US PATENT SUBCLASS 137 / 178
.~.~.~ With alternately operated inlet and outlet valves

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

154  DF  DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7}
171  DF  .~ Fluid separating traps or vents {5}
177  DF  .~.~ Discriminating outlet for liquid {4}
178.~.~.~ With alternately operated inlet and outlet valves

DEFINITION

Classification: 137/178

(under subclass 177) Separating traps further provided with a valve controlling a trap chamber inlet which is operated alternately with the outlet valve.

(1) Note. See the main class definition, Lines With Other Classes and Within This Class, Plural Valves, and also Subclass References to the Current Class, for search notes on plural valves in fluid handling systems.

SEE OR SEARCH THIS CLASS, SUBCLASS:

596+, for distribution systems having alternately seated stop and waste valves, and see the search notes thereto.

602+, 627.5 and 861+, for other alternately seated valves.

SEE OR SEARCH CLASS

222, Dispensing, 425+, especially subclasses 445+ and 450+ for dispensers with stationary traps and cut-offs for inlet and outlet, which are

ordinarily alternately seated.