Patent ID: 6549366
Filing Date: 2003-04-15
Classification: G11B

Abstract:
A rotary device comprising:a stationary section; a rotary section surrounded by part of the stationary section and including a rotary main member allowed to rotate with respect to the stationary section and having an outer peripheral surface, and at least one coaxial flat plate-shaped member projecting diametrically from the outer peripheral surface; bearing means including at least a radial dynamic-pressure bearing portion provided intervening between the stationary section and the rotary section, for rotatively supporting the rotary section against the stationary section; and at least one ambient-gaseous fluid guide member disposed on the rotary-section-surrounding part of the stationary section, wherein the fluid guide member is external to the bearing means, and proximate a predetermined region of at least one of respective axial upper and lower faces of the flat plate-shaped member, the fluid guide member having a guide face heading from a predetermined outward portion separated diametrically outward from the outer peripheral surface of the rotary main member and approaching diametrically inward toward an inward portion thereof heading along downstream-ward in the rotational direction of the rotary section, for concentrating ambient gaseous fluid, external to said bearing means and traveling with rotation of the flat plate-shaped member, diametrically inward toward a predetermined position circumferentially on said outer peripheral surface of the rotary main member and applying pressure diametrically with respect to the rotary main member.