Abstract: An apparatus (10) for connecting and sealing duct sections is adapted for connecting and sealing round ducts (100), round oval ducts (200), and other commonly used ducts. The apparatus includes first and second connectors. Each connector includes a tubular member (20) having an outside diameter that is incrementally smaller than the inside diameter of the duct to which it is attached. An O-ring (40) carried in an O-ring channel defined in the tubular member makes an air-tight seal with the duct. A radially directed annular flange (50) extends outwardly from an outer end of the tubular member. An outer perimeter of the flange forms a rolled edge (60). A gasket (70) may be carried between the outer surfaces of adjacent flanges of first and second connectors associated with first and second ducts to be joined. Duct sealer (80) may also be carried between the outer surfaces, with or without a gasket. A plurality of fasteners (90) may be used to fasten the flanges together.

Abstract: A gasket or sealing ring designed to fit over an unrolled or unfolded edge of an inner (male) duct section or connector to be joined, for sealing various types of connections between duct sections and/or connectors, includes a sealing ring having a base portion for receiving an end of an inner (male) duct section or connector to be joined and a substantially J-shaped cross-section, and a flexible hollow sealing portion of substantially circular cross-sectional shape affixed to the base portion and protruding in a radially outward direction, for engagement with an outer (female) duct section or connector to be joined. In one embodiment, the base portion also includes a lip protruding in a radially inward direction for engagement with a complimentary groove or depression on the inner (male) duct section to be joined.

Abstract: A gasket or sealing ring designed to fit over an unrolled or unfolded edge of an inner (male) duct section or connector to be joined, for sealing various types of connections between duct sections and/or connectors, includes a sealing ring having a base portion for receiving an end of an inner (male) duct section or connector to be joined and a substantially J-shaped cross-section, and a flexible hollow sealing portion of substantially circular cross-sectional shape affixed to the base portion and protruding in a radially outward direction, for engagement with an outer (female) duct section or connector to be joined. In one embodiment, the base portion also includes a lip protruding in a radially inward direction for engagement with a complimentary groove or depression on the inner (male) duct section to be joined.