IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0435089
(2003-05-09)
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발명자
/ 주소 |
- Grant, Benton H.
- Ward, Kenneth A.
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출원인 / 주소 |
- Grant Airmass Corporation
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대리인 / 주소 |
St. Onge Steward Johnson &
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인용정보 |
피인용 횟수 :
4 인용 특허 :
11 |
초록
▼
A fluid operated control valve for controlling fluid flow of a system which includes a first and a second fluid channels therein, the control valve includes: a hollow casing with closed first and second ends; a piston member slidably disposed within the casing and defining thereby within the casing
A fluid operated control valve for controlling fluid flow of a system which includes a first and a second fluid channels therein, the control valve includes: a hollow casing with closed first and second ends; a piston member slidably disposed within the casing and defining thereby within the casing a first chamber adjacent to the first end of the casing and a second chamber adjacent to the second end of the casing; a first magnet disposed adjacent the first chamber of the casing for attracting the piston member to a first terminal position; a second magnet disposed adjacent the second chamber of the casing for attracting the piston member to a second terminal position. The control valve further includes: an input port disposed adjacent to an intermediate location in the casing; a first output port disposed in the casing in fluid communication with the first chamber; a second output port disposed in the casing in fluid communication with the second chamber; wherein the control valve is adapted to alternately inflate and deflate the two fluid channels of the system through the ports in response to the reciprocal movement of the piston member. Pad systems utilizing the control valve are also disclosed.
대표청구항
▼
1. A fluid operated control valve for controlling fluid flow of a system, the control valve comprising:a hollow casing with closed first and second ends; a piston member slidably disposed within the casing and defining thereby within the casing a first chamber and a second chamber, each chamber havi
1. A fluid operated control valve for controlling fluid flow of a system, the control valve comprising:a hollow casing with closed first and second ends; a piston member slidably disposed within the casing and defining thereby within the casing a first chamber and a second chamber, each chamber having a volume variable depending upon the position of the piston member; a first magnetic member disposed adjacent the first casing end for attracting the piston member to a first terminal position; a second magnetic member disposed adjacent the second casing end for attracting the piston member to a second terminal position; an input port disposed adjacent to an intermediate location in the casing for receiving operating fluid thereto; a first output port disposed in the casing in fluid communication with the first chamber; a second output port disposed in the casing in fluid communication with the second chamber; and a passageway for alternately guiding the operating fluid from the input port to the first chamber and the second chamber depending upon the position of the piston member within the casing, the position of the piston being reciprocally moveable between the two terminal positions when pressure difference between a pressurizing chamber and the other chamber reaches a pressure overcoming attracting force between the piston member and the one then-holding magnetic member. 2. The control valve of claim 1 further including a first vent port disposed between the input port and the first output port, and a second vent port disposed between the input port and the second output port, respectively, for venting fluid from the chambers.3. The control valve of claim 1, wherein the passageway includes a pair of conduits for the alternate guiding of the fluid.4. The control valve of claim 3, wherein the conduits are disposed in the piston member.5. The control valve of claim 3, wherein the piston member further includes a first and a second grooves each disposed at least partially around the circumference of the piston member and respectively in communication with the first and the second conduits for guiding the operating fluid.6. The control valve of claim 1, wherein the first and second magnetic members each include a magnet disposed within the respective chamber and a mating iron slug attached to the piston member.7. The control valve of claim 6, wherein the magnets are adjustable along to the axial direction.8. The control valve of claim 7, wherein the cycle of the pressurization of each channel of the system is adjustable by adjusting the positioning of the magnets.9. The control valve of claim 7, wherein maximum pressure of each channel of the system is adjustable by adjusting a valve adapted to control the fluid flow rate into the input port.10. The control valve of claim 7, wherein the cycle of the pressurization of each channel of the system is adjustable by adjusting a valve adapted to control the vent rate of the system.11. The control valve of claim 6 further including adjustment screws for the adjustment of the axial position of the magnets.12. The control valve of claim 6 further including first and second stop members disposed respectively within the first and the second chamber for limiting the terminal positions of the piston member.13. The control valve of claim 12, wherein the first and second stop members are protrusions extending axially from the respective first and second casing ends.14. The control valve of claim 1 further including a seal disposed between the casing and the piston member.15. The control valve of claim 14, wherein the seal includes three O-ring members, a first one disposed adjacent to an intermediate location of the piston member, and a second and a third ones disposed respectively adjacent to each end of the piston member.16. The control valve of claim 15, wherein the O-ring members are moveable to the axial direction along the piston member upon axial movement of the piston member.17. The control valve of claim 16, wherein the first O-ring member is rollable between a position located on the left of the input port and a position located on the right of the input port, the second O-ring member is rollable between a position located on the left of the first vent port and a position located on the right of the first vent port, and the third O-ring member is rollable between a position located on the left of the second vent port and a position located on the right of the second vent port.18. The control valve of claim 16, wherein the O-ring members are rollable within grooves provided along the circumference of the piston member.19. The control valve of claim 1, wherein the hollow casing and the piston member are made of plastic material.20. The control valve of claim 1, wherein the hollow casing and the piston member are made of metal.21. The control valve of claim 1, wherein the operating fluid is air.22. A fluid operated control valve for controlling fluid flow of a system, the control valve comprising:a hollow casing with closed first and second ends; a piston member slidably disposed within the casing and defining thereby within the casing a first chamber and a second chamber, each chamber having a volume variable depending upon the position of the piston member; a first magnetic member disposed adjacent the first casing end for attracting the piston member to a first terminal position; a second magnetic member disposed adjacent the second casing end for attracting the piston member to a second terminal position; an input port disposed adjacent to an intermediate location in the casing for receiving operating fluid thereto; a first output port disposed in the casing in fluid communication with the first chamber; a second output port disposed in the casing in fluid communication with the second chamber; and a passageway for alternately guiding the operating fluid from the input port to the first chamber and the second chamber depending upon the position of the piston member within the casing, the position of the piston being reciprocally moveable between the two terminal positions when a pressurizing chamber reaches a maximum pressure overcoming attracting force between the piston member and the one then-holding magnetic member. 23. A fluid operated control valve for controlling fluid flow of a system, the control valve comprising:a hollow casing with closed first and second ends; a piston member slidably disposed within the casing and defining thereby within the casing a first chamber and a second chamber, each chamber having a volume variable depending upon the position of the piston member; a first magnetic member disposed adjacent the first casing end for attracting the piston member to a first terminal position; a second magnetic member disposed adjacent the second casing end for attracting the piston member to a second terminal position; an input port disposed adjacent to an intermediate location in the casing for receiving operating fluid thereto; a first output port disposed in the casing in fluid communication with the first chamber; a second output port disposed in the casing in fluid communication with the second chamber; and a passageway for alternately guiding the operating fluid from the input port to the first chamber and the second chamber depending upon the position of the piston member within the casing, the position of the piston being reciprocally moveable between the two terminal positions when a venting chamber reaches a minimum pressure. 24. An amenity system for use with a fluid source for providing operating fluid to the system, comprising:an amenity member including a first and a second fluid channels therein; and a control valve disposed in fluid communication with the fluid source and the fluid channels of the amenity member and for alternately inflating and deflating the fluid channels, the control valve including: a hollow casing with closed first and second ends; a piston member slidably disposed within the casing and defining thereby within the casing a first chamber adjacent to the first end of the casing and a second chamber adjacent to the second end of the casing, each chamber having a volume variable depending upon the position of the piston member; a first magnetic member disposed adjacent the first chamber for attracting the piston member to a first terminal position; a second magnetic member disposed adjacent the second chamber for attracting the piston member to a second terminal position; an input port disposed adjacent to an intermediate location in the casing for receiving the operating fluid thereto from the fluid source; a first output port disposed in the first chamber in fluid communication with the first chamber and the first fluid channel of the amenity member; a second output port disposed in the second chamber in fluid communication with the second chamber and the second fluid channel of the amenity member; and a passageway for alternately guiding the operating fluid from the input port to the first chamber and the second chamber depending upon the position of the piston member within the casing, the position of the piston being reciprocally moveable between the two terminal positions when pressure difference between a pressurizing chamber and the other chamber reaches a pressure overcoming attracting force between the piston member and the one then-holding magnetic mating member, thereby allowing alternate pressurizing of the fluid channels of the amenity member. 25. The amenity system of claim 24 further including a first vent port disposed between the input port and the first output port, and a second vent port disposed between the input port and the second output port, respectively, for venting fluid from the chambers.26. The amenity system of claim 24 utilized for a bed pad system.27. The amenity system of claim 26, wherein the amenity member is a bed pad.28. The amenity system of claim 24 utilized for a seat pad system.29. The amenity system of claim 28, wherein the amenity member is a seat pad.30. The amenity system of claim 24, wherein the passageway of the control valve includes a pair of conduits disposed in the piston member for the alternate guiding of the fluid.
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