DE3021686A1 - INJECTION DEVICE - Google Patents

Description

UNISEARCH LIMITED, 221-227 Anzac Parade, Kensington, New South Wales, Commonwealth of Australia

Injection device

The invention relates to an injection device, in particular a medical injection device for administering measured Amounts of a liquid medication over an extended period of time.

Injection devices are known, but are conventional constructions bulky and inconvenient and require electrical power sources to drive a motor, which are commonly known can be used in the form of batteries.

The object of the present invention is to provide an injection device which, for. B. in the event that the patient a child is small enough to be able to

710

Bremen / Bremen Office:
P.O. Box / PO Box 10 7127
Hollerallee 32, D-2800 Bremen 1
• Telephone: (0421) * 34 90 71

Facsimile / Telecopier: Rank Xerox 400
Telegr. / Cables: diagram Bremen
Telex: 244 958 bopatd

03 0 0 51/0847

Accounts Bremen:

Bremer Bank, Bremen

(Sort code 290 80010) 100144

Deutsche Bank, Bremen

(Sort code 290 700 50) 111 2002

PSchA Hamburg

(BLZ 200100 20) 1260 83-202 Munich Office / Munich Office: P.O. Box 14 01 08 Schlotthauerstraße 3, D-8000 Munich 5 Telephone: (089) 65 23 21 Tclekop./Telecop .: (089) 2215 69 R X. 400 Telegr. / Cables: Telepatent Munich Telex: 523937 jus d (code: forbo)

BOEHMFRT & BGEHMERl

3021688

room to be carried directly by the person. In this In context, the present invention is for the treatment of internal secretion disorders such as e.g. B. Suitable for diabetes, where daily injections of insulin are common, or e.g. B. also for the infusion of opiates in cancer patients in critical stages.

According to the invention, this object is achieved by a housing For holding a renewable, fragile and liquid-containing ampoule, rechargeable mechanical Devices by whose actuation the ampoule containing the liquid when it is in the appropriate position is broken, as well as outlet devices for dispensing the liquid contents of the ampoule when the affect them by Italian institutions.

A preferred embodiment of the invention provides that the reloadable mechanical devices have a spring.

Change advantageous embodiments of the inventive concept are described in the subclaims.

Further features and advantages of the invention emerge from the claims and from the following description, in which an exemplary embodiment is explained in detail with reference to the drawing. It shows;

Fig. 1 shows a first embodiment of an inventive Injection device;

Fig. 2 is an elevation showing the operation

of the device shown in Fig. 1;

Fig. 3 is a view along the line III - III of Device according to Fig. 1;

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BOEHMERT & BOEHMERT

Fig. 4 is a view of a second embodiment;

Fig. 5 is a view along the line IV-IV of Fig. 4;

Fig. 6 is an enlarged elevation of the embodiment of Fig. 4;

Fig. 7 is an external view of a third embodiment; and

Fig. 8 is an elevation of the embodiment of Fig. 7 on an enlarged scale.

The exemplary embodiments shown describe two injection devices, that work with spring force (Fig. 1-6), and an injection device that works by means of gas pressure (Fig. 7 and 8th).

The injection devices according to FIGS. 1 to 3 have a housing 1 which receives a resettable spiral spring 2 which acts on one end of a pivot lever 3. A window 4 is provided in the housing 1 which shows a calibration which shows the amount of the remaining medicament during each state of use. The amount of the remaining supply of the medicament is indicated by the position of the lever arm 3 'when it passes the window 4 when the ampoule (not shown) located ^{under the lever arm 3 1' breaks.} The contents of the ampoule are dispensed through the outlet nozzle 5.

In Figs. 4-6, the same reference numerals denote similar ones Components as in the exemplary embodiments of FIGS. 1-3. It is it can be seen that in this case the spring 2 acts directly on the outer wall of the ampoule 7. In this embodiment, the spring 2 is provided with a locking device or a projection 8 so that the injection device can be loaded and stored ready for use,

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BOEHMERT & BOEHMERT

wherein in use the projections 8 from the associated Recesses 9 are freed.

7 and 8, an injection device operating with gas pressure is shown shown, the a housing and a tube for receiving the fragile ampoule and a receiving volume 1 ', which is filled with pressurized gas, which is applied to the ampoule acts to push the contents out through the nozzle 5. The absorption volume is determined after the Ampoule is inserted, pressurized via the inlet valve 10. The volume can only be up to a predetermined one Pressure to be filled, since a pressure control valve 11 is set to this value. When it's out For any reason it is desired to take the injection device apart, the pressure chamber can be opened by means of the relief valve 12 can be emptied.

In all of the exemplary embodiments, the amount of the medicament flowing out can be measured by means of a porous measuring membrane or another porous medium placed within the outlet nozzle, or by an additional one Measuring device, which can be separated from the injection device, can be achieved.

The porous nozzle can be part of the ampoule as well as part of the injection device, so it can be thrown away after use or can be used again. If the ampoule is already filled with a sterile drug and with an exgene nozzle and a fitting device for direct connection to an injection cannula is provided, the full cannula can be inserted and after emptying through a fresh cannula made with its own The measuring diaphragm is to be replaced.

030051/0847

BOEHMERT & BOcHMERT

30216!

In the above description, the drawings as well as Features of the invention disclosed in the claims can be used both individually and in any combination for the Implementation of the invention in its various embodiments be essential.

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BOEHMERl- & BOEiIMERT

302188S file: ux 150

REFERENCE NUMBERS 3 CHARACTERISTICS I3TS (LIST OF REFERENCE NUMERALS)

1 Casing; 1 'volume 1 2 Coil spring - P Swivel levers, 3 'and 3 ¹¹ : lever arms 4th window 4th 5 jet 5 6th 6th 7th ampoule 7th 8th Projection, (tension hook) 8th 9 Recesses 9 10 Inlet valve 10 11 Pressure control valve 11 12th Relief valve 12th 15th 15th 14th 14th 15th 15th 16 16 17th 17th 18th 18th 19th 19th 20th 20th 21 21 22nd 22nd 23 25th 24 24 2 ¹ ? 25th ? 6 26th 27 27 28 • 28 29 29 30th 30th

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ORIGINAL INSPECTED

Claims (6)

BOEHMERT & BC) EIIMERT 3021688 UX 150 Expectations 1 . ^N l injection device, characterized by a housing (1) for receiving a renewable, fragile and liquid-containing ampoule (7), rechargeable mechanical devices (2), by actuating the liquid-containing ampoule (7) when it is in the appropriate position is located, is broken, and outlet devices (5) for dispensing the liquid content of the ampoule when the mechanical devices (2) act on them. 2. Injection device according to claim 1, characterized in that the rechargeable mechanical devices (2) a Have spring. 3. Injection device according to claim 2, characterized in that a spring lever is further provided, wherein the lever 030051/0847 O INSPECTED BOEHMERT & BOEHMERT (3 ¹¹ ) is actuated by the spring (2), so that a breaking force acts on the ampoule when it is in the appropriate position. 4. Injection device according to claim 2, characterized in that the housing (1) has a tubular part which has a Takes up spiral spring (2); and that means for compressing the spring protrude from the housing which compresses the spring hold and can be relaxed after inserting an ampoule. 5. Injection device according to claim 1, characterized in that the rechargeable mechanical devices have a refillable Have gas pressure cylinders within the housing or a replaceable pressure cylinder that fits into the housing. 6. Injection device according to one of the preceding claims, characterized in that a measuring nozzle (5) is provided for checking the amount of liquid dispensed from the ampoule during use. 03 0 0 51/0847