| 摘要 |
A cartridge and nozzle assembly for use in a non-needle injection system is provided. The assembly includes a cartridge (12) having a plunger (24) disposed at a rearward end thereof including a throat (21) at a forward portion thereof with a displaceable outlet valve (46) initially disposed within the throat (21), the outlet valve (46) being formed of resilient material, having at least one axial channel (56, 62) defined in the forward, and rearward portion thereof, between which is disposed a non-channel valve body (58); a nozzle (14) for receiving the cartridge (12); the nozzle (14) defining a rearward cartridge receiving portion, and including a forward portion terminating in, and defining a valve abutment surface (48) with an injection orifice (52) defined therein; and a recessed portion (50), the recessed portion (50) being configured to receive the valve (46) when the valve (46) is displaced to a forwardly disposed position such that the valve (46) is disposed against the valve abutment surface (48) so that the inner portion of the cartridge (12) has fluid access to the orifice (52) via the axial channels (56, 62), and around the valve body (46); a seal (22) dispose d between the cartridge (12), and the nozzle (14) adjacent the forward portion s thereof for at least reducing leakage ofinjection therebetween.
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