发明名称 |
Rotor, means and method of making the same by moulding. |
摘要 |
<p>A pump impeller comprises a hub surrounded by a web which is a surface of revolution about, and whose imaginary projection intersects, the hub axis, the web carrying helico- centrifugal vanes with both faces of each vane parallel and formed as acute helicoids about the hub axis. The impeller is made by constructing a plastic pattern having vanes 12, using the pattern to form a sand mould, withdrawing the pattern from the sand with a helical movement and then filling the mould cavities with liquid metal. <IMAGE></p> |
申请公布号 |
EP0061947(A1) |
申请公布日期 |
1982.10.06 |
申请号 |
EP19820400385 |
申请日期 |
1982.03.05 |
申请人 |
ETS. POMPES GUINARD SOCIETE DITE: |
发明人 |
CHADAINEAU, JOEL;DEGAY, MICHEL |
分类号 |
F04D29/24;B22C9/10;B22C9/22;B22D25/02;B29C41/00;B29C45/00;B29C45/26;B29C45/37;B29C45/44;B29L31/08;F04D29/22;(IPC1-7):04D29/22;22C9/22;22C9/10 |
主分类号 |
F04D29/24 |
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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