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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0392277 (1982-06-25) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 25 인용 특허 : 2 |
A ram-type valve assembly for well blowout prevention applications and the like. Opposing ram assemblies disposed in ram guideways transverse to the valve bore are each provided with two pistons extending outward of the valve housing having internal passages communicating with respective passages in
In a valve of the ram-type having a housing with a central bore therethrough, a ram guideway transverse to said bore, and a ram slidable along said guideway, improved means for moving said ram comprising: piston support means interconnected to said housing; pressure-responsive cylinder means carried
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