Dynamic pressure bearing device
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United States of America Patent
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-
Mar 14, 2000
Grant Date -
N/A
app pub date -
Dec 9, 1997
filing date -
Dec 10, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A dynamic pressure bearing device comprises a rotary member mounted for rotation, and a dynamic pressure bearing rotatably supporting the rotary member. The dynamic pressure bearing has a stationary portion and a disk integrally connected to the stationary portion. The disk has surface portions defining thrust dynamic pressure bearing portions for supporting the rotary member in an axial direction and a radial dynamic pressure bearing portion for supporting the rotary member in a radial direction. A gap is disposed between the dynamic pressure bearing and the rotary member for receiving oil. A space is provided in fluid communication with the gap. The space has a central portion slanted downwardly in the radial direction for preventing leakage of the oil and has a diameter increasing gradually from the central portion in the radial direction.
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