| 发明名称 |
Pool water level maintenance apparatus and method |
| 摘要 |
An improved water-level control method and apparatus automatically maintains the water level in a pool by selectively filling or draining water as required during the period that the circulating system is not operating.
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| 申请公布号 |
US4373220(A) |
申请公布日期 |
1983.02.15 |
| 申请号 |
US19810228598 |
申请日期 |
1981.01.26 |
| 申请人 |
SELSTED, WALTER T. |
发明人 |
SELSTED, WALTER T. |
| 分类号 |
E04H4/12;(IPC1-7):F16K1/18 |
主分类号 |
E04H4/12 |
| 代理机构 |
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