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 been pushed through said first end into said bore; 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, said base being located between said free end and said first end of 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 the 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.