(under the class definition) Devices comprising compensating means to unite the members so that one member may turn or rotate freely relative to the other at all times, whereby the strain imposed therebetween due to motion is relieved.
(1) Note. Couplings requiring loosening of a means that normally tightens the joint before strain incurred by relative movement of the members is relieved are classified according to their structural features.
SEE OR SEARCH THIS CLASS, SUBCLASS:
98, for a swivel with a fluid pressure seal.
121.3+, for a swivel in a plural concentric pipe system.
147.1+, for plural serial swivels.
184+, for an adjustable angle coupling. 272.1, for a swivel with an access opening.
283, for a coupling including a detachable hinge.
SEE OR SEARCH CLASS
137, Fluid Handling,
580, for a running joint between movable parts of a distribution system.
