Patent ID: 6800024
Filing Date: 2004-10-05
Classification: F24F

Abstract:
A termination receptacle for an air supply duct comprising:a housing having a wall surrounding an axis of the housing; an inlet pipe arranged for connection to the air supply duct for receiving air therefrom; the inlet pipe being connected to the wall of the housing generally at right angles to the axis so as to communicate the air from the duct through an opening in the wall into the housing; the housing having one end closed and an opposed open end such that the air supplied into the housing passes from the housing through the open end; the housing having a mounting flange member at the open end for attachment of the housing to a mounting surface such that the axis is generally at right angles to the mounting surface; a damper sleeve member having an open discharge end and an insertion portion extending from the discharge end and arranged for insertion into the open end of the housing for receiving the air therefrom a vent plate member; the vent plate member having a plate portion with a central perforated discharge area which is perforated for the passage of air therethrough and a peripheral surrounding flange; the vent plate member having a projecting connecting portion extending from the plate portion generally at right angles to the plate portion for connecting the vent plate member to the damper sleeve member at the open end thereof for communication of the air from the housing through the damper sleeve member and through the central perforated discharge area; the connecting portion and the damper sleeve member being arranged such that the vent plate member is maintained attached thereto with the plate portion generally at right angles to the axis so as to lie parallel to the mounting surface on a side thereof opposite to the mounting flange member; the connecting portion and the damper sleeve member being arranged such that rotation of the vent plate member about the axis causes common rotation of the damper sleeve member about the axis therewith; the wall of the housing defining at least a portion thereof at the opening which is circular cylindrical at least partly surrounding the axis; the insertion portion of the damper sleeve member being arranged to rotate around the axis with rotation of the damper sleeve member and being shaped to cooperate with the circular cylindrical portion of the housing to move gradually between a first position in which the opening is fully exposed by the insertion portion allowing passage of air from the inlet through the full area of the opening into the housing and a second position in which the insertion portion fully covers the opening thus closing off flow of air through the opening into the housing such that the insertion portion acts as a damper.