Corrugated plastic pipe connector

Claim 1

A reusable one-piece liquid-tight plastic connector for affixing in a liquid-tight manner to a conduit having a ridge adjacent a conduit end portion, the connector comprising: a body including a body wall and a bore, open at a first end communicating with said bore for receiving therein the conduit end portion; sealing means, disposed in said bore remote from said first end, for sealing in a liquid-tight manner against the conduit end, the conduit end portion having pushed through said first end into said bore; and an axially extending resilient locking finger having a base attached to the body wall intermediate said first end and said sealing means, and having a free end with an end projection disposed within said body, said end projection extending into said bore; a body wall region whereat said base of said finger is attached being thinner in cross-section than other portions of said body, said thinning contributing to the resiliency of said finger, wherein the body wall region of thinner cross-section extends from the base of said finger to said first end; the end projection of said finger resiliently engaging the ridge on the conduit end portion so as to retain the conduit end against said sealing means to form a liquid-tight seal, locking the conduit end portion within the connector; and a force attempting to withdraw the conduit from the connector causing the end projection of said finger to more firmly and deeply resiliently engage and retain said ridge such that a greater withdrawal force results in a firmer and deeper engagement with said ridge such that the conduit end portion is locked within the connector.