Patent ID: 6700273
Filing Date: 2004-03-02
Classification: F04C,H02K

Abstract:
A gas transfer machine for transferring a gas including a corrosive gas comprising:a pump rotor mounted on a rotatable shaft for transferring the gas including a corrosive gas; a reluctance-type motor for rotating said rotatable shaft about its own axis directly coupled thereto said pump rotor and said motor being disposed in a housing; a motor rotor having salient poles said motor rotor being made of highly-corrosion-resistant metal magnetic material, each of said salient poles being a protrusion portion of unitary formed rotating body; a motor stator having magnetic poles; said stator being enclosed in a highly-corrosion-resistant synthetic resin material molding which has a surface position radially inwardly of an inner circumferential surface of said stator, wherein said salient poles of the motor rotor are attracted to rotate by magnetic forces generated by said poles of said stator.