IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0443062
(2007-09-25)
|
등록번호 |
US-8333337
(2012-12-18)
|
우선권정보 |
DE-10 2006 045 407 (2006-09-26) |
국제출원번호 |
PCT/EP2007/008330
(2007-09-25)
|
§371/§102 date |
20091106
(20091106)
|
국제공개번호 |
WO2008/037430
(2008-04-03)
|
발명자
/ 주소 |
- Nabih, Othman
- Schlenker, Dirk
|
출원인 / 주소 |
- Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung E.V.
|
대리인 / 주소 |
Antonelli, Terry, Stout & Kraus, LLP.
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
A valve unit is disclosed for the interruption or release of a pressurized flow of a medium along a hollow duct, which flows along the hollow duct, as well as a preferred use of the valve unit in a dosing system and a method for the metered discharge of a medium from a cartridge-needle configuration
A valve unit is disclosed for the interruption or release of a pressurized flow of a medium along a hollow duct, which flows along the hollow duct, as well as a preferred use of the valve unit in a dosing system and a method for the metered discharge of a medium from a cartridge-needle configuration, with a cartridge connected to the needle configuration via at least one hollow duct with an open cartridge end, to which a pressurizing means is applied, which is capable of driving the medium provided inside the cartridge in the direction of the needle configuration for discharge by applying pressure. The invention has at least in a section along the hollow duct in which at least one first magnet unit is mounted to be axially movable longitudinally along the flow direction of the medium through the hollow duct, for generating a first magnetic field, a second magnet unit providing second magnetic field interacting with the first magnetic field in such a way that a magnetic force which mutually attracts the magnet units axially acts between the first and the second magnet units, and a mechanical stop along the hollow duct, against which the first magnet unit is drivable using a retention force which may be generated by the magnetic force.
대표청구항
▼
1. A valve unit for interrupting or releasing a pressurized flow of a medium flowing along a hollow duct, comprising: at least one section along the hollow duct including at least one first magnet unit which generates a first magnetic field and which is axially movable at least along a pressurized f
1. A valve unit for interrupting or releasing a pressurized flow of a medium flowing along a hollow duct, comprising: at least one section along the hollow duct including at least one first magnet unit which generates a first magnetic field and which is axially movable at least along a pressurized flow direction of the medium through the hollow duct;a second magnet unit which generates a second magnetic field interacting with the first magnetic field so that a magnetic force mutually axially attracting the magnet units acts between the at least one first and the second magnet units;a mechanical stop in the hollow duct, against which the at least one first magnet unit is drivable by a retention force which is generated by the magnetic force, and the at least one first magnet unit assumes an axial position, exclusively at which the retention force axially moves the at least one first magnet unit in the hollow duct to seal the hollow duct to be fluid-tight, while the medium loads the at least one first magnet unit to be pressurized axially against a direction of action of the retention force;a unit for generating a variable force acting against the retention force on the at least one first magnet unit to control opening and sealing of the hollow duct; anda spacer located in the hollow duct between the at least one first magnetic unit and the second magnetic unit and at a position downstream from the second magnetic unit during the pressurized flow, the spacer permitting flow of the medium in the hollow duct around or through the spacer and with the at least one first and the second magnetic units being separated by an axial spacing during the pressurized flow of the medium, and wherein the retention force at the axial spacing between the at least one first and the second magnetic units is less than the retention force when the at least one first magnet unit seals the hollow duct. 2. The valve unit according to claim 1, wherein: the second magnet unit is fixed along the hollow duct. 3. The valve unit according to claim 1, wherein: the second magnet unit partially encloses the hollow duct annularly in at least one section or at least partially indirectly or directly defines the hollow duct. 4. The valve unit according to claim 1, comprising; the spacer is fixed and has a thickness which provides at least part of the axial spacing and the retention force at the axial spacing. 5. The valve unit according to claim 4, wherein: the fixed spacer comprises a perforated disc which radially encloses the hollow duct in a section. 6. The valve unit according to claim 5, comprising: the fixed spacer is located at a channel cross-section of the hollow duct and a perforated disc which is smaller than a cross-section of the hollow duct at the hollow duct and along which the first magnet unit is axially movable. 7. The valve unit according to claim 4, comprising: a sealing means disposed in the flow direction downstream from the spacer element and upstream from the at least one first magnet unit, the sealing means being pressed to be fluid-tight against the spacer element by the at least one first magnet unit, if the at least one first magnet unit is located in the axial position, exclusively in which the at least one first magnet unit seals the hollow duct to be fluid-tight. 8. The valve unit according to one of claim 1, wherein: the hollow duct has a hollow duct cross-section, which is larger than a cross-section of the at least one first magnet unit, is disposed in the axial area of the hollow duct along which the at least one first magnet unit is mounted to be movable, to provide a cavity which may have medium flow therein which is radially between a hollow duct wall of the hollow duct and the at least one first magnet unit. 9. The valve unit according to one of claim 1, wherein: a section of the hollow duct at which the at least one first and second magnet units are located is modular and is enclosed by a housing providing two attachment adapters for a fluid-tight connection to a hollow line. 10. The valve unit according to claim 9, wherein: the attachment adapters are Luer-lock attachments. 11. The valve unit according to claim 1, wherein: the medium to be discharged in a dosed form is gaseous or liquid. 12. The valve unit according to claim 1, wherein: one of the magnet units is a permanent magnet and the other magnet unit comprises ferromagnetic material. 13. The valve unit according to claim 1, wherein: the unit with a variable force acting against the retention force on the at least one first magnet unit varies application of pressure on the medium. 14. The valve unit according to claim 13, wherein: the unit is a pump for delivering the medium with a variable pressure through the hollow duct. 15. The valve unit according to claim 1, wherein: the second magnetic unit is a permanent magnet or electromagnet unit, which is separate from the hollow duct and generates an external magnetic field which may be caused to interact with the at least one first magnet unit. 16. The valve unit according to claim 15, wherein: the second magnet unit for generating the external magnetic field is movable in relation to the at least one first magnet unit and is transferable into at least first and second positions, the magnetic field at the first keeping the at least one first magnet unit in an open position, at which the at least one first magnet unit is spaced apart from the mechanical stop with the operating pressure loading the at least one the first magnet unit by the unit for generating a variable force acting against the retention force, and at the second position, the at least one first magnet unit sealing the hollow duct to be fluid-tight. 17. The valve unit according to claim 1, wherein: the at least one first magnet unit is spherical and has a ball diameter which is larger than a diameter if the hollow duct cross-section;the second magnet unit sectionally encloses or forms the hollow duct; andthe at least one first magnet unit presses directly against the second magnet unit and seals the hollow duct to be fluid-tight. 18. A valve unit according to claim 1, comprising: a dosing system for metered discharge of a medium from a cartridge and needle configuration, the cartridge being connected to the needle configuration via at least one hollow duct and including a cartridge end which is open, to which a pressurizing means is applied, for driving the medium by applying pressure inside the cartridge in the direction of the needle configuration for providing the metered discharge;wherein the valve unit is disposed along the hollow duct; and comprisesthe unit for generating a variable force comprises means for varying application pressure applied to the medium, or an external permanent or electromagnetic unit, positioned separately from the hollow duct and which generates an external magnetic field, which interacts with the at least one first magnet unit for deflecting the at least one first magnet unit against the retention force jointly with the means for varying application pressure. 19. The valve unit according to claim 18, wherein: the means for varying application pressure is a piston unit providing pressure axially in the cartridge which is open on one side to the medium stored therein. 20. The valve unit according to claim 18, wherein: the means for varying application pressure comprises a pressurized fluid line, which is attached to the cartridge which is open on one side; andthe pressurized fluid in the pressurized fluid line acts on the medium stored in the cartridge. 21. The valve unit according to claim 20, comprising: a fluid bypass line disposed along the fluid line upstream from a connection to the cartridge through which a part of the fluid flow passing in the fluid line may be diverted; andthe fluid bypass line has an open line end which is adjacent to a needle of the needle configuration. 22. The valve unit according to claim 18, wherein: the means for varying application pressure provides a variable or switchable pressure force acting through the means for varying application pressure on the at least one first magnet unit from a force value which is greater than the retention value force to a force value which is less than the retention value force and vice versa. 23. The valve unit according to claim 18, wherein: the external magnet unit is spaced apart from the needle configuration and opposite thereto in a longitudinal needle direction. 24. The valve unit according to claim 23, wherein: the external magnet unit is axially movable between at least first and second positions in a longitudinal needle direction, the first position providing the external magnetic field which maintains the at least one first magnet unit in an open position, at which the at least one first magnet unit is spaced apart from the mechanical stop by the axial spacing, with the operating pressure loading the at least one first magnet unit by the means for varying application pressure against the retention force, and at the second position, the first magnet unit sealing the hollow duct to be fluid-tight.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.