DE7246181U - INJECTION SYRINGE - Google Patents

Description

Blinder Glas GmbH, Glaswarenfabrik, 498 Bünde, Erich-Martens-Str. 26 - 32

"Injection syringe"

The subject of the innovation relates to an injection syringe consisting of a cylindrical plastic syringe housing with a cannula on the front, a plastic cannula protective cap and a Syringe housing retractable, filled glass cylinder closed at the rear with a piston.

Injections are given intravenously, intramuscularly, or subcutaneously. To carry out these types of injections are injection syringes, as mentioned above, in a wide variety of designs than the stand the technology became known. Such syringe housings are proposed for subcutaneous injections,

-2-

7248111 H4.7I

in which the ampoules are introduced from the side. With this type of housing there is a certain amount of A secure position of the ampoule in the housing is guaranteed. However, the intermediate floor is missing, which is necessary when the ampoule with the cannula are connected to form a unit. This unit is only punctured shortly before use as a result a partition which is located between the cannula and the ampoule body.

Furthermore, trough-like syringe housings have become known which are used to hold the ampoules are kept open to the rear. With such a Housing has the same a transverse partition wall, which with the front wall is a chamber Forms receptacle for the ampoule neck provided with a crimp cap. Before using the injection syringe, remove the protective cap from the cannula. The ampoule is then pushed into the syringe housing as far as possible so that the rear tip of the cannula pierces the stopper of the ampoule. The contents of the ampoule are extracted with the help of a Piston, which hermetically seals the ampoule to the rear

-3-

72M1I1UI.71

3 -

closes and in which the protective cap can be screwed as a stamp, pressed through the cannula.

The disadvantage of the syringe design described above is that the syringes, in order to maintain sterility, have to be shrink-wrapped in a foil or thermoformed pack. This work process brings sometimes additional expenses, quite apart from the fact that this operation is in the so-called sterile room must be done.

The inventor has set himself the task of adding an improved housing design to the field of injection syringes to enrich, with the filled glass body completely absorbed by the housing can be filled without the inwardly protruding part of the cannula the membrane in the front part of the Pierces the cylinder. As a result of the constructive training on which the task is based it can be said that the entire interior of the syringe is hermetically sealed and remains sterile.

ψ m « ma

The problem posed is achieved according to the innovation in that the syringe housing opposite your glass cylinder is made so long that the same takes up the glass cylinder in its entirety, the The syringe housing is hermetically sealed at the end by means of a film or a stopper, and that the extension of the syringe housing extends conically to approximately the finger rest. Inside, namely in the guide area of the filled glass cylinder, the syringe housing is distributed at a distance three or more cams circumferentially.

Another feature of the innovation is that the syringe housing is in the area of the finger rest is cylindrical on the inside for the purpose of the plug.

The stopper, which can be inserted into the syringe housing, has several spaced apart on the jacket side ring-shaped sealing lips au] ..

• 5-

724 m

Finally, it should also be mentioned that the protective cap for the canoe on the end face facing the syringe housing a circumferential groove which corresponds to the diameter of the glass cylinder corresponds to.

The following description serves to explain the subject of the innovation, an embodiment of which is shown in the drawing.
Show it:

1 shows a longitudinal section through the syringe housing;

Fig. 2 is a plan view of the syringe housing and

3 side view of the syringe housing with glass cylinder and cannula, covering the same Protective cap in section, with the types of closure of the housing indicated are shown.

-6-

72 «181 im. Tl

The syringe housing made of plastic in a known manner is denoted by i in FIGS. The syringe housing 1 is used to hold a glass cylinder 2 filled with injection liquid. At the rear end, the syringe housing 1 merges into a so-called finger rest 3. So that the filled glass cylinder 2 can disappear completely in the syringe housing 1 without the part of the cannula protruding into the same i piercing the membrane in the front part of the filled glass cylinder 2, the syringe housing i is longer than the glass cylinder 2. This extension runs upwards (conically) towards the finger rest 3. After the glass cylinder filled is introduced into the syringe housing 1 2 is the same i using a film of a label k od. Hermetically sealed in "range of the finger pad 3. If a closure by means of film k, label or the like. is not desired, the syringe housing i can also be closed with a stopper 5. In this case, the syringe housing i in the area of the finger rest 3 is cylindrical on the inside over the length of this stopper 5

-7-

/ to

724S1I1HI.7I

educated. The stopper 5 has several circumferential sealing lips 7 for the purpose of a good seal fitted. The two aforementioned types of closure can be seen in Fig. 3, left side.

Before the injection syringe is used, the protective cap 6, which is also referred to as a stamp, is removed from the cannula 9. After piercing the film k or removing the stopper 5 used, the glass cylinder 2 is fully pushed into the syringe housing 1 with the back of the plunger 6, so that the inwardly protruding part of the cannula 9 pierces the membrane of the glass cylinder 2 and with the liquid in Touch comes. So that the glass cylinder 2 can be pushed in properly, the syringe housing 1 has so-called guide cams 8 all the way around on the inside, while a circumferential groove 10 is made on the back of the stamp 6, which corresponds to the diameter and the thickness of the glass cylinder 2 and the end of the same 2 encompasses.

Then the punch 6 is by means of its threaded mouthpiece in the end piston - in the Drawing not shown - the glass cylinder 2 is screwed in and the syringe is ready for injection.

-8th-

Claims (5)

Protection requirements 1. Injection syringe, consisting of a cylindrical plastic syringe housing with a cannula arranged at the front, a plastic cannula protective cap and a filled glass cylinder that can be pushed into the syringe housing and closed at the rear with a plunger, characterized in that the syringe housing (1) is opposite the glass cylinder (2) is designed so long that it fully accommodates the glass cylinder, the syringe housing being hermetically sealed at the end by means of a film (k) or a stopper (5), and that the extension of the syringe housing extends conically to about the finger rest (3) . 2. Injection syringe according to claim 1, characterized in that the syringe housing (1) three or more cams (8) distributed around its inner diameter at a distance for guiding the glass cylinder. -9- 7241181 HH.7I 3. Injection syringe according to claims i and 2, characterized in that the syringe housing (1) is in the area of the finger rest is designed to be cylindrical on the inside for the purpose of introducing the plug (5). 4. Injection syringe according to claims 1 and 3, characterized in that the stopper (5), which is designed to be insertable into the syringe housing (i), has several on the jacket side having spaced apart annular sealing lips (7). 5. Injection syringe according to claims 1 and 2, characterized in that the cannula protective cap (6) on the end face facing the syringe housing (i) has a circumferential Has a groove (10) which corresponds to the diameter of the glass cylinder (2).