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AssigneeLTS Lohmann Therapie-Systeme AG
InventorRudolf Matusch
Estimating the term…
A unidirectional injector having at least one cylinder-piston unit, the piston thereof being displaceable between two stroke end positions relative to the cylinder, wherein the cylinder-piston unit comprises at least one sealing system sealing a compensating space from the surroundings. To this end the piston is provided at its front surface with an axial annular groove for accommodating a seal ring or a permanently elastic seal material, that the cylinder is provided with a first seal element and a second seal element which are spaced by at least a piston stroke, or that the piston is provided with the first seal element and the second seal element which are spaced by at least a piston stroke, or the cylinder carries the first seal element and the piston carries the second seal element which is displaced with respect to the first by the piston stroke.
In combination with a disposable injector (4) having at least one cylinder-piston unit (100), the piston (111) of which can move between two stroke end positions in relation to the cylinder (101), the cylinder-piston unit (100) comprising at least one sealing system (121) that seals a compensating space (135) from the surroundings (9), the improvement which comprises:
Dependencies are inferred from the claim text.