发明名称 |
Three-way hydraulic valve. |
摘要 |
An open-center three-way hydraulic valve as applicable to hydraulic control circuits of electric circuit-breakers comprises an admission valve-head which is restored to the closed position by a first spring, a drain valve-head which is displaced toward the closed position by a pilot valve, a second spring which is more powerful than the first and tends to close the drain valve-head, and a resilient semi-locking mechanism for retaining the drain valve-head in the open position in opposition to the second spring when the pilot jack is not under pressure. |
申请公布号 |
EP0289386(A1) |
申请公布日期 |
1988.11.02 |
申请号 |
EP19880400914 |
申请日期 |
1988.04.15 |
申请人 |
GRATZMULLER, CLAUDE ALAIN |
发明人 |
GRATZMULLER, CLAUDE ALAIN |
分类号 |
F16K11/048;F16K11/10;F16K31/00;H01H33/34 |
主分类号 |
F16K11/048 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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