Patent ID: 6561895
Filing Date: 2003-05-13
Classification: F24F

Abstract:
A damper for an air flow system, characterized in that:the damper includes a plurality of separate control plates supported from a supporting surface having an airflow opening therein; each of the plurality of separate control plates include a plurality of offset apertures formed therein; a first sealing means between one of the plurality of control plates and the supporting surface around a perimeter of the airflow opening; a second sealing means between the plurality of control plates around outside perimeters of the plurality of offset apertures; a plurality of spaced supporting elements secured to the supporting surface having the airflow opening therein; the plurality of spaced supporting elements passing through one of the plurality of control plates; and a drive means for axially moving the plurality of control plates toward and away from each other and the supporting surface, to regulate and diffuse the flow of air through the airflow opening.