(under subclass 18) Subject matter comprising plural distinct joints, a tubular member and two or more fixed spaced plates with a combination relationship therebetween whereby the tubular member may be coupled to the plates (e.g., a flue between boiler plates).
SEE OR SEARCH THIS CLASS, SUBCLASS:
31+, for means to insert a section between fixed pipe ends.
154.1+, for pipe to box couplings wherein at least two walls are essential to one joint.
