US PATENT SUBCLASS 137 / 7
.~.~.~ Controlled by pressure

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

1  DF  PROCESSES {5}
2  DF  .~ With control of flow by a condition or characteristic of a fluid {6}
3  DF  .~.~ Mixing of plural fluids of diverse characteristics or conditions {4}
7.~.~.~ Controlled by pressure

DEFINITION

Classification: 137/7

(under subclass 3) Processes in which the determined condition or characteristic is a pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

87.01+, for self-correlating or proportioning flow systems controlled by the pressure in one or more flow lines or branches.