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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
|
출원번호 | US-0293663 (1972-09-28) |
우선권정보 | GB-0045902 (1971-10-01) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 7 인용 특허 : 0 |
A bellows-type valve includes several additional safeguards in the form of back-up seals which are effective to prevent in- or out-leakage should the bellows fail. Some of the seals can be changed while the valve remains closed. There is provision for testing the integrity of the seals while the val
A valve for vacuum applications and of the kind which is provided with a bellows for sealing between a longitudinally movable valve closure member and a stationary body of the valve which carries a seat upon which the valve closure member is engaged to close the valve, characterised in that the valv
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