US PATENT SUBCLASS 137 / 826
.~.~ To vary frequency of pulses or oscillations

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}
826.~.~ To vary frequency of pulses or oscillations

DEFINITION

Classification: 137/826

(under subclass 825) Device wherein the output stream of the device is in the form of a succession of bursts of fluid issuing from a single outlet or issuing alternatively from two or more outlets, and wherein the change that is produced is a change in the time interval of or between said bursts of fluid.