Pipe coupling

Claim 1

A cylindrical pipe coupling including, an inner layer of rubber like material, a second layer of two sections of rubber like material reinforced with cord material, each section laid at an angle of about 65° with respect to the longitudinal axis of the coupling, one section having a left helix and the other a right helix, third and fourth layers of rubber like material positioned over the intersection of the two sections of said second layer, a fifth layer of two sections of rubber like material reinforced with cord material, each section laid at an angle of about 65° with respect to the longitudinal axis of the coupling, one section having a left helix and one a right helix, the helix of each section being opposite to the section of the second layer located under it, and a sixth layer of rubber like material located as an outer surface of said coupling, said coupling adapted to permit the insertion of a first pipe into one end thereof, said coupling further including a first annular insert located near the opposite end of the coupling, said first insert being comprised of a ridge shaped lip of rubber-like material affixed to or integral with the inner surface of said inner layer, said first insert defining an opening of a smaller diameter than said inner layer and being adapted to permit the insertion of a portion of a second pipe into said coupling, and a second annular insert located inwardly from said end of the coupling, said second insert comprising an inwardly protruding gasket shaped rubber like material affixed or integral with the inner surface of said inner layer, said second insert defining an angle of approximately 45° with said inner surface and defining an opening of a diameter less than the opening defined by said first insert, said first and said second inserts being adapted to permit the insertion of a portion of a second pipe into said coupling, thereby effectively sealing said first pipe with said second pipe.