US Patent 8628122 Pipe compression joint

A pipe compression joint assembly (10) comprises a male pipe end (20) having an outwardly-extending annular rib (34), a female pipe end (40) adapted for slidable insertion of the male pipe end (20) therein, a first clamp ring (54) adapted for slidable coupling with the male pipe end (20) and bearing against the annular rib (34), and a second clamp ring (52) fixedly attached to the female pipe end (40). The first clamp ring (54) can be controllably urged toward the second clamp ring (52) after the male pipe end (20) has been inserted into the female pipe end (40) so that the female pipe end (40) deformably engages the annular rib (34) to effect a sealed joint without the use of a gasket.