Title:
SEALING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/111303
Kind Code:
A1
Abstract:
The objective of the present invention is to suppress the occurrence of static leakage in a sealing device provided with a combination of a seal lip and a seal flange which are slidably in contact with each other, and a screw groove arranged in the end face, in the axial direction, of the seal flange. In order to accomplish the objective, this sealing device which employs a structure in which the seal lip attached to a non-rotational housing side is slidably in contact with the end face, in the axial direction, of the seal flange on the rotational axis side, and which has a screw groove arranged in the end face, in the axial direction, of the seal flange so as to exert a fluid pumping action during rotation, is characterized in that the screw groove has an inner-circumferential-side inclined surface and an outer-circumferential-side inclined surface as the internal surfaces, and has a groove bottom part in a circular arc cross-sectional shape that interconnects both of the inclined surfaces.
Inventors:
YAMAGUCHI YOSHIHISA (JP)
HYAKUTAKE HIDEHARU (JP)
SAKANO YUYA (JP)
HYAKUTAKE HIDEHARU (JP)
SAKANO YUYA (JP)
Application Number:
PCT/JP2016/050186
Publication Date:
July 14, 2016
Filing Date:
January 06, 2016
Export Citation:
Assignee:
NOK CORP (JP)
International Classes:
F16J15/3204
Foreign References:
| JPH02113173A | 1990-04-25 | |||
| JPH0357563U | 1991-06-03 |
Other References:
See also references of EP 3244100A4
Attorney, Agent or Firm:
NOMOTO Yoichi et al. (JP)
Yoichi Nomoto (JP)
Yoichi Nomoto (JP)
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