DE7302548U - INJECTION CARTRIDGE - Google Patents

Description

BEHRINUV, 'FRKE AKTlFNGEi-ELLSCHAFT, Marburg / Lahn

File number: Hoe 73 / b 002 G - Ma 153

Date: January 23, 1973

? injection ampoule

The invention relates to an injection ampoule.

There are already syringes that come from a syringe housing preferably made of plastic and a cylinder ampoule. The cylinder ampoule filled with the drug is used for the injection pushed forward in the syringe housing, whereby the rear tip of the cannula pierces the closure of the cylinder ampoule, so that the drug can be injected from the cartridge through the cannula of the syringe body. With these syringes non-sterile air can pass between the cylinder ampoule and the syringe housing; thus is a source of non-sterility especially given for the end of the cannula. The aim of the invention was to eliminate this source of non-sterility.

A syringe ampoule was found, consisting of a syringe housing and cylindrical ampoule with a flanged piercing plate on one end and a plunger stopper on the other end is closed and in its predefined hole before use the plunger plunger serving as a cannula protective cap ?! in-

Ma 153

is screwed, characterized in that the. Cylinder ampoule carries a sealing ring on the neck below the flange. The sealing ring consists of rubber characteristics suitable for this purpose, often of an elastomer, preferably of silicone rubber. A preferred simple embodiment of the sealing ring is an OF.ing. However, any ring shape whose cross section has a profile adapted to the shape of the ampoule neck, the ampoule or parts of the syringe housing can also be used. The sealing ring can be placed on the neck of the ampoule manually or by machine. The sealing ring can also be placed at a different point on the ampoule if the ampoule has a corresponding annular recess. During contact, the cylinder ampoule with the sealing ring is simply pushed into the plastic housing. If the assembly work is carried out under sterile conditions, the air space around the piercing stopper and the corresponding rear end of the cannula remains sterile after assembly, since the sealing ring no longer allows the passage of outside air and moisture. In the present case , for example, clean rooms generated by laminar flow are preferred.

The invention is illustrated in the drawing and is described in detail as follows:

The syringe ampoule shown in Figure (1) shows the Spritzengt'lr.iuno (1) with finger support (2), which can be made from transparent material VOT-ZUgSWCi ₁ Se tram-Oorcnten plastics. The urgently removed cylindrical ampoule, which is preferably manufactured from rug glass, is labeled (A)., The cylindrical ampoule is cn. One end is closed with a plunger stopper (5), the other end with a PiTrlislfjchvrn-.cVü.u.TjUoppo and a crimp cap (6). The dit: l) turig. ':; rinr, int marked with (7). The cannula (8) with nipple (9) int in the. Spritzcngeihäuse (1) installed. she will

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Covered by the cannula protective cap (10) for reasons of sterility. The cannula protective cap, which can be easily removed, is used after connection with the plunger stopper as a plunger during the injection.

Figure 2 shows enlarged the seat of the sealing ring.

In Figure 3, the sealing ring is as it is preferably used is shown in plan and section.

Claims (1)

Ma 153 Injection ampoule Protection claim: Injection ampoule consisting of a syringe housing and cylinder ampoule, which is closed at one end with a flanged piercing plate, at the other end with a plunger stopper and in its predefined hole before use as a cannula protective cap serving piston plunger is screwed, characterized in that the cylinder ampoule on the neck below the Flare carries a sealing ring.