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Dual chamber prefillable syringe and a method for the assembly and filling of same

  • US 5,788,670 A
  • Filed: 12/22/1995
  • Issued: 08/04/1998
  • Est. Priority Date: 12/22/1994
  • Status: Expired due to Term
First Claim
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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.

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