Patent ID: 6450549
Filing Date: 2002-09-17
Classification: F16L

Abstract:
A press-fitting connector for plastic composite pipes, the plastic composite pipes comprised of an inner plastic layer and an outer plastic layer and a middle layer comprised of metal and arranged between the inner and outer layers, the press-fitting connector comprising:a support member configured to receive an end of a plastic composite pipe by slipping the end of the plastic composite pipe onto the support member; the support member having an outer collar having a first end face facing the plastic composite pipe and a second end face facing away from the plastic composite pipe; an insulating plastic ring positioned at the first end face of the outer collar; a press-fit sleeve configured to secure the end of the plastic composite pipe on the support member; wherein the outer collar is a circumferential rib and has two diametrically opposed arranged cutouts; wherein the insulating plastic ring is a curved spring washer which has two convexly curved portions and two concavely curved portions, facing the plastic composite pipe, respectively, wherein at a center of each one of the convexly curved portions a tongue is formed as a monolithic part of the spring washer, wherein the tongue extends in an axis-parallel direction relative to an axis of the spring washer, respectively, wherein the tongue is configured to engage one of the cutouts of the circumferential rib, respectively; wherein the axis-parallel tongues in an end position of the plastic composite pipe, when completely inserted between the support member and the press-fit sleeve and stopped by the insulating plastic ring and the circumferential rib, project partially from the cutouts in the circumferential rib past the second end face of the outer collar in the axis-parallel direction.