US PATENT SUBCLASS 137 / 87.04
.~.~ Pressure differential

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

87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
87.03  DF  .~ Flow rate responsive {1}
87.04.~.~ Pressure differential

DEFINITION

Classification: 137/87.04

Pressure differential:

(under subclass 87.03) Subject matter wherein the sensor is detecting the variation of the fluid pressures at two distinct points along one of the flow lines and in response thereto the sensor controls the flow in the other flow line.

SEE OR SEARCH THIS CLASS, SUBCLASS:

101, for the self-proportioning flow system responsive to flow comparison or pressure differential.