Patent ID: 6200033
Filing Date: 2001-03-13
Classification: F16C,Y10T

Abstract:
A hydrodynamic gas bearing, comprising:a shaft body having an outer periphery, a peripheral direction extending around said outer periphery, and an axial direction extending along an axis of said shaft body, and a cylindrical bearing body arranged around the shaft body with a space therebetween in a radial direction; whereinsaid shaft body has a hollow portion extending in said axial direction and defining an inner periphery of said shaft body,in a cross section perpendicular to said axis of said shaft body, said hollow portion having a not-complete-round, symmetrical shape with respect to a line passing through a center of said cross section, and whereinas a first distance from the center of said cross section to said inner periphery of said hollow portion changes along said peripheral direction of said shaft body, a second distance from the center of said cross section to said outer periphery of shaft body changes along the peripheral direction of said shaft body.