Patent ID: 6393208
Filing Date: 2002-05-21
Classification: A45D,F04D,H02K

Abstract:
A pump for transporting a fluid, the pump comprising:a rotary impeller member including a plurality of impeller elements disposed for imparting kinetic energy to the fluid as said impeller member rotates, said impeller member including an electrically conductive portion of a substantially nonmagnetically-permeable material disposed along a rotary path of said impeller member; an impeller driver including a magnetically permeable stator extending in an arc proximate to the rotary path of said conductive portion as said impeller member rotates, said impeller driver including a core portion with an electrically conductive winding for inducing a magnetic field in said stator and an electrically conductive shaded pole portion spaced from said core portion; and means for introducing alternating electrical current to said winding for imparting a rotary force to said electrically conductive portion of said impeller member.