Patent ID: 9297486
Filing Date: 2016-03-29
CPC Classification: F16L,Y10T

Claim Text:
1. A fitting connectable to an end portion of a pipe, the fitting comprising: an insert member having a generally cylindrical wall structure formed of a relatively flexible, resilient plastic material, the insert member being configured to be received at least partly within the end portion of the pipe; an annular channel formed in an exterior surface of the wall structure of the insert member, a thickness of the wall structure within the annular channel being thinner than a thickness of the wall structure adjacent thereto; a retention member seated within the annular channel of the insert member and configured to be received at least partly within the end portion of the pipe, the retention member engaging an inner surface of the end portion of the pipe to help frictionally secure the end portion of the pipe on the insert member when the insert member is received at least partly within the end portion of the pipe; the retention member being comprised of a flexible sealing member which imparts an increased force against the inner surface of the end portion of the pipe in response to an increase of internal fluid pipe pressure which outwardly flexes the thinner wall structure within the annular channel relative to the wall structure adjacent thereto; a plurality of reinforcement ribs formed on an inner surface of the cylindrical wall structure of the insert member; and an additional retention member in the form of a slidably moveable sleeve carried by the insert member and configured to be received at least partly within the end portion of the pipe, the moveable sleeve engaging the inner surface of the end portion of the pipe to help frictionally secure the end portion of the pipe on the insert member when the insert member is received at least partly within the end portion of the pipe.