Patent ID: 6890145
Filing Date: 2005-05-10
Classification: F04D,F05D,Y10S

Abstract:
1. A vacuum pump comprising: a pump case having a gas suction port at an upper surface thereof; a rotor shaft mounted in the pump case for undergoing rotation; a rotor connected to the rotor shaft for rotation therewith, the rotor having inner and outer circumferential surfaces coated with a corrosion-resistant film treated by nonelectrolytic plating; a plurality of rotor blades disposed in the pump case and integrally connected to the outer circumferential surface of the rotor; a plurality of stator blades integrally connected to the pump case so that the rotor blades and the stator blades are alternately positioned and arranged; a drive motor for rotating the rotor shaft; and a balancing body disposed on the inner circumferential surface of the rotor for balancing the rotor during rotation thereof, balancing body being made of a synthetic resin adhesive resistant to heat and corrosion and selected from the group consisting of an epoxy resin, a silicon resin, a polyamide resin, and a polyimide resin.