Mixing syringe
First Claim
Patent Images
1. A syringe assembly for storing two different materials separately in readiness for mixing together and for injection as a liquid at the time of use, the combination of;
- a cylinder, a discharge port formed in a wall of said cylinder for communication with the interior of said cylinder, a plunger slidably disposed in said cylinder and projecting from an open end thereof opposite to said discharge port, said plunger forming a first chamber therein, a second chamber formed in said cylinder between said plunger and said discharge port, a movable wall member separating said first and said second chambers from each other, said second chamber being adapted to contain one of the materials to be mixed and said first chamber being adapted to contain the other of said materials, an actuating member supported for axial movement relative to said plunger, one end of said actuating member being connected to said wall and being operative to move said wall to a position communicating said first and said second chambers with each other, said plunger being movable toward said discharge port to displace said mixed materials from said cylinder and lock means for holding said rigid wall member in closed relationship with said plunger during movement of the latter to maintain said first and second chambers isolated from each other.
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Abstract
A single barrel mixing syringe in which one material such as a liquid is stored in the bore of the syringe barrel and another material such as a powder is stored in a chamber formed in a resilient piston head which forms not only the powder containing compartment but also the seals preventing leakage of liquid from the syringe. The two chambers are separated by a wall which may be displaced in one embodiment by differential pressure during movement of the piston portion of the syringe and in another embodiment by a separate plunger which displaces the wall.
83 Citations
4 Claims
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1. A syringe assembly for storing two different materials separately in readiness for mixing together and for injection as a liquid at the time of use, the combination of;
- a cylinder, a discharge port formed in a wall of said cylinder for communication with the interior of said cylinder, a plunger slidably disposed in said cylinder and projecting from an open end thereof opposite to said discharge port, said plunger forming a first chamber therein, a second chamber formed in said cylinder between said plunger and said discharge port, a movable wall member separating said first and said second chambers from each other, said second chamber being adapted to contain one of the materials to be mixed and said first chamber being adapted to contain the other of said materials, an actuating member supported for axial movement relative to said plunger, one end of said actuating member being connected to said wall and being operative to move said wall to a position communicating said first and said second chambers with each other, said plunger being movable toward said discharge port to displace said mixed materials from said cylinder and lock means for holding said rigid wall member in closed relationship with said plunger during movement of the latter to maintain said first and second chambers isolated from each other.
- View Dependent Claims (2, 3, 4)
Specification