(under subclass 399) Subject matter wherein one member has a lateral projection adapted to engage a projection or recess in the other member when rotated to hold the members in coupled relation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
73, for duplicate end couplings having rotary engagement.
292.1, for a molded joint with lug and slot interlock.
307, for a coupling with an essential catch operated by conduit motion.
360+, for similar structure with cam surfaces. 376+, for similar structure with packing.
