NEEDLELESS SYRINGE COMPRISING INJECTOR WITH NESTED ELEMENTS

PROBLEM TO BE SOLVED: To provide a needleless syringe for injecting an active principle for therapeutic purposes. SOLUTION: A syringe has no needle for injecting an active principle 7 initially set between an injector 1 comprising at least an injection nozzle and being contacted with the skin, and a wall 8 mobile under the effect of a propelling system 9 pressurizing and expelling the active principle through the injector located at the syringe downstream end 2. In order to produce nozzles in a considerable injector thickness and to control the jet coherence distance, said injector 1 comprises at least two elements 3, 4, the contact surfaces of which are oriented towards the skin, at least a groove forming an injection nozzle in the assembly of the elements. COPYRIGHT: (C)2005,JPO&NCIPI