Patent ID: 9604404
Date: 2017-03-28
CPC Classifications: B29C,F16L,H02G

Claim:
1. A coupling for attachment to a conduit having an insertion end, an outer surface of the insertion end of the conduit being smooth and free of grooves, flanges and beads, said coupling comprising: a first member having an exterior surface and an interior surface, the interior surface of the first member defining a first passageway through the first member, the first passageway extending from an entry end to a proximal end of the first member; a second member in spin weld engagement with the first member, the second member having an exterior surface and an interior surface, the interior surface of the second member defining a second passageway through the second member, the second passageway extending from an attachment end to an opposite end of the second member, wherein the interior surface of the second member defines a recessed region having a first width, and another recessed region having a second width, the first width being greater than the second width, the interior surface of the second member defining the another recessed region comprising a ledge, the ledge comprising a raised inner lip and a recessed outer portion, the raised inner lip being closer to the attachment end of the second member than the recessed outer portion, the recessed outer portion comprising an arcuate surface having an arcuate, side cross- sectional shape; a gripping ring having an inner edge defining a series of teeth, the gripping ring being disposed within the recessed region; a support ring being rotatably disposed within the recessed region and the another recessed region, the support ring having a proximal face that abuts the gripping ring, the support ring further comprising an angled face longitudinally adjacent to the proximal face, the angled face disposed at an obtuse angle with respect to the proximal face, the support ring further comprising a distal face opposite the proximal face, the distal face comprising an O-ring recess having an arcuate shape, the support ring comprising an exterior surface, the proximal face extending to and being disposed at an acute angle with respect to the exterior surface of the support ring; and an O-ring disposed within the another recessed region, the recessed outer portion being sized to receive the O-ring, wherein the O-ring abuts the arcuate surface of the recessed outer portion at least at one point in time during insertion of the conduit into the coupling.