Hot liquid metal pumps

Claim 1

A PUMP OF THE CLASS DESCRIBED COMPRISING, IN COMBINATION, A MOUNTING PLATE, AN IMPELLER HOUSING HAVING TOP AND BOTTOM WALLS VERTICALLY SPACED BY A VERTICAL WALL AND HAVING, AT LEAST, ONE LIQUID INLET OPENING IN ONE OF ITS WALLS AND A LIQUID OUTLET OPENING IN ITS VERTICAL WALL, A CENTRIFUGAL IMPELLER IN SAID HOUSING IN PARALLEL RELATION WITH ITS TOP AND BOTTOM WALLS, THE BOTTOM WALL OF SAID HOUSING HAVING AN OPENING THEREIN OF A SUFFICIENT DIAMETER TO PERMIT THE PASSAGE THERETHROUGH OF SAID IMPELLER, A SINGLE ELONGATED MEMBER ATTACHED AT ITS ENDS TO SAID MOUNTING PLATE AND IMPELLER HOUSING FOR SUPPORTING SAID HOUSING ON SAID PLATE IN DISTANTLY SPACED RELATION THEREWITH; A MOTOR MOUNTED ON SAID PLATE AND HAVING A SHAFT CONNECTED WITH SAID IMPELLER; MEANS CONNECTED WITH SAID PLATE FOR SUSPENDING IT AND SAID HOUSING IN A HORIZONTAL POSITION ABOVE A FLOOR; SAID IMPELLER HOUSING HAVING A THROUGH VERTICAL BORE IN COMMUNICATION WITH THE LIQUID OUTLET OPENING THEREIN, A REMOVABLE PLUG IN THE BOTTOM END OF SAID OPENING, A CIRCULAR RECESS IN THE TOP OF SAID IMPELLER HOUSING SURROUNDING THE VERTICAL BORE THEREIN, A LIQUID DISCHARGE PIPE SEALED AT ITS BOTTOM END IN SAID RECESS AND TERMINATING AT ITS UPPER END IN A DOWNWARDLY TAPERED FLANGE IMMEDIATELY ABOVE SAID MOUNTING PLATE, SAID MOUNTING PLATE HAVING THEREIN A GUIDE OPENING THROUGH WHICH SAID PIPE PROJECTS; A CYLINDRICAL EXTENSION FITTING ATTACHED TO SAID MOUNTING PLATE IN CONCENTRIC RELATION WITH SAID GUIDE OPENING, SAID EXTENSION FITTING