US PATENT SUBCLASS 137 / 830
.~.~.~ Operating at timed intervals (e.g., to produce pulses)

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

803  DF  FLOW AFFECTED BY FLUID CONTACT, ENERGY FIELD OR COANDA EFFECT (E.G., PURE FLUID DEVICE OR SYSTEM) {11}
825  DF  .~ Means to regulate or vary operation of device {3}
829  DF  .~.~ By movable element {3}
830.~.~.~ Operating at timed intervals (e.g., to produce pulses)

DEFINITION

Classification: 137/830

(under subclass 829) Device wherein the movement of said member occurs at a particular frequency to cause a succession of bursts of fluid to be emitted.