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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0424432 (1989-10-20) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 7 인용 특허 : 0 |
A valve actuator for an associated valve which includes apparatus for opening and closing an associated valve and a first housing in which a first diaphragm is disposed to define first and second chambers on respective sides of the first diaphragm. The apparatus also includes a valve actuator having
A valve actuator for an associated valve which comprises: means for opening and closing the associated valve, said means for opening and closing said valve including a crank arm carried on a shaft; a first housing in which a first movable means is disposed to define first and second chambers on resp
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