Releasable coupling for air carrying tubes

A releasable coupling for a tube comprised of an interior wall, wherein said coupling comprises:

• (a) a body comprising a cavity;
• (b) mounting means disposed first, second, third, and fourth concentric, stepped bores, wherein:
• 1. the diameter of said first bore is larger than the diameter of said second bore, the diameter of said second bore is larger than the diameter of third bore, and the diameter of said third bore is larger than the diameter of said fourth bore;
• 2. each of said first, second, third, and fourth stepped bores is comprised of a step defined by the intersection of two intersecting surfaces;
• (b) compression means for compressing said tube, wherein:
• 1. said compression means is disposed within said first bore,
• 2. said compression means has an inner surface inclined to the axis of said first bore;
• (c) a clamping member mounted within said compression means for axial movement relative to said compression means and having a bore slightly larger than the diameter of said tube, wherein said clamping member comprises at least six flexible jaws and means on said jaws cooperating with said inner inclined surface to drive said jaws inwardly upon relative axial movement between said compression means and said jaws;
• (d) tube support means for supporting at least a portion of said interior wall of said tube, wherein said tube support means is substantially cylindrical and is comprised of a flanged head and a bore;
• (e) at least a first annular, concentric, elastomeric resilient sealing means, a second annular, concentric elastomeric resilient sealing means, a first, annular concentric washer, and a second, annular, concentric washer, wherein:
• 1. each of said first sealing means, said first concentric washer, and said second sealing means is disposed within said second bore and is free to move axially within said second bore,
• 2. said second concentric washer is disposed within said first bore and is retained by means disposed within said first bore, and
• 3. said second concentric washer has an outer diameter which is larger than the outer diameter of said first concentric washer.