Patent ID: 8770229

Claim:
A fluidic circuit configured to produce a continuous sequence of periodic pulses of gas or liquid flow having a selected pulse repetition frequency, pulse duration, pulse peak pressure and pulse peak flow rate, comprising: first, second and third fluid flow controlling channels which intersect at a junction which defines a fluid interaction region to define a “Y” configuration having a base leg and right and left diverging arms, respectively, said fluid flow channels having corresponding base leg, right leg and left leg flow axes; said first, base leg fluid controlling channel having a fluid inlet at a first end, a second, downstream end terminating at said Y junction, and having gradually converging walls which are configured to reduce the cross sectional area of fluid flow in the first channel from the first end to the second end to thereby increase fluid velocity to produce a fluid jet along said base leg axis at said junction; said second, right leg fluid controlling channel having an inlet at said Y junction and having a distal end terminating in an enclosed, fluid-tight container having a selected blind volume, wherein the flow axis of said right leg diverges from the axis of said base leg by a first angle; said third, left leg fluid controlling channel having an inlet end at said Y junction and having a distal end terminating in a fluid outlet passage having a selected cross-sectional area, wherein the flow axis of said left leg diverges from the axis of said base leg by a second angle; wherein said second leg channel is in fluid communication with a vent connecting said second leg channel through a selectively configurable interconnect channel to said distal end of said third leg channel; and said first and second angles being on opposite sides of said base leg axis and wherein said second angle is greater than said first angle.