IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0758277
(2010-04-12)
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등록번호 |
US-8210207
(2012-07-03)
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발명자
/ 주소 |
- Toliusis, Vytautas Joseph
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출원인 / 주소 |
- Toliusis, Vytautas Joseph
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
2 |
초록
▼
A directly piloted valve assembly has a valve body including a bore, at least one inlet port, at least one outlet port and at least one exhaust port or second outlet port wherein the ports are all in fluid communication with the bore. A spool is received in the bore. The spool includes a wall defini
A directly piloted valve assembly has a valve body including a bore, at least one inlet port, at least one outlet port and at least one exhaust port or second outlet port wherein the ports are all in fluid communication with the bore. A spool is received in the bore. The spool includes a wall defining a lumen. An actuator is received in the lumen. The actuator includes a shuttle seal channel. A shuttle seal is received in the shuttle seal channel. A solenoid is connected to the valve body. The wall of the spool includes at least one pilot hole in fluid communication with the lumen defined by the spool and the bore of the valve body.
대표청구항
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1. A directly piloted valve assembly, comprising: a valve body including a bore, at least one inlet port, at least one outlet port, and at least one exhaust port wherein said ports are all in fluid communication with said bore;a spool received in said bore, said spool including a wall defining a lum
1. A directly piloted valve assembly, comprising: a valve body including a bore, at least one inlet port, at least one outlet port, and at least one exhaust port wherein said ports are all in fluid communication with said bore;a spool received in said bore, said spool including a wall defining a lumen said wall including at least one pilot hole in fluid communication with said lumen and said bore;a solenoid actuator received in said lumen, said solenoid actuator including a shuttle seal channel;a solenoid connected to said valve body; anda shuttle seal received in said shuttle seal channel wherein said spool translates in an actuated direction that is opposite to the actuating direction of the said actuator. 2. The valve assembly of claim 1, wherein said shuttle seal channel has a first width of between about 0.211 inches and about 0.215 inches and said shuttle seal has a second width of between 0.063 inches and about 0.057 inches and a ratio of said first width to said second width is between about 3.35 and about 3.77. 3. The valve assembly of claim 1, wherein said shuttle seal channel has a first width of between about 0.236 and about 0.232 inches and said shuttle seal has a second width of between 0.063 and about 0.057 inches and a ratio of said first width to said second width is between about 3.68 and about 4.14. 4. The valve assembly of claim 1, wherein said solenoid includes a coil and a return spring held in a housing and an armature connected to said actuator. 5. The valve assembly of claim 1, wherein said actuator includes a first actuator end seal held in a first end channel on a first side of said shuttle seal channel and a second actuator end seal held in a second end channel on a second side of said shuttle seal channel. 6. The valve assembly of claim 5, wherein said first and second actuator end seals are quad ring lobed seals with at least a portion of said seals being disposed about said actuator under tension so that an outside diameter of said quad ring lobed seals is enlarged. 7. The valve assembly of claim 1, wherein said actuator has a first stroke having a length L1 and said spool has a second stroke of a length L2 where L2 is greater than L1. 8. The valve assembly of claim 7, wherein a ratio of L2 to L1 is between 12.7 and about 9.1. 9. The valve assembly of claim 1, wherein said shuttle seal translates along said actuator between a first end and a second end of said shuttle seal channel. 10. The valve assembly of claim 9, wherein said shuttle seal channel is positioned relative to said at least one pilot hole. 11. The valve assembly of claim 9, wherein said at least one pilot hole is aligned with said shuttle seal channel. 12. The valve assembly of claim 1, wherein said shuttle seal is a quad ring lobed seal. 13. The valve assembly of claim 12, wherein one lobe of said shuttle seal does not seal pressure when both sides of lobe are at approximately equal pressure. 14. The valve assembly of claim 12, wherein said quad ring lobed seal includes an annular groove, between lobes, aligned with said at least one pilot hole when said spool and said actuator are in a first operating position and a second, opposite operating position. 15. The valve assembly of claim 14, further including two radial relief grooves in said spool wall and communicating with said lumen, one relief groove of said two radial relief grooves being provided on each side of said pilot hole so that said shuttle quad ring lobed seal is also axially centered between said two radial relief grooves when said spool and said actuator are at said first and second operating positions. 16. The valve assembly of claim 12, wherein said quad ring lobed seal is positioned relative to said at least one pilot hole when said spool and said actuator are in a first operating position and when said spool and said actuator are in a second, opposite operating position. 17. The valve assembly of claim 16, including a fourth annular groove on said actuator between said first actuator end seal and said shuttle seal channel and a fifth annular groove on said actuator between said second actuator end seal and said shuttle seal channel. 18. The valve assembly of claim 17, wherein said actuator includes a first end and a second end, and wherein said first and second ends of said actuator include piloting guides that allow air to pass to atmosphere. 19. The valve assembly of claim 1, wherein said spool includes a first spool end seal, a second spool end seal, a first spool intermediate seal and a second spool intermediate seal. 20. The valve assembly of claim 19, wherein said first spool end seal, said second spool end seal, said first spool intermediate seal and said second spool intermediate seal are all quad ring lobed seals. 21. The valve assembly of claim 20, wherein said quad ring lobed seals on said spool are disposed about said spool in tension so as to be pulled toward said center of said spool. 22. The valve assembly of claim 20, wherein at least portions of said quad ring lobed seals on said spool are in tension on said spool such that the two outer lobes are at different diameters. 23. The valve assembly of claim 19, wherein a first annular groove is provided in said spool between said first and second spool intermediate seals, a second annular groove is provided in said spool between said first spool end seal and said first spool intermediate seal and a third annular groove is provided between said second spool end seal and second spool intermediate seal. 24. The valve assembly of claim 23, wherein said at least one pilot hole provides communication between said lumen at said shuttle seal channel and said bore at said first annular groove. 25. The valve assembly of claim 24, wherein said at least one pilot hole has a diameter of between 0.031 and about 0.033. 26. The valve assembly of claim 24, wherein said at least one pilot hole has a diameter of between 0.017 and about 0.015. 27. A directly piloted valve assembly, comprising: a valve body including a bore, at least one inlet port, at least one outlet port, and at least one exhaust port wherein said ports are all in fluid communication with said bore;a spool received in said bore, said spool including a wall defining a lumen;an actuator received in said lumen, said actuator including a shuttle seal channel;a shuttle seal received in said shuttle seal channel wherein said shuttle seal translates along said actuator between a first end and a second end of said shuttle seal channel; anda solenoid connected to said valve body;said wall including at least one pilot hole in fluid communication with said lumen and said bore. 28. The valve assembly of claim 27, wherein said at least one pilot hole is aligned with said shuttle seal channel. 29. The valve assembly of claim 27, wherein said channel has a first width of between about 0.236 and about 0.232 inches and said shuttle seal has a second width of between about 0.063 and about 0.057 inches and a ratio of said first width to said second width is between about 3.68 and about 4.14. 30. The valve assembly of claim 27, wherein said solenoid includes a coil and a return spring held in a housing and an armature connected to said actuator. 31. The valve assembly of claim 27, wherein said actuator has a first stroke having a length L1 and said spool has a second stroke of a length L2 where L2 is greater than L1. 32. The valve assembly of claim 31, wherein a ratio of L2 to L1 is between about 12.7 and about 9.1. 33. A directly piloted valve assembly, comprising: a valve body including a bore, at least one inlet port, at least one outlet port, and at least one exhaust port wherein said ports are all in fluid communication with said bore;a spool received in said bore, said spool including a wall defining a lumen;an actuator received in said lumen, said actuator including a shuttle seal channel;a shuttle seal received in said shuttle seal channel; anda solenoid connected to said valve body; wherein said wall includes at least one pilot hole in fluid communication with said lumen and said bore; and said actuator includes a first actuator end seal held in a first end channel on a first side of said shuttle seal channel and a second actuator end seal held in a second end channel on a second side of said shuttle seal channel. 34. The valve assembly of claim 33, wherein said first and second actuator end seals are quad ring lobed seals assembled under tension so that an outside diameter of said quad ring lobed seals are enlarged. 35. The valve assembly of claim 33, wherein said spool includes a first spool end seal, a second spool end seal, a first spool intermediate seal and a second spool intermediate seal. 36. The valve assembly of claim 35, wherein a first annular groove is provided in said spool between said first and second spool intermediate seals, a second annular groove is provided in said spool between said first spool end seal and said first spool intermediate seal and a third annular groove is provided between said second spool end seal and second spool intermediate seal. 37. The valve assembly of claim 36, wherein said at least one pilot hole provides communication between said lumen at said shuttle seal channel and said bore at said first annular groove. 38. The valve assembly of claim 37 wherein said at least one pilot hole has a diameter of between about 0.017 and about 0.015. 39. A directly piloted valve assembly, comprising: a valve body including a bore, at least one inlet port, at least one outlet port, and at least one exhaust port wherein said ports are all in fluid communication with said bore;a spool received in said bore, said spool including a wall defining a lumen;an actuator received in said lumen, said actuator including a shuttle seal channel;a shuttle seal received in said shuttle seal channel, said shuttle seal is a quad ring lobed seal; anda solenoid connected to said valve body;said wall including at least one pilot hole in fluid communication with said lumen and said bore. 40. The valve assembly of claim 39, wherein said quad ring lobed seal includes an annular groove, between lobes, aligned with said at least one pilot hole when said spool and said actuator are in a first operating position and a second, opposite operating position. 41. The valve assembly of claim 40, further including two radial relief grooves in said actuator wall and communicating with said lumen, one relief groove of said two radial relief grooves being provided on each side of said pilot hole so that said shuttle quad ring lobed seal is also axially centered between said two radial relief grooves when said spool and said actuator are at said first and second operating positions. 42. The valve assembly of claim 39, wherein said first spool end seal, said second spool end seal, said first spool intermediate seal and said second spool intermediate seal are all quad ring lobed seals. 43. The valve assembly of claim 42, wherein said quad ring lobed seals on said spool are in tension on said spool so as to be pulled toward said center of said spool. 44. The valve assembly of claim 42, wherein said quad ring lobed seals on said spool are in tension on said spool such that the two outer lobes are at different diameters. 45. The valve assembly of claim 43, including a fourth annular groove on said actuator between said first actuator end seal and said shuttle seal channel and a fifth annular groove on said actuator between said second actuator end seal and said shuttle seal channel. 46. The valve assembly of claim 45, including piloting guides at two ends of said actuator to allow air to pass to atmosphere. 47. A directly piloted valve assembly, comprising: a valve body, said valve body defining a bore, an inlet port, at least one outlet port, and an exhaust port, said inlet port, said at least one outlet port and said exhaust port being in fluid communication with said bore;a spool received in said bore, said spool including a wall defining a lumen, said spool including at least one pilot hole extending through said wall to said lumen, said spool being movable within said bore between a first spool position in which said inlet port is in fluid communication with said outlet port and a second spool position in which said inlet port is not in fluid communication with said outlet port;an actuator extending through said lumen, said actuator defining a shuttle seal channel;a solenoid connected to said valve body, said solenoid capable of moving said actuator between a first actuator position and a second actuator position; anda shuttle seal within said shuttle seal channel, said shuttle seal being movable between a first position at a first end of said shuttle seal channel and a second position at a second end of said shuttle seal channel, wherein said at least one pilot hole is in fluid communication with said shuttle seal channel when said actuator is in said first actuator position and said second actuator position, wherein said at least one pilot hole is in fluid communication with said shuttle seal channel when said spool is in said first spool position and when said spool is in said second spool position. 48. The directly piloted valve assembly of claim 47, wherein said actuator includes a first actuator seal and a second actuator seal, said first actuator seal sealing against said lumen when said spool is in said first spool position, said second actuator seal sealing against said lumen when said spool is in said second spool position. 49. The directly piloted valve assembly of claim 47, wherein said first actuator seal does not seal against said lumen when said spool is in said first position, and wherein said second actuator seal does not seal against said lumen when said spool is in said second spool position. 50. The directly piloted valve assembly of claim 47, wherein said shuttle seal is a quad ring lobed seal.
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