Patent ID: 6689101
Filing Date: 2004-02-10
Classification: A61M

Abstract:
An injector device for delivery of liquid from a high pressure source, the device comprising(a) a housing, (b) a pressure chamber comprising a pressure barrel for accommodation of at least one piston therein and having a front end opening for ejection of liquid, the pressure chamber being of sufficient strength to sustain the liquid pressure, (c) a piston inserted in the pressure barrel, (d) a storage chamber for liquid or liquid precursor components, the storage chamber being separate from the pressure chamber yet attached to the housing, (e) a conduit between the pressure chamber and the storage chamber, and (f) a pressurizing mechanism in the housing arranged to apply force, directly or indirectly, on the piston in the pressure barrel to create said liquid pressure, wherein i) the pressure chamber, the piston and at least a part of the conduit are arranged as a unit, and ii) the unit and the housing have corresponding fitting parts adapted for releasable attachment of the unit to the housing and the conduit to the storage chamber in a position permitting fluid connection between the storage chamber and the pressure chamber through the conduit and adapted to permit the pressurizing mechanism to act on the piston.