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US 2014/0152133 A1Published application
Spindle motor
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsYoung Sam SHIM, Hyun Gi Yang
Life of this patent
Estimating the term…
Abstract
There is provided a spindle motor, including: a sleeve fixed to a base member; a shaft rotatably inserted into the sleeve; and a rotor hub fixed to a top end portion of the shaft to be rotated together therewith and provided with an extension wall to form a liquid-vapor interface together with an outer circumferential surface of the sleeve, wherein the extension wall is provided with a protrusion portion protruded in an inner radial direction so as to reduce leakage of a lubricating fluid.
Claims10
A spindle motor, comprising:
- a sleeve fixed to a base member;
- a shaft rotatably inserted into the sleeve;
- and
- a rotor hub fixed to a top end portion of the shaft to be rotated together therewith and provided with an extension wall to form a liquid-vapor interface together with an outer circumferential surface of the sleeve,
- wherein the extension wall is provided with a protrusion portion protruded in an inner radial direction so as to reduce leakage of a lubricating fluid.
2 more elements
A spindle motor, comprising:
- a base member provided with a mounting portion protruded upwardly in an axial direction;
- a sleeve inserted into the mounting portion;
- a shaft rotatably inserted into the sleeve;
- a rotor hub fixed to a top end portion of the shaft to be rotated together therewith and provided with an extension wall to form a liquid-vapor interface together with an outer circumferential surface of the sleeve;
- and
- a cover member provided at a bottom end portion of the sleeve to prevent leakage of a lubricating fluid,
- wherein an end of the extension wall is provided with a protrusion portion protruded in an inner radial direction so as to reduce the leakage of the lubricating fluid.
4 more elements
Dependencies are inferred from the claim text.