| 发明名称 |
Pilot operated stepping directional valve and method for single line operation |
| 摘要 |
A piloted rotary two-way "on-off" valve which will couple hydraulic fluid from the valve input to the valve output in the "on" position and then move to the "off" position where it will maintain the pressure on the down stream side while enabling the pressure on the upstream side to be removed.
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| 申请公布号 |
US4813749(A) |
申请公布日期 |
1989.03.21 |
| 申请号 |
US19870137764 |
申请日期 |
1987.12.24 |
| 申请人 |
DRESSER INDUSTRIES, INC. |
发明人 |
CILLES, ARTHUR L. |
| 分类号 |
E21C27/24;E21D9/10;F16K31/163;(IPC1-7):E21C27/24;F16K31/122;F16K31/54 |
主分类号 |
E21C27/24 |
| 代理机构 |
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代理人 |
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