[특허]Fail-close hydraulically actuated control choke

Fail-close hydraulically actuated control choke 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16K-031/143
출원번호	US-0612889 (1990-11-09)
발명자 / 주소	Pettus Ronald G. (Houston TX)
출원인 / 주소	Cooper Industries, Inc. (Houston TX 02)
인용정보	피인용 횟수 : 42 인용 특허 : 0

초록 ▼

A fail-close hydraulically actuated control choke includes a choke with inlet and outlet flow passages intersecting in a cylindrical flow chamber. A reverse acting trim configuration which utilizes downstream pressure to assist in closing includes a flow cage with a wear sleeve of tungsten carbide shrink fitted therein is reciprocable within the flow chamber to control flow between the inlet and outlet flow passages. The flow cage is closed at one end with a stem extending therefrom which is reciprocated by a fail-close hydraulic actuator. The hydraulic actuator includes a pressure responsive piston in combination with a torque operated driving mechanism. The driving mechanism is positioned within the piston and includes a traveling nut assembly to allow manual positioning of the stem and flow cage independently of the position of the piston. The pressure responsive piston is double acting with a boost pressure supplied to the closing side of the piston and a signal pressure supplied to the opening side of the piston. A loss of signal pressure causes the boost pressure to shift the piston, stem and cage to a closed position. Restoration of the signal pressure moves the cage to its original flow controlling position without requiring a resetting of the flow cage position. Additionally, should the hydraulic circuits or pressure responsive piston become inoperable, the torque operated driving mechanism can still reposition the cage as needed.

대표청구항 ▼

A fail-close control choke, comprising: a pressure containing member having an internal flow chamber with an inlet flow passage thereto and an outlet flow passage therefrom, a flow controlling means sealingly and reciprocably retained within said internal flow chamber to control flow between said inlet and said outlet, a means for positioning said flow controlling means, and a pressure responsive means operatively connected to said positioning means for moving said flow controlling means from a first flow controlling position to a closed position in response to a signal pressure, said positioning means operable through and independently of said pressure responsive means to variably position said flow controlling means in said first flow controlling position without moving said pressure responsive means and irregardless of the position of said pressure responsive means and the signal pressure acting thereon, and said flow controlling means biased toward said closed position by pressure in said outlet flow passage.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

Fail-close hydraulically actuated control choke 원문보기

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Fail-close hydraulically actuated control choke 원문보기

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이 특허를 인용한 특허 (42)

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