Abstract: A coupler that can be configured for easy insertion and removal from an unthreaded cavity within a manifold or other part. The coupler includes an axially movable lock member that also carries a valve member for sealing against a valve seat of a main coupler body. The coupler also has a plurality of radially flexible fingers spaced apart by slots, and a lock member has one or more stop portions that engage the fingers to prevent radial collapse of the fingers for retention of the coupler in the cavity in the part.

Abstract: Improvement in a quick disconnect coupling that includes a tubular coupler half, having a radially outwardly-directed roller on an outer surface portion thereof; a tubular nipple half, having a push-to-connect mechanism, including a cup-shaped member, concentrically surrounding a nipple body portion, this mechanism including a locking device having a basically L-shaped contoured slot including a helically-directed ramp inlet and a locking slot portion; the improvement comprising that the push-to-connect mechanism includes the rotatable journaling of the cup-shaped member, for limited rotational pivoting relative to the nipple half; this mechanism also including a biasing member for concurrently normally biasing the cup-shaped member to an at-rest position relative to the nipple body.