(under subclass 428) Process including assembling a surrounding circumferential part to a core, either the core or surrounding part being equipped with a spacer element to radially separate the two or joining the surrounding part to the core while maintaining the radial separation.
(1) Note. The separating radial space may be occupied by a layer of insulating material or by a gas such as air.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings),
743, for a process relating to the filling of a cavity in a building structure, i.e., filling a hollow wall.
126, Stoves and Furnaces,
344+, for a hot water heater. 138, Pipes and Tubular Conduits, for a spaced wall tube or receptacle, generally.
220, Receptacles, appropriate subclasses, particularly 62.18, 560.1, and 586+, for multilayer receptacle structure and
918+, for an element for spacing inner and outer walls of a receptacle.
228, Metal Fusion Bonding,
115, for a process of making a multilayer metallic article in which each layer is joined to the adjacent layer and subclass 126 for a process of enclosing a tube or rod with a separate tubular member and bonding the parts together.
