US PATENT SUBCLASS 137 / 87.06
.~.~ For single valve

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

87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
87.05  DF  .~ Plural sensors {1}
87.06.~.~ For single valve

DEFINITION

Classification: 137/87.06

For single valve:

(under subclass 87.05) Subject matter comprising one valve element and wherein the sensors operate only one valve element to control the flow.