Patent ID: 8647058
Filing Date: 2014-02-11
Classification: F04D

Abstract:
1. A cementless pump for pumping molten metal comprising: support structure suspended above molten metal; a motor supported by said support structure; a shaft fastened at an upper end thereof to said motor and having a lower end; an impeller mounted to said lower end of said shaft; a refractory base supported in the molten metal, said base including at least one impeller chamber in which said impeller is rotated and at least one discharge passageway leading from said impeller chamber, said base including through holes each extending for a length and having a size transverse to the length; support posts each fastened at an upper end thereof to said support structure and at a lower end thereof to said base, wherein each of said support posts includes a lower surface at the lower end that is larger than the size of the through hole; refractory sleeves each disposed in one of said through holes, and post fastening members for fastening the lower ends of said posts to said base without cement, wherein a portion of each of said post fastening members is located inside said refractory sleeve, wherein each of said refractory sleeves is disposed between said lower surface of one of said support posts and a respective base engaging portion of a corresponding one of said post fastening members.