Swivel joint

Claim 1

A swivel plumbing joint comprising a first fitting having a receptacle end; a second fitting having a plug end positionable in said receptable end to be rotatably mounted therein, said receptacle end having an internal mating surface and said plug end having an external mating surface; one of said mating surfaces having a circumferential locking groove including first and second portions, said first portion having a semicircular inner section and being deeper and further from the distal end of said surface than said second portion, the other of said mating surfaces having a circumferential receiving groove adjacent said locking groove with said plug end mounted in said receptacle end; a locking ring circular in cross-section positioned in said locking groove and engageable with said circumferential receiving groove with said plug end mounted in said receptacle end, said receiving groove having a width approximately equal to the width of said locking ring. a shoulder surface on said plug end disposed between said circumferential locking groove and the distal end of said second fitting; a reduced diameter barrel on said plug end extending from said shoulder thereby forming a seal recess therebetween, said receptacle having a terminal shoulder extending inwardly at the internal end of said internal mating surface to bound said seal recess; and an O-ring seal member in said seal recess and in the assembled position being spaced from said terminal shoulder and in engagement with said shoulder surface.