IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0715827
(2010-03-02)
|
등록번호 |
US-7802589
(2010-10-21)
|
발명자
/ 주소 |
- Oh, Seik
- Winje, James B.
- Williamson, Mark E.
|
출원인 / 주소 |
- Baxter International Inc.
- Baxter Healthcare S.A.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
19 |
초록
A flow control valve includes a stem extending into an interior bore defined by a wall of a flow control member of the valve, the stem and the wall defining therebetween a cylindrical space allowing fluid communication between apertures formed in differing planes of the flow control member.
대표청구항
▼
The invention is claimed as follows: 1. A flow control valve for medical liquid comprising: a housing including an inlet and an outlet; the housing including a first cylindrical wall defining a first interior bore and first and second axially spaced-apart openings extending through the first cylind
The invention is claimed as follows: 1. A flow control valve for medical liquid comprising: a housing including an inlet and an outlet; the housing including a first cylindrical wall defining a first interior bore and first and second axially spaced-apart openings extending through the first cylindrical wall; a flow control member including a second cylindrical wall defining a second interior bore, the flow control member rotatably disposed within the first interior bore and having at least one discrete aperture in a first plane, at least one discrete aperture in a second plane, and a discrete aperture in a third plane; 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 first cylindrical 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 the first cylindrical wall; the flow control member being rotatable between a first position and a second position, in the first position one of the at least one discrete aperture in the first plane being in communication with the first opening in the first cylindrical wall to define a first flow rate out of the discrete aperture in the third plane, and in the second position one of the at least one discrete aperture in the second plane being in communication with the second opening in the first cylindrical wall to define a second flow rate out of the discrete aperture in the third plane different from the first flow rate; and a cylindrical stem extending into the second interior bore defined by the second cylindrical wall of the flow control member, the cylindrical stem and the second cylindrical wall defining an cylindrical space allowing fluid communication between (i) the discrete aperture in the first plane and the discrete aperture in the third plane and (ii) the discrete aperture in the second plane and the discrete aperture in the third plane. 2. The flow control valve of claim 1, wherein (i) one of the discrete apertures in the second plane is in communication with the second opening or (ii) none of the discrete apertures in the second plane is in communication with the second opening when the flow control member is in the first position. 3. The flow control valve of claim 1, wherein fluid flow through the first and second discrete apertures of the first and second planes is combined in the cylindrical space before flowing out the discrete aperture in the third plane. 4. The flow control valve of claim 1, wherein the stem extends upwardly from a base of the housing. 5. The flow control valve of claim 1, wherein the cylindrical space enables fluid flowing through the discrete aperture in the first plane and the discrete aperture in the second plane to be summed. 6. The flow control valve of claim 1, wherein the flow control member defines at least one aperture in a fourth plane spaced between the second and third planes, the at least one aperture of the first, second and forth planes in fluid communication with the cylindrical space. 7. The flow control valve of claim 6, the first cylindrical wall defining a third axially spaced-apart opening aligned to communicate with the at least one aperture in the fourth plane. 8. The flow control valve of claim 7, the flow control member being further rotatable to a third position in which one of the at least one discrete aperture in the forth plane is in communication with the third opening in the first cylindrical wall to define a third flow rate out of the discrete aperture in the third plane. 9. The flow control valve of claim 7, which includes a third tube having a size different from the first and second tubes, the third tube communicating at one end with the inlet or outlet and at the other end with the third opening in the first cylindrical wall. 10. The flow control valve of claim 6, wherein the cylindrical space enables fluid flowing through the discrete aperture in the first plane, the discrete aperture in the second plane and the discrete aperture in the forth plane to be summed. 11. The flow control valve of claim 1, wherein the discrete aperture in a third plane communicates with an annular groove that extends at least partially around an outer circumference of the second cylindrical wall, the annular groove positioned to communicate with the other of the inlet or the outlet regardless of whether the flow control member has been rotated to the first position or the second position. 12. A flow control valve for medical liquid comprising: a housing (32) including an inlet (34) and an outlet (36); the housing (32) including a first cylindrical wall defining a first interior bore and first, second and third axially spaced-apart openings extending through the first cylindrical wall; a flow control member (48) including a second cylindrical wall defining a second interior bore, the flow control member (48) rotatably disposed within the first interior bore and having at least one discrete aperture in a first plane, at least one discrete aperture in a second plane, at least one discrete aperture in a third plane and a discrete aperture in a forth plane; a first flow restrictor communicating at one end with the inlet (34) and at the other end with the first opening in the first cylindrical wall, a second flow restrictor communicating at one end with the inlet (34) and at the other end with the second opening in the first cylindrical wall, and a third flow restrictor communicating at one end with the inlet (34) and at the other end with the third opening in the first cylindrical wall; the flow control member (48) being rotatable between first, second and third positions, in the first position one of the at least one discrete aperture in the first plane being in communication with the first opening in the first cylindrical wall to define a first flow rate out of the discrete aperture in the fourth plane, in the second position one of the at least one discrete aperture in the second plane being in communication with the second opening in the first cylindrical wall to define a second flow rate out of the discrete aperture in the forth plane different from the first flow rate, and in the third position one of the at least one discrete aperture in the third plane being in communication with the third opening in the first cylindrical wall to define a third flow rate out of the discrete aperture in the forth plane different from the first and second flow rates; and a cylindrical stem (70) extending into the second interior bore defined by the second cylindrical wall of the flow control member (48), the cylindrical stem (70) and the second cylindrical wall defining a cylindrical space allowing fluid communication between (i) the discrete aperture in the first plane and the discrete aperture in the forth plane, (ii) the discrete aperture in the second plane and the discrete aperture in the forth plane, and (iii) the discrete aperture in the third plane and the discrete aperture in the forth plane. 13. The flow control valve of claim 12, which when in position for use, the discrete aperture in the forth plane is located elevationally below the first, second and third planes. 14. The flow control valve of claim 12, which when in position for use, the cylindrical space extends at least substantially vertically. 15. The flow control valve of claim 12, wherein at least one of the first, second and third flow restrictors is a small diameter tube. 16. The flow control valve of claim 12, wherein one of the first, second and third positions produces a combination of flows through at least two of the discrete apertures in the first, second and third planes, the combination of flows occurring in the cylindrical space. 17. The flow control valve of claim 12, wherein the discrete aperture in the forth plane communicates with an annular groove that extends at least partially around an outer circumference of the second cylindrical wall, the annular groove positioned to communicate with the outlet of the housing regardless of whether the flow control member has been rotated to the first, second or third positions. 18. A flow control valve for medical liquid comprising: a housing including an inlet and an outlet; the housing including a first wall defining a first interior bore and first and second axially spaced-apart openings extending through the first wall; a flow control member including a second wall defining a second interior bore, the flow control member rotatably disposed within the first interior bore and having at least one discrete aperture in a first plane, at least one discrete aperture in a second plane, and a discrete aperture in a third plane; a first flow restrictor communicating at one end with the inlet and at the other end with the first opening in the first wall and a second flow restrictor communicating at one end with the inlet and at the other end with the second opening in the first wall, the flow control member being rotatable between a first position and a second position, in the first position one of the at least one discrete aperture in the first plane being in communication with the first opening in the first wall to define a first flow rate out of the discrete aperture in the third plane, and in the second position one of the at least one discrete aperture in the second plane being in communication with the second opening in the first wall to define a second flow rate out of the discrete aperture in the third plane different from the first flow rate; and a stem extending into the second interior bore defined by the second wall of the flow control member, the stem and the second wall defining a space allowing fluid communication between (i) the discrete aperture in the first plane and the discrete aperture in the third plane and (ii) the discrete aperture in the second plane and the discrete aperture in the third plane. 19. The flow control valve of claim 18, wherein the stem, the second wall and the space are at least substantially cylindrical. 20. The flow control valve of claim 18, wherein the first wall of the housing is at least substantially cylindrical.
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