Title:
ROLLING BEARING, BEARING UNIT FOR AIR TURBINE, AND AIR TURBINE HANDPIECE FOR DENTAL USE
Document Type and Number:
WIPO Patent Application WO/2017/154935
Kind Code:
A1
Abstract:
An axial end of the outer peripheral surface of the inner ring of a rolling bearing of a bearing unit for an air turbine has a sloped surface, the diameter of which changes from large to small toward the downstream side in the direction in which compressed air is supplied. A seal member does not have a metallic core, consists only of an elastic material, and has a base which extends radially and an elastically deformable lip section which extends from the radially inner end of the base and which is sloped to the downstream side in the direction in which the compressed air is supplied. When the compressed air does not act, the sloped surface of the lip section, which is located on the upstream side in the direction in which the compressed air is supplied, is in contact with the sloped surface of the inner ring. When the compressed air acts, the area of contact between the sloped surface of the lip section, which is located on the upstream side in the direction in which the compressed air is supplied, and the sloped surface of the inner ring is smaller than in the case in which the compressed air does not act.
Inventors:
NAKAHARA TORU (JP)
YAMAMOTO ATSUHIRO (JP)
MIYAZAKI SHOSHI (JP)
YAMAMOTO ATSUHIRO (JP)
MIYAZAKI SHOSHI (JP)
Application Number:
PCT/JP2017/009102
Publication Date:
September 14, 2017
Filing Date:
March 07, 2017
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C33/78; A61C1/10; F16C19/06; F16J15/3204
Foreign References:
| JP2011117548A | 2011-06-16 | |||
| JP2013253689A | 2013-12-19 | |||
| JP2003135486A | 2003-05-13 |
Other References:
See also references of EP 3428468A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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