Armstrong, Westerman Hattori, McLeland & Naughton
Projection molten impeller for concave section used in apparatus
 An impeller as used in a projecting construction apparatus for a concave section of a molten-metal-discharging hole is supported on a rotating shaft for redirecting flow of impinging projection material. The impeller includes a plurality of vanes which are attached to the rotating shaft with a specified twisting angle relative to the rotating shaft. A material supplying pipe is directed upon the plurality of vanes, so that, upon impingement of the projection material upon the plurality of vanes, the projection material is projected outwardly and in a direction nearly opposite to the predetermined direction of impingement of the projection material supplied through the material-supplying pipe. 
Kurosaki Refractories Co., Ltd.
C F F C F Y C
C21C F27D F27D C21B F27D Y10S C21C
inventional inventional inventional inventional inventional additional inventional
Hiroyuki Masayuki Sueki
Ito Fujita Kubo