IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0391071
(2006-03-28)
|
등록번호 |
US-7431049
(2008-10-07)
|
발명자
/ 주소 |
- Ricci,Robert S.
- Tugurian,Harry
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
2 |
초록
▼
A valve has a housing defining a bore. Two bottom ports and two side ports in the housing communicate with the bore. Two annular grooves are in the outer surface of a spool received in the bore. A bypass extends within the spool from an annular groove to a bypass port. In one embodiment, the bore ex
A valve has a housing defining a bore. Two bottom ports and two side ports in the housing communicate with the bore. Two annular grooves are in the outer surface of a spool received in the bore. A bypass extends within the spool from an annular groove to a bypass port. In one embodiment, the bore extends only partially through the housing and the bypass port is at an end of the spool. In another embodiment, the bypass port is on the outer cylindrical surface of the spool at a location substantially devoid of annular grooves therein. An actuator permits selective movement of the spool within the bore between a first position in which the first bottom port communicates with the first side port and the second bottom port communicates with the second side port and a second position, in which the first and second bottom ports communicate with each other and the first and second side ports communicate with each other. The valve has reduced dead space, making it desirable for use with aggressive chemical products.
대표청구항
▼
What is claimed is: 1. A valve for withdrawing a flowable product from a container containing a supply of the flowable product, the valve comprising: a housing defining a cylindrical bore having a longitudinal axis, the bore extending only partially through the housing, first and second bottom port
What is claimed is: 1. A valve for withdrawing a flowable product from a container containing a supply of the flowable product, the valve comprising: a housing defining a cylindrical bore having a longitudinal axis, the bore extending only partially through the housing, first and second bottom ports in the housing communicating with the bore, and first and second side ports in the housing communicating with the bore, a cylindrical valve spool received in the bore and axially moveable along the longitudinal axis of the bore, the valve spool comprising an outer cylindrical surface, first and second annular grooves in the outer cylindrical surface and distributed axially therealong, a bypass within the valve spool extending from the second annular groove to a port on the end of the valve spool, the first annular groove being located axially on the spool between the second annular groove and said one end of the valve spool; and a valve spool actuator for selectively sliding the valve spool within the bore between a first position and a second position, wherein when the spool is in the first position the first bottom port communicates with the first side port via the first annular groove and the second bottom port communicates with the second side port via the second annular groove, and wherein when the spool is in the second position the first and second bottom ports communicate with each other through the first annular groove and the first and second side ports communicate with each other through the bypass and the second annular groove. 2. A valve according to claim 1, wherein the bypass through the valve spool comprises an open-ended longitudinal passage extending from within the valve spool to said one end of the valve spool, the open end of the passage being the bypass port. 3. A valve according to claim 1, wherein the bypass has only a single radial bore in the valve spool. 4. A valve according to claim 1, wherein at least one O-ring is received in an annular channel in the outer cylindrical surface of the valve spool to form a seal by engagement of the O-ring with the valve spool and the valve housing, the O-ring consisting essentially of a fully fluorinated elastomeric material. 5. A valve according to claim 4, wherein the at least one O-ring consists essentially of a fully fluorinated elastomeric material. 6. A valve according to claim 1, wherein one of the first and second bottom ports is adapted for connection of a tube thereto and the other of the first and second bottom ports is not adapted for connection of the tube thereto. 7. A valve according to claim 1, further comprising a valve lock operable to selectively restrain the valve spool from movement relative to the housing. 8. A valve according to claim 7, wherein the valve lock comprises a valve spool retainer comprising a threaded shaft threadable into a threaded bore in an end of the valve spool. 9. A valve for withdrawing a flowable product from a container containing a supply of the flowable product, the valve comprising: a housing defining a cylindrical bore having a longitudinal axis, first and second bottom ports in the housing communicating with the bore, and first and second side ports in the housing communicating with the bore, a cylindrical valve spool received in the bore and axially moveable along the longitudinal axis of the bore, the valve spool comprising an outer cylindrical surface, first and second annular grooves in the outer cylindrical surface and distributed axially therealong, a bypass within the valve spool extending from the second annular groove to a port on the end of the valve spool, the first annular groove being located axially on the valve spool between the second annular groove and the bypass port, the bypass port being adjacent an end of the bore; and a valve spool actuator for selectively sliding the valve spool within the bore between a first position in which the first bottom port communicates with the first side port via the first annular groove and the second bottom port communicates with the second side port via the second annular groove and a second position in which the first and second bottom ports communicate with each other through the first annular groove and the first and second side ports communicate with each other through the bypass and the second annular groove, wherein the bypass port is in fluid communication with said adjacent end of the bore. 10. A valve according to claim 9, wherein the bypass has only a single radial bore in the valve spool. 11. A valve according to claim 10, wherein the bypass through the valve spool comprises an open-ended longitudinal passage extending from within the valve spool to said one end of the valve spool, the open end of the passage being the bypass port. 12. A valve according to claim 9, wherein the bore defined by said housing extends only partially through the housing. 13. A valve according to claim 9, further comprising only three O-rings on the outer surface of the valve spool forming seals between the valve spool and the housing. 14. A valve according to claim 13, wherein said only three O-rings consist essentially of a fully fluorinated elastomeric material.
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