Molten metal impeller and shaft

An impeller and shaft assembly comprising:

• a cylindrical impeller, and
• a shaft member having a connecting end,
• wherein said impeller defines a plurality of channels that align with concave surfaces of said connecting end, and wherein said impeller further defines at least one (1) cement groove that aligns with at least one extended groove of said connecting end, wherein said at least one cement groove aligns with said extended groove forming a chamber therebetween, and wherein at least one planar surface is defined adjacent each of said plurality of channels and are in frictional communication with an outer surface of said connecting end, and
• wherein passages are defined between said channels and said concave surfaces.

An impeller and shaft assembly comprising:

• a cylindrical impeller vane having an upper face, a lower face and a central bore that defines a height that extends from the upper face to the lower face, said central bore includes a plurality of vanes having vane ends that extend in perpendicular relation with said height and channels disposed between the plurality of vanes, and wherein each of said plurality of vanes define at least one planar surface adjacent the vane and the channel, and wherein each of said vane ends include a cement groove, and wherein said central bore further defines a circular ledge adjacent said lower face;
• a shaft member having a connecting end sized to frictionally pass through said circular ledge, a plurality of concave surfaces and extended grooves disposed on a surface between each of said plurality of concave surfaces, and wherein each of said extended grooves include a cavity that is perpendicular to the length of said extended groove;
• and wherein said channels align with said concave surfaces such that passages are defined between an inside wall of each of said channels and said concave surfaces;
• and wherein said cement grooves align with said extended grooves forming a chamber therebetween.