IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0997600
(2008-06-13)
|
등록번호 |
US-8757220
(2014-06-24)
|
국제출원번호 |
PCT/EP2008/004747
(2008-06-13)
|
§371/§102 date |
20101212
(20101212)
|
국제공개번호 |
WO2009/149727
(2009-12-17)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Harro Höfliger Verpackungsmaschinen GmbH
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
The invention relates to a metering device for fine grained powder (1), in particular for medicinal powder (1) for pulmonary administration, and to a method for operating the metering device. The metering device comprises a powder pump and a metering mechanism (3), wherein the metering mechanism (3)
The invention relates to a metering device for fine grained powder (1), in particular for medicinal powder (1) for pulmonary administration, and to a method for operating the metering device. The metering device comprises a powder pump and a metering mechanism (3), wherein the metering mechanism (3) comprises a continuous powder passage (4) and at least one metering chamber (5) with an outlet valve (6). The metering chamber (5) branches off from the powder passage (4) at an angle. The metering chamber (5) has a larger cross section than the powder passage (4). The powder (1) is conveyed through the powder passage (4) by means of the powder pump, the at least one metering chamber (5) being filled with the powder (1) in a self-levelling manner. The conveying by means of the powder pump is then interrupted, and at least one target container is filled from the metering chamber (5) with the outlet valve (6) being opened and a residual quantity of powder (1) remaining in the metering chamber (5).
대표청구항
▼
1. A metering device for fine grain powder, in particular for medicinal powder for pulmonary administration, the metering device comprising: a powder pump for conveying the powder;a metering mechanism supplied by the powder pump with the powder;wherein the metering mechanism comprises a continuous p
1. A metering device for fine grain powder, in particular for medicinal powder for pulmonary administration, the metering device comprising: a powder pump for conveying the powder;a metering mechanism supplied by the powder pump with the powder;wherein the metering mechanism comprises a continuous powder passage and at least one metering chamber with an outlet valve, wherein the metering chamber branches off the powder passage at an angle, and wherein the metering chamber has a greater cross-section than the powder passage;wherein the outlet valve comprises a valve needle that extends into an interior of the metering chamber and supports at least one radially projecting loosening device for the powder, wherein the valve needle is adapted to carry out an oscillating movement in a longitudinal direction of the valve needle for loosening the powder. 2. The metering device according to claim 1, wherein the powder passage in operation is arranged horizontally and the metering chamber branches off the powder passage at a right angle and has a longitudinal axis that is arranged vertically. 3. The metering device according to claim 1, wherein several of the metering chamber branch off the continuous powder passage. 4. The metering device according to claim 3, wherein six of the metering chamber branch off the continuous powder passage. 5. The metering device according to claim 1, further comprising a supply line extending from the powder pump to the metering mechanism and a return line returning from the metering mechanism to the powder pump, wherein the powder pump, the supply line, the powder passage, and the return line form a closed circuit for the powder. 6. The metering device according to claim 1, wherein a cross-section of the metering chamber in a connecting area to the powder passage is at least twice as large as a cross-section of the powder passage. 7. The metering device according to claim 6, wherein the cross-section of the metering chamber in the connecting area to the powder passage is at least three times as large as a cross-section of the powder passage. 8. The metering device according to claim 1, wherein the outlet valve opens toward the exterior side of the metering chamber. 9. The metering device according to claim 8, wherein the outlet valve is a conical valve. 10. The metering device according to claim 1, wherein the loosening projection is arranged at an axial spacing to a valve seat of the outlet valve in the interior of the metering chamber. 11. The metering device according to claim 10, wherein the loosening projection is embodied as a plate circumferentially extending about the valve needle. 12. The metering device according to claim 1, comprising a first drive acting on the valve needle for opening and closing the outlet valve and a second drive acting on the valve needle for generating the oscillating movement in the longitudinal direction of the valve needle. 13. The metering device according to claim 12, wherein the second drive is connected in series with the first drive. 14. The metering device according to claim 12, wherein the valve needle extends longitudinally through the metering chamber and the first and second drives engage the valve needle at an end opposite the outlet valve. 15. A method for operating a metering device according to claim 1, comprising: conveying by the powder pump the powder through the powder passage and filling the metering chamber with the powder in a self-leveling filling action;after a lapse of a time interval in which the metering chamber has been filled by the a self-leveling filling action, interrupting conveying of the powder by the powder pump;subsequently, filling at least one target container with the powder from the metering chamber by opening the outlet valve and maintaining a residual quantity of the powder in the metering chamber;causing the valve needle to carry out an oscillating movement in a longitudinal direction of the valve needle for loosening the powder during filling of the powder from the metering chamber into the target container while the outlet valve is open;closing the outlet valve after completion of filling of the target container;resuming conveying of the powder by the powder pump until again a self-leveling filling action of the metering chamber is completed, followed by further filling of target containers and further self-leveling filling of the metering chamber. 16. The method according to claim 15, wherein between two sequentially following fillings of the metering chamber several target containers are filled with the powder from a single metering chamber. 17. The method according to claim 16, wherein between two sequentially following fillings of the metering chamber four target containers are filled with the powder from a single metering chamber. 18. The method according to claim 15, further comprising the steps of determining a filling quantity of the powder in the target container by a weighing cell for the target container and controlling or regulating the outlet valve based on a measuring result of the weighing cell. 19. The method according to claim 15, comprising the step of switching on the second drive only after the outlet valve has been opened. 20. The method according to claim 15, providing a first drive acting on the valve needle and a second drive acting on the valve needle, wherein the first drive effects opening and closing of the outlet valve, and wherein the second drive causes the oscillating movement of the valve needle in the longitudinal direction. 21. The method according to claim 15, wherein the valve needle carries out a stroke movement between an open position and a closed position. 22. The method according to claim 1, wherein the valve needle is adapted to carry out a stroke movement between an open position and a closed position.
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