US PATENT SUBCLASS 137 / 414
.~.~.~.~ Flexible diaphragm valve

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

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
409  DF  .~ By float controlled valve {11}
412  DF  .~.~ Servo relay operation of control {1}
413  DF  .~.~.~ Fluid pressure {2}
414.~.~.~.~ Flexible diaphragm valve

DEFINITION

Classification: 137/414

(under subclass 413) Apparatus in which the flow control means is a valve comprising a flexible diaphragm.

SEE OR SEARCH THIS CLASS, SUBCLASS:

777+, for expansible chamber devices, especially subclasses 784+ for the flexible wall type, and subclasses 793+ for diaphragms, per se.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

25+, for fluid servo-motor actuation of valves, and especially subclasses 45 and 46 for those involving diaphragm valves and/or motors.