Syringe Designed to Be Pre-Filled Then Sterilized by Steam Autoclaving
AssigneeLaboratoire Aguettant
InventorPierre Frezza
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Abstract
The invention concerns a syringe comprising: a body including a cylindrical side wall having an open upstream end with an inner annular rim and a downstream end closed by a transverse wall provided with an orifice; a shaft equipped with a plunger having at least two annular sealing lips between which is defined at least one annular chamber. The shaft, which can slide inside the body, defines inside the body an inner chamber designed to be at least partly filled with a content. Delivery passages provided inside the body are configured to communication said annular chamber of the plunger with the outside of the body or with the inner chamber of the body, when the plunger is abutting against the annular rim.
Claims19
A syringe comprising:
- a body comprising a generally cylindrical side wall having an open upstream end in the vicinity of which an inward annular bead is formed, and a downstream end closed by a transverse wall containing an orifice;
- a rod forming a plunger, with a piston at one end forming a seal possessing at least two annular sealing lips between which at least one annular chamber is defined, said rod being designed to be inserted into and slid along the inside of the body;
- an inner chamber designed to be at least partly filled with contents and then being defined between the piston and the transverse wall of the body;
- said syringe being wherein it also comprises means of communication formed in the body of the syringe and designed to place said annular chamber or chambers of the piston in communication with the outside of the body or with the inner chamber of the body, when the piston is inside the body and in contact with the annular bead.
Dependencies are inferred from the claim text.