| 发明名称 |
Downstream sealing device |
| 摘要 |
There are disclosed alternative embodiments of a downstream sealing gate valve of the type in which a pair of seats are carried within the body of the valve for sealing between the body and either side of the gate.
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| 申请公布号 |
US4577834(A) |
申请公布日期 |
1986.03.25 |
| 申请号 |
US19850704915 |
申请日期 |
1985.02.25 |
| 申请人 |
OLIVER, JOHN P. |
发明人 |
OLIVER, JOHN P. |
| 分类号 |
F16K3/02;F16K3/20;(IPC1-7):F16K3/20 |
主分类号 |
F16K3/02 |
| 代理机构 |
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