Patent ID: 7803129

Claim:
A method for needleless injection of a liquid substance into a target biological tissue, comprising: generating a high velocity jet of gas; generating droplets of the liquid substance; supplying and conveying the droplets of the liquid substance into the high velocity jet of gas; and guiding the high velocity jet of gas through a channel toward a surface of the target biological tissue for injecting the conveyed droplets of the liquid substance into the target biological tissue; wherein generating the droplets of the liquid substance comprises: containing the liquid substance into a reservoir; interposing a perforated membrane between the reservoir and the channel in such a manner that the flow of the high velocity jet of gas is guided along a face of the perforated membrane on a side of the perforated membrane opposite to the reservoir of the liquid substance; and pressurizing the reservoir containing the liquid substance to force the liquid substance from the liquid reservoir through the perforated membrane to thereby produce a jet of the liquid substance that transforms into a stream of the droplets supplied within the high velocity jet of gas laterally of the direction of the flow said high velocity jet of gas.