Patent ID: 8628117

Claim:
A flexible push-fit ring-seal joint structure, on an outlet of a plastic pipe, the flexible push-fit ring-seal joint structure comprising: a lip portion defined at the outlet, wherein an inner surface of the lip portion tapers inward away from the outlet, a throat portion adjacent to the lip portion, wherein the throat portion comprises a V-shaped outer ridge and a V-shaped inner ridge, the V-shaped inner ridge is adjacent to the V-shaped outer ridge, wherein the V-shaped outer ridge defines an O-ring receiving region and the V-shaped inner ridge defines a deflection tolerating zone, wherein the inner surfaces of the V-shaped inner ridge and the V-shaped outer ridge taper outward toward the outlet, a dual lips rubber seal disposed into the V-shaped outer ridge, wherein the dual lips rubber seal is divided into a rounded first lip portion and a rounded second lip portion with a groove formed therebetween wherein the dual lips rubber seal has a sloped surface, wherein the first lip portion merges with one end of the sloped surface and the second lip portion forms a right-angled portion with opposite end of the sloped surfaced, wherein a first gap is formed between the right-angled portion and the inner surface of the joint structure.