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Patent Searching and Data


Title:
FLUID DYNAMIC PRESSURE BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/144288
Kind Code:
A1
Abstract:
In the present invention, both a shaft-side seal surface (2a2) provided to the outer peripheral surface of a shaft (2a) and a bearing-side seal surface (9a) provided to the inner peripheral surface of a bearing member (11) (seal unit (9)) are caused to be a tapered surface that contracts towards the side that is open to the atmosphere. Also, the minimum diameter (r4) of the bearing-side seal surface (9a) is caused to be greater than the maximum diameter (r5) of the shaft-side seal surface (2a2).

Inventors:
KURIMURA TETSUYA (JP)
SHIOZAWA KAZUYUKI (JP)
YAMAMOTO YASUHIRO (JP)
Application Number:
JP2012/057358
Publication Date:
October 26, 2012
Filing Date:
March 22, 2012
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
KURIMURA TETSUYA (JP)
SHIOZAWA KAZUYUKI (JP)
YAMAMOTO YASUHIRO (JP)
International Classes:
F16C17/10; F16C33/74
Foreign References:
JP2001082458A2001-03-27
JPH0647731U1994-06-28
JP2007170641A2007-07-05
JP2004225896A2004-08-12
JP2008111552A2008-05-15
JP2005337364A2005-12-08
JP2003083323A2003-03-19
JP2002168250A2002-06-14
Other References:
See also references of EP 2700832A4
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
Kunihiko Shiromura (JP)
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Claims: