US PATENT SUBCLASS 174 / 30
.~ Insulators


Current as of: June, 1999
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174 /   HD   ELECTRICITY: CONDUCTORS AND INSULATORS

8  DF  WITH FLUIDS OR VACUUM {12}
30.~ Insulators {1}
31 R  DF  .~.~> Axial passage and/or through wall or plate {2}


DEFINITION

Classification: 174/30

(under subclass 8) Structures for electrically insulating at least two objects from each other or an object from ground.

(1) Note. For similar devices not involving the use of fluids, see this class, subclass 137 and indented subclasses. Patents claiming fluid tight joints between various parts of the insulator assembly, where the structure otherwise could be used with solid materials only, are placed in such subclasses.

(2) Note. See Note (8) to the definition of subclass 8 of this class.