (2) a cylindrical shape.