Patent ID: 7033337
Filing Date: 2006-04-25
Classification: A61M

Abstract:
1. An injector device for delivery of liquid from a high pressure source, the device comprising a) a pressure chamber comprising a pressure barrel of substantially constant cross-section, defining a pressure chamber axis, adapted for accommodation of at least one piston therein and having a front end opening for ejection of the liquid, the pressure chamber being of sufficient strength to sustain the pressure of liquid from a high pressure source; b) a storage chamber, for the liquid or liquid precursor components, comprising a storage barrel with at least a section of substantially constant cross-section, defining a storage chamber axis, adapted for accommodation of at least one piston therein, optionally with a by-pass section therein; c) a liquid connection between the pressure chamber and the storage chamber adapted to allow transfer of the liquid from the storage chamber to the pressure chamber; d) at least a first piston arranged for travel in the pressure barrel; and e) a mechanism adapted to apply force, directly or indirectly, on the first piston when in the pressure barrel to create said liquid pressure; wherein