Pressure compensation device for a two-part container
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B67D-005/42
B67D-005/40
B65D-001/32
B65D-001/00
출원번호
US-0815531
(2004-04-01)
우선권정보
DE-198 51 404(1999-11-07)
발명자
/ 주소
Hochrainer,Dieter
Zierenberg,Bernd
Kladders,Heinrich
Essing,Martin
Wuttke,Gilbert
Hausmann,Matthias
Eicher,Joachim
출원인 / 주소
Boehringer Ingelheim International GmbH
인용정보
피인용 횟수 :
20인용 특허 :
54
초록▼
For medical fluids, two-part containers are used which consist of an inner container and an outer container which is impenetrable to diffusion. The inner container collapses when the fluid is removed. For the purposes of pressure compensation between the gaseous space, disposed between the inner-and
For medical fluids, two-part containers are used which consist of an inner container and an outer container which is impenetrable to diffusion. The inner container collapses when the fluid is removed. For the purposes of pressure compensation between the gaseous space, disposed between the inner-and outer containers, and the surroundings of the two-part container, a pressure compensation device is required by means of which at the same time the loss of fluid through diffusion from the collapsible inner container is kept as little as possible. To that end, at least one channel is used which communicates the gas-filled intermediate space with the surroundings of the two-part container. The time constant for compensation of a pressure differential of a few millibars is within the region of quite a few hours. It is obtained by selecting the length of the channel and channel cross-section. The, at least one, channel can be produced individually, or a plurality of channels can be present in the form of pores in an open-pore sintered material or in a permeable membrane. The pressure compensation device permits storage of the two-part container for many years, and use for many weeks as fluid is being removed in portion-wise manner. During these times, the quantity of fluid in the inner container, or the concentration thereof changes substantially less than with the use of a known two-part container.
대표청구항▼
The invention claimed is: 1. In a two-part container where the two-part container consists of an outer container and an inner container and wherein the inner container contains a partially-to fully-volatile fluid, and further wherein the two-part container is disposed in gas-filled surroundings, an
The invention claimed is: 1. In a two-part container where the two-part container consists of an outer container and an inner container and wherein the inner container contains a partially-to fully-volatile fluid, and further wherein the two-part container is disposed in gas-filled surroundings, and wherein the inner container has walls that are impenetrable to diffusion to only a limited extent vis-횪-vis the fluid it contains, and is collapsible, and wherein the outer container has walls that are impenetrable to diffusion and which walls are rigid, and wherein the outer container is sealingly connected to the inner container and a gas-filled intermediate space is present between the two containers, the improvement which comprises a pressure compensation device having at least one channel which communicates the gas-filled intermediate space between the outer container and the inner container with the gas-filled surroundings of the two-part container, which channel has a cross-sectional surface area with an equivalent diameter of between 10 μm and 500 μm, and the channel further is in length equal to between five thousand times and one tenth of the equivalent diameter of such channel. 2. The two-part container with pressure compensation device as recited in claim 1 wherein the length of the channel is between one hundred times and one tenth as great as the diameter of said channel. 3. The two-part container with pressure compensative device as recited in claim 2 wherein the length of the channel is between ten times and once as great as the diameter of said channel. 4. The two-part container with pressure compensation device as recited in claim 2 characterised by the channel having a round, approximately square, triangular, or trapezoidal cross-section. 5. The two-part container with pressure compensation device as recited in claim 2 characterised by the channel being straight, or shaped in the form of a meander or a spiral or a screw. 6. The two-part container with pressure compensation device as recited in claim 2, characterised by the channel being arranged on the wall of the outer container, or the channel being arranged in an insert which is arranged on the wall of the outer container and which communicates with an opening in the wall of the outer container. 7. The two-part container with pressure compensation device as recited in claim 2, characterised by the channel having a cross-sectional surface area of less than 1 square millimeter. 8. The two-part container with pressure compensation device as recited in claim 2, characterised by a gas-permeable filter being arranged over one end of the channel. 9. The two-pan container with pressure compensation device as recited in claim 8 characterized by the gas-permeable filter being arranged over the end of the channel which communicates with the gas-filled surroundings. 10. The two-part container with pressure compensation device as recited in claim 2, characterised by a sealing foil closing the end of the channel which communicates with the gas-filled surroundings. 11. The two-pan container with pressure compensation device as recited in claim 2, characterised by the channel being a plurality of channels which communicate the gaseous space between the outer container and the inner container with the gas-filled surroundings of the two-part container, wherein such plurality of channels is present in the form of pores in a plate consisting of an open-pore sintered material, and which pores have a mean pore diameter of between 0.1 micrometers and 150 micrometers with a pore volume of between 1% and 40% of the volume of the sintered body. 12. The two-part container with pressure compensation device as recited in claim 2, characterised by the channel being a plurality of channels which are present in a permeable membrane in the form of a foil, a woven cloth or a fleece. 13. The two-part container with pressure compensation device as recited in claim 12, characterised by the plurality of channels which are present in the permeable membrane consisting of a thermoplastics synthetic material, such as polytetrafluorethylene or polyetheretherketone, or the plurality of channels which are present in the permeable membrane consisting of an elastomer such as silicone or latex. 14. The two-part container with pressure compensation device as recited in claim 12, characterised by the plurality of channels which are present in the permeable membrane in the form of a foil of metal, glass or ceramics, and which are arranged in non-uniform or uniform manner. 15. The two-part container with pressure compensation device as recited in claim 14 wherein the metal foil is made of gold, silicium, nickel or a high quality alloy steel. 16. The two-part container with pressure compensation device as recited in claim 11, characterised by the plurality of channels which are present in the form of pores in the plate consisting of open-pore sintered material, selected from polyethylene, polypropylene, polyvinylidene fluoride, glass, quartz, ceramics or metal. 17. The two-part container with pressure compensation device as recited in claim 2, characterised by the outer container being made of metal.
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