| 摘要 |
A coupling assembly that includes: a) a female coupling member including a cavity opening onto its receiving end, where the cavity has an annular groove; b) a male coupling member including annular rib, the rib having a tapered leading edge, a trailing edge and a maximum diameter between the leading and trailing edges; c) a diametrically expandable locking ring carried in the annular groove of the female coupling member; and d) an annular collar slidably carried on the male coupling member axially between the trailing edge of the annular rib and the trailing end of the male coupling member, where the annular collar includes an outer circumferential surface having an outer diameter substantially equal to or greater than the maximum diameter of the annular rib and where the annular collar is slidable on the male coupling member from an unlocked position, in which the collar is positioned axially against the annular rib providing a relatively smooth circumferential surface from the trailing edge of the annular rib to the axially extending portion of the cam surface of the annular collar to a locked position, in which the collar is axially spaced from the annular rib to provide an annular gap axially between the collar and the annular rib, where the annular gap is dimensioned for receiving at least a portion of at least a partially contracted locking ring therein.
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