IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0318669
(2010-05-20)
|
등록번호 |
US-8869826
(2014-10-28)
|
우선권정보 |
EP-09160859 (2009-05-21) |
국제출원번호 |
PCT/IB2010/052250
(2010-05-20)
|
§371/§102 date |
20111103
(20111103)
|
국제공개번호 |
WO2011/098867
(2011-08-18)
|
발명자
/ 주소 |
- Chappel, Eric
- Neftel, Frédéric
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
8 |
초록
▼
The regulator comprises at least a cylinder (2) with a fluid inlet connector (1) for receiving fluid at an inlet pressure and a fluid outlet connector (4) for delivering fluid, at least one chamber (3), a rod (5) in said cylinder with one side submitted to the inlet pressure and the other side submi
The regulator comprises at least a cylinder (2) with a fluid inlet connector (1) for receiving fluid at an inlet pressure and a fluid outlet connector (4) for delivering fluid, at least one chamber (3), a rod (5) in said cylinder with one side submitted to the inlet pressure and the other side submitted to the outlet pressure generating a net force counter-balanced by at least one spring means (7) acting on one side of said rod (5) against said inlet pressure, wherein a fluidic pathway is formed between said rod (5) and said cylinder (2) as the major fluidic resistance of the device, wherein a change of the inlet pressure induces a move of the rod along the axis of the cylinder thereby modifying the fluidic resistance of said fluidic pathway, wherein the fluidic resistance of said pathway varies with the applied pressure at the inlet in a predefined range of pressure, inducing a regulated flow rate in the considered range of pressure.
대표청구항
▼
1. A passive fluid flow regulator comprising at least a cylinder (2) with a fluid inlet connector (1) for receiving fluid at an inlet pressure and a fluid outlet connector (4) for delivering fluid,at least one chamber (3),a rod (5) in said cylinder with a first side submitted to the inlet pressure a
1. A passive fluid flow regulator comprising at least a cylinder (2) with a fluid inlet connector (1) for receiving fluid at an inlet pressure and a fluid outlet connector (4) for delivering fluid,at least one chamber (3),a rod (5) in said cylinder with a first side submitted to the inlet pressure and a second side submitted to the outlet pressure generating a net force counter-balanced by at least one spring means (7) acting on the first or the second side of said rod (5) against said inlet pressure,wherein a fluidic pathway, which includes a channel formed between said rod (5) and said cylinder (2), extending from the first side to the second side of the rod, on a surface of the rod or an inner surface of the cylinder, is formed between said rod (5) and said cylinder (2) as a major fluidic resistance of the regulator, wherein a change of the inlet pressure induces a move of the rod (5) along an axis of the cylinder thereby increasing the fluidic resistance of said fluidic pathway due to an increase of the length of said pathway, wherein the fluidic resistance of said pathway varies with the applied pressure at the inlet in a predefined range of pressure, inducing a regulated flow rate in the considered range of pressure. 2. A regulator as defined in claim 1, wherein said fluidic pathway is formed directly in a space between the outside surface of the rod (5) and the inner surface of the cylinder (2). 3. A regulator as defined in claim 1, wherein the rod (5) has a cavity (10), wherein said cavity is filled with a gas, wherein the volume of the cavity (10) is adjusted to make the density of the rod (5) equal to the density of the fluid, such that it counterbalances its own weight by Archimedes force and makes the system independent from its spatial orientation and reduces the friction forces. 4. A regulator according to claim 1, wherein the position of the rod (5) can be changed by external means. 5. A regulator as defined in claim 1, wherein the surface of the rod (5) and/or of the cylinder (2) or both have been submitted to a hardening process. 6. A regulator as defined in claim 1, wherein the regulator comprises materials that are biocompatible. 7. A regulator as defined in claim 1, wherein it comprises a second spring means as a damper or shock absorber. 8. A regulator as defined in claim 1, wherein the outlet is occluded if the pressure exceeds a predefined safety pressure. 9. A regulator as defined in claim 1, wherein the fluidic resistance of the device remains constant after a predefined operating pressure. 10. A regulator as defined in claim 1 wherein it comprises a particle filter. 11. A regulator as defined in claim 1, wherein parts of the regulator in contact with the fluid are coated with hydrophilic agents. 12. A regulator as defined in claim 1, wherein the flow rate is regulated in the range of pressure 0-40 mbar according to a predefined profile, wherein the mean flow rate in said pressure range varies from 5 ml/h to 50 ml/h, wherein the flow rate at higher pressures increases with said pressure, wherein the valve is a check-valve with an opening threshold that can be adjusted between 0 to 40 mbar. 13. A regulator as defined in claim 1, wherein there is no flow rate by applying a pressure lower than the opening pressure of the regulator, wherein the flow rate versus pressure characteristic shows 3 successive phases by increasing the pressure above said opening pressure, the flow rate respectively increasing, decreasing and finally increasing again. 14. A regulator as defined in claim 1, wherein the flow rate is regulated in the range 0-50 mbar, wherein the flow rate exhibits a maximum at a pressure lower than 50 mbar, and wherein the flow rate exhibits a decrease and a minimum by increasing the pressure between said pressure and 50 mbar, wherein the flow rate exhibits an increase by increasing the pressure above 50 mbar. 15. A regulator as defined in claim 1, wherein the spring (7) is preloaded, pushing the rod (5) against an elastomeric ring (8) in the inlet connector or in the rod and ensuring the tightness of the valve if the difference of pressure between the inlet and the outlet is lower than the threshold value defined by the preload of the spring (7). 16. A regulator, according to claim 15, wherein the preload of the spring (7) is adjustable by external means (22,23). 17. A regulator as defined in claim 1 wherein the regulator comprises position sensors to determine a position of the rod in said cylinder. 18. A regulator as defined in claim 17, wherein said sensors are optical sensors and/or magnetic sensors and/or pressure sensors. 19. A regulator as defined in claim 17, wherein the sensors are powered and monitored by external means. 20. A regulator as defined in claim 1, wherein said fluidic pathway is formed by at least one channel (6) in said rod (5) or in said cylinder (2) or in both. 21. A regulator as defined in claim 20, wherein the channel (6) is parallel to the axis of the cylinder (2) or wherein said channel (6) has the shape of a helix with a pitch. 22. A regulator as defined in claim 21, wherein said channel (6) has a constant depth and width and/or a constant pitch such that the flow rate in the valve is constant in a predefined range of pressures. 23. A regulator as defined in claim 21, wherein said channel (6) has a variable depth and/or width and/or pitch such that the flow rate in the valve is variable.
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