Patent ID: 7749187
Filing Date: 2010-07-06
Classification: A61M

Abstract:
1. A needleless injection device including a lower part receiving an agent cartridge and an upper part providing the energy needed for the injection, the upper part containing energy store units, including at least one start unit and at least one supplementary unit, capable of elastic form-change, the device further comprising: a lock mechanism maintaining tension of the energy store units and a release mechanism for releasing the lock mechanism; a tubular section of the lower part, provided with an external thread, extending into the upper part, the external thread coupling with an internal thread provided in the upper part, wherein the lower part is attached to the upper part in a revolving manner, and is movable telescopically within the upper part for producing a tension state of the energy store units; and a spacer moveable independently of the at least on supplementary unit within the upper part, the spacer maintaining a uniform longitudinal space between the at least one start unit and the lock mechanism from the time the tension state of the energy store units is produced until the lock mechanism is released, wherein: