Dynamic pressure bearing device

Details Dynamic pressure bearing device Dynamic pressure bearing device

2008-07-22

2008-07-22

Hannon, Thomas R (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

Reexamination Certificate

active

07401979

ABSTRACT:
In a wider flow path4asurrounded with a shaft3, a thrust plate6and an inner circumferential corner portion1cof a bearing sleeve1in a small clearance4between a lower side radial bearing section13and an upper surface thrust bearing section14, chamfering is performed at the inner circumferential corner portion1cof the bearing sleeve1, wherein a width of the wider flow path4ain the radial direction in rotation is formed so as to be wider than a width of a communication hole16located below the wider flow path4ain the radial direction in rotation to thereby render a flow of a lubricating fluid5flowing into the wider flow path4afrom the communication hole16smooth.

REFERENCES:
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patent: 5988886 (1999-11-01), Takahashi
patent: 6126320 (2000-10-01), Ichiyama
patent: 6176618 (2001-01-01), Kawawada et al.
patent: 6361216 (2002-03-01), Takahashi et al.
patent: 7101084 (2006-09-01), Gomyo
patent: 7220054 (2007-05-01), Gomyo
patent: 1331509 (2002-01-01), None
patent: 2002-34203 (2002-01-01), None
patent: 2003-028147 (2003-01-01), None
patent: 2003-28147 (2003-01-01), None
Chinese Office Action dated Aug. 24, 2007 of CN 200510116868.9.

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