Quick-releasable connectors for flexible plastic pipes

Abstract

A quick-releasable coupling device for a pipe in disclosed, said coupling device comprising a connector body having first, second, third and fourth concentric bores, a collar retained in said first bore having an inner surface inclined to the axis of said bores, a clamping member disposed about a pipe within the collar arranged for axial movement relative thereto, said clamping member comprising a plurality of flexible jaws and means cooperating with the inclined surface of the collar for moving the jaws inwardly to clamp the pipe within the connector upon relative movement between the collar and clamp member, means in the second bore for forming a seal between the outer surface of the pipe and the wall of the second bore, said pipe being disposed in the first, second and third bores, and means fixed to the collar for guiding the pipe into the coupling having an abutment member for the end of the clamping member; and including the improvement wherein a separate pusher element is provided at the end of the connector opposite said body and surrounding the pipe and arranged for longitudinal sliding movement and spaced from a clamping actuating member and having a locking member releasably holding the pusher in a position slightly spaced from the clamping actuating member, so that upon releasing or removing the locking member the pusher may be slid along the pipe into engagement with the clamping actuating member, thereby releasing the clamping member from the pipe and permitting ready withdrawal of the pipe from the connector.