| 发明名称 |
Helicoidal ramp dropshaft |
| 摘要 |
A vertical dropshaft having internal helicoidal ramps for dissipating the energy of liquid passing through the dropshaft and for exhausting air entrained by the falling liquid up the center of the dropshaft.
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| 申请公布号 |
US4790355(A) |
申请公布日期 |
1988.12.13 |
| 申请号 |
US19870029522 |
申请日期 |
1987.03.23 |
| 申请人 |
UNIVERSITY OF IOWA RESEARCH FOUNDATION |
发明人 |
KENNEDY, JOHN F. |
| 分类号 |
F16L55/02;(IPC1-7):D21F1/68 |
主分类号 |
F16L55/02 |
| 代理机构 |
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代理人 |
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| 地址 |
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