IMPROVEMENTS IN AND RELATING TO PUMPING

摘要

A pump and a method of moving molten metal is provided in which a tube open at one end and closed at the other end cooperates with a secondary tube received within it, open at both ends, to pump metal from the open end of the tube down a space between the tube and secondary tube to the closed end of the tube and then return the metal up the centre of the secondary tube. A simpler way of providing circulation of molten metal is provided.