Device for delivering a liquid, the device comprising a pump and a valve
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-049/10
A61M-001/00
출원번호
US-0439855
(2007-09-03)
등록번호
US-8167581
(2012-05-01)
우선권정보
FR-06 53560 (2006-09-04)
국제출원번호
PCT/FR2007/051863
(2007-09-03)
§371/§102 date
20090304
(20090304)
국제공개번호
WO2008/029051
(2008-03-13)
발명자
/ 주소
Schneeberger, Niklaus
Vallet, Véronique
Chappel, Eric
출원인 / 주소
Debiotech SA
대리인 / 주소
The Webb Law Firm
인용정보
피인용 횟수 :
0인용 특허 :
11
초록▼
A device for delivering a liquid including a pump, and an anti-siphon valve external to the pump is disclosed. The anti-siphon valve includes an inlet channel connected to the outlet duct of the pump, and an outlet channel, between which a seat and a moving member are disposed that are suitable for
A device for delivering a liquid including a pump, and an anti-siphon valve external to the pump is disclosed. The anti-siphon valve includes an inlet channel connected to the outlet duct of the pump, and an outlet channel, between which a seat and a moving member are disposed that are suitable for co-operating together and that define, between the inlet channel and the outlet channel, a leaktight liquid flow zone. The moving member is suitable for going from an opening position making it possible for liquid to flow through the flow zone, to a closure position in which the moving member comes into contact with the seat of the valve and prevents any flow through the flow zone, the moving member being subjected to the pressure of a reference chamber that is not in fluid communication with the outlet channel.
대표청구항▼
1. A device for delivering a liquid, which device comprises: a pump of a positive displacement type having an inlet valve, an outlet valve and an inlet duct suitable for being connected to an upstream liquid reservoir and connected to said inlet valve of the pump, said inlet valve of the pump being
1. A device for delivering a liquid, which device comprises: a pump of a positive displacement type having an inlet valve, an outlet valve and an inlet duct suitable for being connected to an upstream liquid reservoir and connected to said inlet valve of the pump, said inlet valve of the pump being placed downstream of the inlet duct, an outlet duct connected to said outlet valve of the pump, which outlet valve is made of a rigid material,an anti-siphon valve external to the pump and having an inlet channel connected directly to the outlet duct of the pump, and an outlet channel, disposed between the inlet channel and the outlet channel are a seat and a moving member that co-operate together and that define, between the inlet channel and the outlet channel, a leaktight liquid flow zone, the moving member having a top surface and a bottom surface; anda reference chamber that is not in fluid communication with the outlet channel and having a reference pressure (Pref), the top surface of the moving member being in contact with a fluid contained within the reference chamber having the reference pressure (Pref),wherein said moving member moves from an opening position allowing the liquid to flow through said liquid flow zone, to a closure position in which the moving member comes into contact with the seat of the anti-siphon valve and prevents a flow through said liquid flow zone, when said moving member is subjected to at least said reference pressure (Pref), wherein said reference pressure (Pref) is substantially equal to a pressure prevailing, when the pump is at rest, in the inlet duct of the pump, and wherein the seat or the moving member of said anti-siphon valve comprises a pliable material. 2. The device according to claim 1, wherein the moving member is in the opening position when said anti-siphon valve is in an equilibrium position in which pressures in the inlet channel (Pin), in the outlet channel (Pout), and in the reference chamber (Pref) are mutually equal; wherein the moving member goes into its closure position, from said equilibrium position of the anti-siphon valve, if the pressure in the outlet channel (Pout) decreases at least by a value of a predetermined outlet pressure threshold (Tout), the pressures in the inlet channel (Pin) and in the reference chamber (Pref) remaining constant;and wherein the moving member goes into its closure position, from said equilibrium position of the anti-siphon valve, if the pressure in the reference chamber (Pref) increases at least by an absolute value of a predetermined inlet pressure threshold (Tin), the pressure in the outlet channel (Pout) remaining constant. 3. The device according to claim 2, wherein said outlet channel of the anti-siphon valve is connected to an injection line, and said predetermined outlet pressure threshold (Tout) is less than an inverse of a siphon pressure (−Psiph) prevailing in the anti-siphon valve, if said injection line is disposed vertically with a distal end downwards. 4. The device according to claim 1, wherein the pump is a micropump. 5. The device according to claim 1, wherein said anti-siphon valve comprises a valve body in which said inlet channel, said liquid flow zone, and the outlet channel are formed. 6. The device according to claim 5, wherein said moving member comprises a flexible film that is fastened in a leaktight manner to a surface of the valve body, and which extends along said liquid flow zone. 7. The device according to claim 6, wherein said flexible film is made of an elastic material. 8. The device according to claim 1, wherein said reference chamber is in communication with the inlet duct of the pump. 9. The device according to claim 1, wherein the reference chamber is subjected to a pressure (Pref) as the pressure (Pres) prevailing in the liquid reservoir. 10. The device according to claim 1, wherein said liquid reservoir has a variable volume. 11. The device according to claim 10, wherein said liquid reservoir comprises a stationary reservoir body and a moving reservoir wall defining a cavity of said liquid reservoir. 12. The device according to claim 11, wherein said moving reservoir wall is formed of a flexible film that is made of a polymer material. 13. The device according to claim 12, wherein said moving reservoir wall is made of an elastic material. 14. The device according to claim 12, wherein said anti-siphon valve comprises a valve body in which said inlet channel, said liquid flow zone, and the outlet channel are formed and wherein said moving member comprises a flexible film that is fastened in a leaktight manner to a surface of the valve body, and that extends along said liquid flow zone, and wherein said flexible film of the moving member and the flexible film of said moving reservoir wall are made as a unitary flexible film. 15. The device according to claim 14, wherein said unitary flexible film comprises a flexible first layer and a pliable second layer that is situated on a face of the unitary flexible film that faces towards the liquid reservoir and towards the seat of the anti-siphon valve. 16. The device according to claim 11, wherein said anti-siphon valve comprises a valve body in which said inlet channel, said liquid flow zone, and the outlet channel are formed and wherein said valve body and said stationary reservoir body are formed in a single piece forming a stationary body. 17. The device according to claim 16, wherein said anti-siphon valve and said liquid reservoir are defined by a same surface of said stationary body forming the valve body and the stationary reservoir body. 18. The device according to claim 17, wherein said moving reservoir wall is formed of a flexible film that is preferably made of a polymer material, wherein said moving member is formed of a flexible film that is fastened in a leaktight manner to a surface of the valve body, and that extends along said liquid flow zone, wherein said flexible film of the moving member and the flexible film of said moving reservoir wall are made as a unitary flexible film, and wherein said unitary flexible film is fastened against a same surface of the stationary body in a leaktight manner so as to form said liquid flow zone of said anti-siphon valve and the cavity of said liquid reservoir. 19. The device according to claim 18, wherein said unitary flexible film is fastened in a leaktight manner against said stationary body by an ultrasound welding, by a heat-sealing, or by a laser welding. 20. The device according to claim 18, wherein said unitary flexible film is fastened in a leaktight manner against said stationary body by an adhesive bonding. 21. The device according to claim 18, wherein said unitary flexible film is fastened in a leaktight manner against said stationary body by a precision fitting under a pressure. 22. The device according to claim 16, wherein said liquid reservoir further comprises a cover mounted on said stationary reservoir body, said moving reservoir wall being received between said cover and said stationary reservoir body, wherein said cover is mounted on said stationary body and wherein said cover and said stationary body define a space that comprises said liquid reservoir and said reference chamber. 23. The device according to claim 22, wherein said pump has a compression ratio that is higher than the ratio of the absolute opening pressures of the inlet and the outlet valves so that said pump is self-priming in the absence of the anti-siphon valve. 24. The device according to claim 23, wherein the pump has a pumping volume that is smaller than 10 μl. 25. The device according to claim 24, wherein the pump is manufactured using a micro-machining technology. 26. The device according to claim 23, wherein the pump has a pumping volume that is smaller than 1 μl. 27. The device according to claim 23, wherein the pump has a pumping volume that is smaller than 500 nl. 28. The device according to claim 11, wherein said moving reservoir wall is fastened in a leaktight manner to an outside surface of the stationary reservoir body. 29. The device according to claim 11, wherein said liquid reservoir further comprises a cover mounted on said stationary reservoir body, said moving reservoir wall being received between said cover and said stationary reservoir body. 30. The device according to claim 29, wherein said reference chamber is formed in a space defined between the cover and the moving reservoir wall. 31. The device according to claim 9, wherein the pressure (Pres) prevailing in said liquid reservoir is substantially equal to a pressure prevailing outside the liquid reservoir. 32. The device according to claim 1, wherein the liquid reservoir comprises a stationary reservoir body and a moving reservoir wall defining a cavity of the liquid reservoir, wherein the moving reservoir wall comprises a material that can deform without being elastic. 33. The device according to claim 32, the moving member and the moving reservoir wall together form a single film, wherein a reservoir portion of the single film is secured in a leaktight manner to the stationary reservoir body so that the liquid reservoir can be filled with a varying volume of a liquid without gases being present in the liquid reservoir, and wherein a valve portion of the single film is secured between the inlet channel and the outlet channel of the anti-siphon valve such that the valve portion of the single film is adapted to move between the opening position, in which liquid flows through the liquid flow zone, and the closure position, in which liquid is prevented from flowing through the liquid flow zone. 34. The device according to claim 1, wherein the bottom surface of the moving member faces the seat of the anti-siphon valve.
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