Patent ID: 6942645
Filing Date: 2005-09-13
Classification: A61M

Abstract:
1. A needleless syringe for injection of a liquid active principle, comprising: a reservoir; an injector comprising at least one injection conduit; and a thrust means subjected to the action of a gas generator, the thrust means comprising an end which is directed toward the active principle and constitutes a delivery head having a cross section equal to a cross section of the reservoir, the reservoir situated between the injector and the thrust means, an opposite end of the thrust means is directed toward the gas generator and has a drive head with a cross section greater than the cross section of the delivery head; wherein the delivery head is formed as one piece, and in that the drive head is active along a drive travel of the drive head in a drive cylinder of the drive head, the drive travel being less than the height of the reservoir of liquid active principle.