Patent ID: 7045922
Filing Date: 2006-05-16
Classification: F04D,H02K

Abstract:
1. A permanent-magnet synchronous electric motor with isolated rotor for circulation pumps of heating and/or conditioning systems, comprising: a motor casing, a stator in said motor casing with associated coils; a permanent-magnet rotor mounted in a housing isolated from the stator; a shaft integral with the rotor, the shaft being mounted inside a tube having a tapered open end; and at least one bearing means supporting said shaft and being fixed to said housing; at least one of said at least one bearing means comprising: wherein the sleeve piece is formed of an elastomeric material and has a tapered inner portion, and wherein the first portion of the cap is inserted into the tapered inner portion of the sleeve such that the sleeve piece is caused to expand and is pressed tightly between the cap and the tapered end of the tube.