IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0458903
(2006-07-20)
|
등록번호 |
US-7690396
(2010-05-20)
|
발명자
/ 주소 |
- Oh, Seik
- Winje, James B.
- Williamson, Mark E.
|
출원인 / 주소 |
- Baxter International Inc.
- Baxter Healthcare S.A.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
19 |
초록
▼
A flow control valve for medical liquid is disclosed. The valve has a housing including an inlet, an outlet, and a flow path therebetween. A plurality of flow restrictors are located in the flow path to define a plurality of flow streams of differing flow rates. A flow control member is disposed in
A flow control valve for medical liquid is disclosed. The valve has a housing including an inlet, an outlet, and a flow path therebetween. A plurality of flow restrictors are located in the flow path to define a plurality of flow streams of differing flow rates. A flow control member is disposed in the flow path, and has a plurality of discrete apertures in a first region or plane and at least one aperture in a second region or plane spaced apart from the first plane. The flow control member is rotationally movable and defines an annular gap and radial groove which provide fluid communication between the different planes and the outlet regardless of the orientation of the flow control member. The flow control member may be rotated between a first position in which one of the plurality of apertures in the first plane is in communication with one of the flow streams to define a first flow rate through the valve, and a second position in which one of the at least one aperture in the second plane is in communication with a different one of the flow streams to define a second flow rate through the valve different from the first flow rate.
대표청구항
▼
What is claimed is: 1. A flow control valve for medical liquid comprising: a housing including an inlet, an outlet, and a flow path therebetween; a plurality of flow restrictors in the flow path to define a plurality of flow streams of differing flow rates; a flow control member disposed in the flo
What is claimed is: 1. A flow control valve for medical liquid comprising: a housing including an inlet, an outlet, and a flow path therebetween; a plurality of flow restrictors in the flow path to define a plurality of flow streams of differing flow rates; a flow control member disposed in the flow path, the flow control member having a plurality of discrete apertures in a first plane and at least one aperture in a second plane spaced apart from the first plane and at least one aperture in a third plane spaced apart from the first plane and second plane, the flow control member and housing being relatively movable between a first position in which one of the plurality of apertures in the first plane is in communication with one of the flow streams to define a first flow rate through the valve, and a second position in which one of the at least one aperture in the second plane is in communication with a different one of the flow streams to define a second flow rate through the valve different from the first flow rate, the flow control member being configured with an annular groove such that the at least one aperture in the third plane is in communication with the outlet in both the first and second positions. 2. A flow control valve in accordance with claim 1 wherein the flow control member is rotationally received within the housing. 3. A flow control valve in accordance with claim 1 wherein the flow control member includes a plurality of apertures in the second plane. 4. A flow control valve in accordance with claim 3 wherein the flow control member is movable to a position in which of the plurality of apertures in the first plane is in communication with one of the flow streams and one of the plurality of apertures in the second plane is in communication with a different one of the flow streams such that the flow rate through the valve is the sum of the flow rates of one and other fluid streams. 5. A flow control valve in accordance with claim 3 wherein there are a plurality of discrete apertures in each of the first and second planes, each aperture being circumferentially spaced apart within each of their respective planes to provide a plurality of flow rates through the valve. 6. A flow control valve in accordance with claim 1 wherein the flow control member has an engagement region of selected shape for engagement with a complimentary shaped tool to change the flow rate of liquid through the valve. 7. A flow control valve in accordance with claim 6 wherein the engagement region of the flow control member is disposed to restrict tampering with the position of the flow control member. 8. A flow control valve for medical liquid comprising: a housing including an inlet, an outlet, and a flow path therebetween; a plurality of flow regulators disposed in the flow path to define a plurality of differing flow rates wherein a first flow regulator is defined by a tube of a first selected size and a second flow regulator is defined by a tube of a second selected size which is different from the size of the first flow regulator; a flow control member disposed in the flow path, the flow control member having at least one discrete aperture at each of a first, second and third spaced apart locations, the flow control member and housing being relatively movable between a first position in which one aperture in the first location is in communication with one of the flow regulators to define a first flow rate through the valve, and a second position in which one aperture in the second location is in communication with a different one of the flow regulators to define a second flow rate through the valve different from the first flow rate; the flow control member being configured with an annular groove such that at least one of the at least one discrete aperture at the third spaced apart location is in fluid communication with the outlet at both the first and second positions of the flow control member. 9. A flow control valve in accordance with claim 8 wherein the tube defining the first flow regulator has at least one of a different inside diameter and different length of the tube defining the second flow regulator. 10. A flow control valve in accordance with claim 8 wherein the tube defining the first flow regulator has a different length than the tube defining the second flow regulator. 11. A flow control valve in accordance with claim 8 wherein at least one of the tubes defining the flow regulators are fully enclosed with the housing. 12. A flow control valve in accordance with claim 8 wherein the housing comprises a first chamber in which the tubes are located and a second chamber containing the flow control member. 13. A flow control valve for medical liquid comprising: a housing including an inlet, an outlet, and a flow path therebetween; the housing including an annular wall defining an interior bore and first and second axially spaced-apart openings extending through the annual wall; a flow control member rotatably disposed within the interior bore and having a plurality of discrete apertures in a first plane, a plurality of discrete apertures in a second plane and at least one aperture in a third plane; a plurality of tubes, the tubes comprising a first tube having a first size and communicating at one end with one of the inlet or outlet and at the other end with the first opening in the annular wall and a second tube having a size different from the first tube and communicating at one end with the one of the inlet or outlet and at the other end with the second opening in said annular wall; the flow control member being rotatable between at least a first position and a second position, in said first position one of the plurality of apertures in the first plane being in communication with the first opening in said annular wall to define a first flow rate through the valve and in said second position one of the plurality of apertures in the second plane being in communication with the second opening in said annular wall to define a second flow rate through the valve different from the first flow rate, the flow control member being configured with an annular groove such that at least one of the at least one discrete aperture in the third plane is in fluid communication with the outlet regardless of which of the first and second positions the flow control member has been rotated. 14. A flow control valve in accordance with claim 13 wherein one of the apertures on in the second plane is in communication with the second opening when the flow control member is in the first position. 15. A flow control valve in accordance with claim 13 wherein none of the apertures in the second plane is in communication with the second opening when the flow control member is in the first position. 16. A flow control valve in accordance with claim 13 wherein any fluid flow through the apertures in the first and second openings is combined before flowing through the other of the inlet or outlet. 17. A flow control valve in accordance with claim 13 wherein the flow control member defines at least one aperture in a third plane spaced apart from the first plane and the second plane. 18. A flow control valve for medical fluid comprising: a housing including an outlet; a generally elongated flow control member within the housing and extending in a first direction, the flow control member having a first at least one aperture along the length of the member and positioned in a first plane, and a second at least one aperture along the length of the member and positioned in a second plane spaced apart from the first plane, and a third at least one aperture along the length of the member and positioned in a third plane spaced apart from the first and second plane, the first, second and third planes being generally parallel to each other, the flow control member being configured with an annular groove in communication with the third at least one aperture; a plurality of flow restrictors defining a plurality of flow streams, and the flow control member and housing being relatively movable between a first position in which no aperture is in communication with at least one of the flow streams, a second position in which one of the first at least one aperture is in communication with at least one of the flow streams to define a first flow through the valve, and a third position in which one of the second at least one aperture is in communication with a different one of the flow streams to define a second flow through the valve, the annular groove being positioned in the housing such that the annular groove is in communication with the outlet in the first, second and third positions. 19. The flow control valve of claim 18 wherein the flow control member is rotationally received within the housing. 20. The flow control valve of claim 18 wherein the flow control member includes a plurality of apertures in the first plane. 21. The flow control valve of claim 18 wherein the flow control member includes a plurality of apertures in the second plane. 22. The flow control valve of claim 18 wherein the flow control member is movable to a position in which the first at least one aperture is in communication with at least one of the flow streams to define a first flow through the valve and the second at least one aperture is in communication with a different one of the flow streams to define a second flow through the valve, such that the flow rate through the valve is the sum of the flow rates of the first flow and the second flow. 23. The flow control valve of claim 18 wherein the flow control member has an engagement region of selected shape for engagement with a complimentary shaped tool to change the position of the flow control member. 24. The flow control valve of claim 23 wherein the engagement region of the flow control member is disposed to restrict tampering with the position of the flow control member. 25. The flow control valve of claim 18 wherein the flow control member further includes a plurality of discrete apertures in each of the first and second planes, each aperture being circumferentially spaced apart within each of their respective planes to provide a plurality of fluid flows through the valve. 26. The flow control valve of claim 18 wherein the housing further includes a support member that extends in the first direction within the flow control member, an annular flow path being defined between the support member and the flow control member, the flow control member being configured to provide fluid communication between the annular flow path and the annular groove.
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