Abstract: A pipe coupling for coupling adjacent ends of a pair of pipes includes a sleeve, a split-ring gland positioned around one of the ends of the sleeve, and at least one annular gasket positioned within the split-ring gland and configured to be compressed by the split-ring gland for sealing one pipe end to the sleeve. The split-ring gland includes two partially circular gland members with spaced ends defining a gap. The pipe coupling includes an armor positioned to span the gap between the spaced ends to provide a generally closed annular periphery about the gasket. The armor includes a corrugated portion having a plurality of corrugations engaging the split-ring gland and the gasket during compression of the gasket. The armor is cold formed to improve structural strength and durability.

Abstract: A preformed transition pipe coupling is disclosed for the joining together of a generally cylindrical plastic pipe end to a generally cylindrical metal pipe end. A middle ring is provided and a first end of a length of plastic pipe is inserted into and permanently joined to the first end of the middle ring at the factory. Preferably, the length of plastic pipe is joined by securing the plastic pipe to the middle ring by compressing the plastic pipe end between the middle ring and a compression member and securing it in place by utilizing metal teeth and grooves adjacent the inner periphery or outer periphery surface of the plastic pipe. The second end of a joined plastic length of pipe is heat fused to a plastic pipe in the field. A field installed mechanical coupling is attached to a second end of the middle ring to allow for field connection of the coupling to a metal pipe without welding.