Patent ID: 6948244

Claim:
A method of making a fluidic oscillator device having at least a power nozzle for projecting a jet of liquid into an interaction region with an upstream end, opposing side walls, opposing top and bottom walls, and a pair of control ports at the upstream end, one control port juxtaposed to the respective sides of said interaction region, an inertance loop passage and an inertance loop connecting said pair of control ports, said opposing side walls diverging from said power nozzle, comprising: providing a mold cavity in which said power nozzle, interaction region and control ports can be molded as a core without any seam lines, filling said mold cavity with a solidifieable plastic, removing said core from said mold cavity, and providing top and bottom inertance plates with channels which form an inertance loop with said inertance loop passage and connecting said pair of control ports for controlling the frequency of oscillation, the said body of the fluidic oscillator device being capable of assembly with top and bottom inertance plates with different lengths of inertance loops, thereby providing oscillations with different operating frequencies.