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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0060575 (1979-07-25) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 15 인용 특허 : 1 |
Methods and apparatus for controlling fluid flow wherein, according to the methods, a pressure-actuated main valve is conditioned to operate by fluid pressure actuation of a pilot valve, which closes a fluid flow passage through the main valve so that the main valve may then be actuated by fluid pre
Method for control of fluid flow through a conduit, comprising providing a pilot valve in the conduit which is normally closed when no fluid is flowing through the conduit and which is closed when fluid is flowing through the conduit in one direction and which is moved to open when fluid is flowing
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