Dual chamber prefillable syringe and a method for the assembly and filling of same
First Claim
1. A dual chamber prefillable syringe for the administration of two medical components, comprising:
- a syringe cylinder (1) comprising a first cylinder piece (2) having two ends and a second cylinder piece (3) having two ends, the first cylinder piece and the second cylinder piece being joined together at respective ends thereof without expanding the diameter at the connecting plane (F), whereby;
the first cylinder piece encloses a first chamber and the second cylinder piece encloses a second chamber,the first cylinder piece (2) being connected at one end thereof with a syringe head (4) and the first cylinder piece further comprising axially extending bypass grooves (5) recessed on the inner wall and being closed at the other end with an undivided movable intermediate plunger (11) over the complete length thereof,the second cylinder piece (3) being closed at one end by means of a movable injection plunger (8) with a plunger rod (9) fittable into it and the second cylinder piece further comprising at this end a finger grip (6) which is fitted as a separate piece to said second cylinder piece.
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Accused Products
Abstract
A fully assembled dual chamber prefillable syringe cylinder for the administration of two components having a syringe barrel which, in both its single cylinder and dual chamber cylinder embodiments, is connected to both a syringe head featuring a tip cap as well as to the finger grips and which is closed at its base by means of a moveable plunger with a plunger rod and into which an intermediate plunger is positioned with the intent of separating first and second chambers from each other and which features a bypass located in a first chamber, as well as to a method for the manufacture and filling of said fully assembled prefillable syringe.
205 Citations
12 Claims
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1. A dual chamber prefillable syringe for the administration of two medical components, comprising:
a syringe cylinder (1) comprising a first cylinder piece (2) having two ends and a second cylinder piece (3) having two ends, the first cylinder piece and the second cylinder piece being joined together at respective ends thereof without expanding the diameter at the connecting plane (F), whereby; the first cylinder piece encloses a first chamber and the second cylinder piece encloses a second chamber, the first cylinder piece (2) being connected at one end thereof with a syringe head (4) and the first cylinder piece further comprising axially extending bypass grooves (5) recessed on the inner wall and being closed at the other end with an undivided movable intermediate plunger (11) over the complete length thereof, the second cylinder piece (3) being closed at one end by means of a movable injection plunger (8) with a plunger rod (9) fittable into it and the second cylinder piece further comprising at this end a finger grip (6) which is fitted as a separate piece to said second cylinder piece. - View Dependent Claims (3, 4, 5, 6, 7, 10, 11, 12)
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2. A prefillable syringe, as in claim wherein the second cylinder piece can be sealed off at its end facing toward the connecting plane (F) by means of an additional moveable auxiliary plunger.
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8. A method for the manufacture and filling a dual chamber prefillable syringe for the administration of two medical components, comprising the following steps:
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manufacturing first and second cylinder pieces of the syringe cylinder; filling the chamber of each cylinder piece separately with a corresponding medical component; subjecting the first cylinder piece to lyophilization, if applicable; sealing the chamber of each cylinder piece separately; and joining the two cylinder pieces together to form the complete syringe cylinder. - View Dependent Claims (9)
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Specification