The invention relates to a high-pressure chamber for preferably atomizing or injecting metered amounts of fluid, such as pharmaceutical preparations. The components of the high-pressure chamber determining the strength thereof are made of a sintered metal body having plastic regions directly attache
The invention relates to a high-pressure chamber for preferably atomizing or injecting metered amounts of fluid, such as pharmaceutical preparations. The components of the high-pressure chamber determining the strength thereof are made of a sintered metal body having plastic regions directly attached thereto. The plastic regions allow corrosion resistance and material compatibility of the interior of the high-pressure chamber and fluids placed under pressure therein. The shape of the sintered metal body provides the entire system with the rigidity required for high-pressure operation and with directly molded connection elements prescribing the type of connection to other components. The components of the high-pressure chamber determining the strength thereof are thereby deformed or crimped to each other, so that inexpensive and quick overall assembly processes are available.
대표청구항▼
1. High pressure chamber in the form of a multi-part pumping chamber with nozzle outlet (12), in which a liquid (2) is placed under pressure up to 5000 bar, wherein said chamber comprises a central part (123), a nozzle holder (133) and a support ring (126), wherein at least one of said central part
1. High pressure chamber in the form of a multi-part pumping chamber with nozzle outlet (12), in which a liquid (2) is placed under pressure up to 5000 bar, wherein said chamber comprises a central part (123), a nozzle holder (133) and a support ring (126), wherein at least one of said central part (123), nozzle holder (133) and support ring (126) consists of a metal,wherein the at least one of said central part (123), nozzle holder (133) and support ring (126) that consists of a metal is at least partly covered by a second material region, wherein the second material region comprises at least one of a central part second material region (123b) directly injection-molded onto the central part (123), a nozzle holder second material region (133b) directly injection-molded onto the nozzle holder (133), and a support ring second material region (126b) directly injection-molded onto the support ring (126), andwherein on the at least one of said central part (123), nozzle holder (133) and support ring (126) that consists of a metal, the second material region forms all surfaces that are in direct contact with the liquid during operation of the chamber. 2. High pressure chamber according to claim 1, wherein the second material region comprises a material that is corrosion-resistant and/or pharmaceutically compatible with the liquid (2) provided for use. 3. High pressure chamber according to claim 1, wherein the material of the second material region is a plastic selected from polypropylene and polyethylene. 4. High pressure chamber according to claim 1, wherein the second material region (123b, 126b, 133b) by virtue of its shape and its material nature, at the junction point of the central part (123) and the nozzle holder (133) or at the junction of the central part (123) and the support ring (126), constitutes a seal for the interior of the high pressure chamber. 5. High pressure chamber according to claim 1, wherein on the nozzle outlet side of the nozzle holder (133) there is at least one channel running therethrough which is open at the top. 6. High pressure chamber in the form of a multi-part pumping chamber with nozzle outlet (12), in which a liquid (2) is placed under pressure up to 5000 bar, and at least one component of the chamber consists of a metal capable of being shaped and/or crimped and is permanently connected to at least one other component of the chamber in a positively locking manner by shaping or crimping, wherein the nature of the connection of the metal component that is to be joined to another component, or the configuration of the crimping, are already predetermined by the shape of support ring connecting element (126c), nozzle holder connecting element (133c), and spring arm (123d) on the metal component, and in that the support ring connecting element (126c) and nozzle holder connecting element (133c) are connected to another component by crimping and take the form of at least two webs or arms bent towards the other component. 7. High pressure chamber according to claim 6, wherein the crimpable metal additionally has the property that the material is strengthened by mechanical forming. 8. High pressure chamber according to claim 6, wherein separate individual components which have sealing and/or filtering and/or liquid-nebulising and/or adjusting functions are enclosed in the high pressure chamber by forming or crimping. 9. High pressure chamber according to claim 6, wherein the webs or arms (support ring connecting element (126c), nozzle holder connecting element (133c)) that are bent during crimping have a width of between 0.8 and 3.6 millimeters and/or a length of between 1.6 and 3.0 millimeters and a material thickness of between 1.5 and 2.5 millimeters. 10. High pressure chamber according to claim 6, wherein the internal capacity of the chamber is 10 to 100 microliters, and/or the high pressure chamber is designed for an excess pressure range of up to 1200 bar. 11. High pressure chamber according to claim 6, further comprising at least one nozzle holder (32,133) and/or a central part (23, 123) and a support ring (25, 126), wherein in one process step at least two of the components are inserted one inside the other and joined together by forming or crimping. 12. High pressure chamber according to claim 11, wherein at least one of the components nozzle holder (133), central part (123) or support ring (126) is provided with a second material region comprising central part second material region (123b), support ring second material region (126b), and nozzle holder second material region (133b), a coating or lining, before the crimping, in a separate injection-moulding process. 13. High pressure chamber according to claim 6, wherein a second material region comprising at least one of a central part second material region (123b), a nozzle holder second material region (133b), and a support ring second material region (126b) is directly injection-molded onto at least one metal component. 14. High pressure chamber according to claim 13, wherein the second material region covers all the surfaces of the metal component that are in direct contact with liquid during operation of the chamber, wherein the second material is selected so that it is corrosion-resistant and/or pharmaceutically compatible with the liquid (2) provided for use. 15. High pressure chamber according to claim 6, wherein the at least one metal component is produced by metal injection molding methods. 16. High pressure chamber according to claim 6, wherein the central part (123) is combined with the support ring (126) to form a single component. 17. High pressure chamber according to claim 6, wherein the central part (123) is combined with the nozzle holder (133) to form a single component. 18. Nebulizer (1) or injector for nebulizing or injecting a liquid (2) medicament formulation, having a high pressure chamber according to claim 6. 19. High pressure chamber in the form of a multi-part pumping chamber with nozzle outlet (12), in which a liquid (2) is placed under pressure up to 5000 bar, wherein said chamber comprises at least two of a central part (123), a nozzle holder (133) and a support ring (126), wherein at least one of said at least two of a central part (123), nozzle holder (133) and support ring (126) consists of a metal,wherein the at least one of said at least two of a central part (123), nozzle holder (133) and support ring (126) that consists of a metal is at least partly covered by a second material region, wherein the second material region comprises at least one of a central part second material region (123b) directly injection-molded onto the central part (123), a nozzle holder second material region (133b) directly injection-molded onto the nozzle holder (133), and a support ring second material region (126b) directly injection-molded onto the support ring (126), andwherein on the at least one of said at least two of a central part (123), nozzle holder (133) and support ring (126) that consists of a metal, the second material region forms all surfaces that are in direct contact with the liquid during operation of the chamber. 20. High pressure chamber according to claim 19, wherein the second material region comprises a material that is corrosion-resistant and/or pharmaceutically compatible with the liquid (2) provided for use. 21. High pressure chamber according to claim 19, wherein the material of the second material region is a plastic selected from polypropylene and polyethylene. 22. High pressure chamber according to claim 19, wherein the second material region (123b, 126b, 133b) by virtue of its shape and its material nature, at the junction point of the central part (123) and the nozzle holder (133) or at the junction of the central part (123) and the support ring (126), constitutes a seal for the interior of the high pressure chamber. 23. High pressure chamber according to claim 19, wherein on the nozzle outlet side of the nozzle holder (133) there is at least one channel running therethrough which is open at the top.
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이 특허에 인용된 특허 (4)
Bartels Frank (Waldbronn DEX) Bachtler Wulf (Mainz DEX) Dunne Stephen T. (Suffolk GBX) Eicher Joachim (Karlsruhe DEX) Freund Bernhard (Gau-Algesheim DEX) Hart William B. (Suffolk GBX) Lessmoellmann C, Atomising nozzle and filter and spray generation device.
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