Patent ID: 7239056

Claim:
A canned motor for a pump assembly comprising: a rotor assembly consisting of: (i.) a hollow shaft with a bore extending therethough and upon which rotor windings are configured, said hollow shaft having a first hollow shaft end and a second hollow shaft end with a first frictionless bearing on said first hollow shaft end, a second frictionless bearing on said second hollow shaft end, and a mechanical seal on said second hollow shaft end positioned outboard of said second frictionless bearing and sealing said second hollow shaft end in a pump housing; and (ii.) a rotor shaft with a first shaft end and an extending second shaft end, said rotor shaft extending coaxially through and being non-rotatingly coupled to and removable from said hollow shaft without further disassembling said motor; a stator assembly; and an isolating can separating said rotor assembly and said stator assembly.