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专利名称：Pump impeller发明人：Freeman, Richard Robert申请号：EP300910.0申请日：190131公开号：EP0331288B1公开日：19940803
摘要：A water pump impeller is shown in Figure 1 which is cast directly onto the shaftby first making a foam pattern of the impeller on the shaft, and then using that patternto foam a mould cavity in which the foam is contained, and casting the molten metal intothe cavity to destroy the foam and form the impeller.
申请人：CONCENTRIC PUMPS LTD
地址：GB
国籍：GB
代理机构：Hands, Horace Geoffrey
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