F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 7/06 (2006.01) F04D 29/04 (2006.01) F04D 29/22 (2006.01)
Patent
CA 2365612
One aspect of the invention is directed to an impeller made of a non-metallic, heat resistant material, comprising a generally cylindrical shaped body having a central rotational axis, first and second generally planar end faces extending transverse to the central axis and a side wall extending between the first and second faces. A plurality of passages have inlets circumferentially spaced apart from each other on the first face, outlets at the impeller sidewall, and connecting portions extending between the inlets and the outlets transverse to the central axis. Each of the passages extends at an angle to the central axis along substantially an entire length and perimeter of the passages. Another aspect of the invention is directed to an impeller made of a non-metallic, heat resistant material comprising a central hub portion extending along a rotational axis of the impeller and first and second impeller bases extending from the hub portion at opposing end portions of the impeller transverse to the central axis. The first impeller base and the second impeller base, each comprise an outer end face. Vanes extend from the central hub portion between the first and second impeller bases. Cavities are formed between the first and second impeller bases and between adjacent vanes. A plurality of molten metal passages are circumferentially spaced apart from one another in the first end face and the second end face and terminate at the cavities. Pumps for pumping molten metal are designed so as to comprise the cylindrical bodied impeller or the varied impeller.
Gowling Lafleur Henderson Llp
Thut Bruno H.
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