Patent ID: 6149628
Filing Date: 2000-11-21
Classification: A61M

Abstract:
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.