Patent ID: 6053890
Filing Date: 2000-04-25
Classification: A61M

Abstract:
In a needle-free single use injection device of a pharmaceutical product, the device having a cap relatively movable relative to a device body for triggering a percussion member contained in the body, a cartridge mounted to a delivery end of the device, the cartridge containing the product and driven by the percussion member, and the cartridge comprising:a receptacle of preselected material and containing a single use quantity of the pharmaceutical product;a single orifice formed in the receptacle for providing an exit for a jet of injected pharmaceutical product;an envelope made of a preselected material and molded over the receptacle;an end cap removably covering a delivery end of the cartridge that includes the single orifice;an elastomeric seal located in a central portion of the end cap for sealing the orifice;and further wherein the end cap has lateral walls which enclose the delivery end of the cartridge, the walls of the end cap being provided with raised zones allowing them to be clipped into impressions provided on the outer lateral walls of the cartridge, thus ensuring that the end cap is held on the cartridge.