Syringe with two variable volume chambers for containing and administering mixtures of products provided separately
OwnerJaime Luis Szapiro, Leonardo Szames +1inventors
InventorsJaime Luis Szapiro, Leonardo Szames, Saul Moreno
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Abstract
A syringe, of the type having two variable volume chambers inside the main cylindrical body, said chambers being separated by a displacing valve assembly, and being capable of housing components which should be mixed prior to injection. The novelty resides in the special conformation of parts and elements constituting said valve assembly, which comprises two cooperating, displacing elastomer portions; one of said portions being comprised by a peripheral, hollow cylindrical body bearing on the cylindrical wall of the main body, the other portion being an inner, solid cylindrical body slidingly bearing on the inner face of the front portion.
Claims7
A syringe for containing, mixing and administering two elements of a medicament comprises:
- a main body having a sidewall defining a chamber;
- moveable valve means dividing the chamber into a proximal variable volume chamber and a distal variable volume chamber;
- medicament outlet communicating with the proximate variable volume chamber;
- a plunger reciprocally movable in the distal variable volume chamber in a first direction and a second direction;
- the moveable valve means comprises (1) a hollow peripheral valve portion sealingly located on the sidewall of the chamber and (2) a rigid inner valve portion movably received in the hollow peripheral valve portion and moveable between a first position for establishing communication between the proximal and distal variable volume chambers and a second position for prohibiting communication between said proximal and distal variable volume chambers, wherein movement of the plunger in the first direction moves the inner rigid valve portion to the first position for mixing the two elements in the distal variable volume chamber and movement of the plunger in the second direction transfers the mixed two elements from the distal variable volume chamber to the proximal variable volume chamber until the plunger abuts the inner rigid valve portion and moves same to the second position upon continued movement of the plunger in the second direction for administering the medicament through the medicament outlet.
Dependencies are inferred from the claim text.