US PATENT SUBCLASS 137 / 207.5
.~.~ With return of liquid to supply


Current as of: June, 1999
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137 /   HD   FLUID HANDLING

154  DF  DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7}
206  DF  .~ Gas pressure storage over or displacement of liquid {5}
207.5.~.~ With return of liquid to supply


DEFINITION

Classification: 137/207.5

(under subclass 206) Apparatus in which the liquid in one part of the system is allowed to flow back, is forced back, or is by-passed back to the source of supply, in order to empty the system for cleaning, storage, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

239, for fluid handling systems of general application having means for reversing the normal direction of flow of the fluid for assisting in the cleaning of such systems.

SEE OR SEARCH CLASS

222, Dispensing,

318, for dispensing devices embodying discharge assisting means and having a bypass or return to supply.