| 发明名称 |
RUECKSTROM-SPERRE MIT SICHERHEITS- ABSPERRORGAN |
| 摘要 |
<p>A backflow prevention assembly designed for connection between a main supply line and a service pipe in water supply service, comprising two check valves in series and a relief valve for draining the chamber between the two check valves under certain operating conditions.</p> |
| 申请公布号 |
DE2711974(A1) |
申请公布日期 |
1977.09.29 |
| 申请号 |
DE19772711974 |
申请日期 |
1977.03.18 |
| 申请人 |
ROCKWELL INTERNATIONAL CORP. |
发明人 |
SUTHERLAND,RAY |
| 分类号 |
E03C1/10;F16K1/20;F16K15/03;(IPC1-7):03C1/10 |
主分类号 |
E03C1/10 |
| 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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