Patent ID: 6334754
Filing Date: 2002-01-01
Classification: F04D

Abstract:
A turbomolecular pump comprising: a casing; a rotor having a plurality of rotor blades arranged in a plurality of stages in the casing axially thereof; a stator having a plurality of stator blades arranged in a plurality of stages and alternately located between the rotor blades, each of the stator blades having an inner ring portion, an outer ring portion spaced-apart from the inner ring portion, and a plurality of blades connected between the inner and outer ring portions along a circumferential direction thereof, each of the blades having a first end connected to an outer peripheral edge of the inner ring portion and a second end opposite the first end connected to an inner peripheral edge of the outer ring portion; and reinforcing means disposed on the inner ring portion of each of the stator blades along the entire circumference of the inner ring portion for reinforcing the stator blade.