(under subclass 39.01) Devices wherein means are provided to permit relative movement between parts to compensate for expansion and contraction.
SEE OR SEARCH CLASS
285, Pipe Joints or Couplings,
187, for a coupling with means to compensate for expansion and contraction, and subclasses 223+, 261+, 266+, and 302 for pipe joints or couplings which permit relative movement. See the Search Notes thereunder.
403, Joints and Connections,
34+, for two members connected by a flexible diaphragm or bellows, subclasses 52+ for articulated members and subclass 220 for two members connected by flexible means.
