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Patent Searching and Data


Title:
RING-SHAPED DUST SEAL
Document Type and Number:
WIPO Patent Application WO/2019/182034
Kind Code:
A1
Abstract:
Provided is a ring-shaped dust seal for which, while an outstanding dust seal function being realized, local wear, flattening (deformation), and stick slip (noise, vibration) have been improved. The ring-shaped dust seal is made of an elastic material, is supported by a housing, includes a circular ring-shaped dust lip (4), and has the surface of the dust lip (4) make contact with the outer peripheral surface of a reciprocal movement shaft that is disposed within the housing with the tip side thereof protruding toward the atmosphere side, wherein, in a vertical cross-section of the dust lip (4), the average radius of curvature of a surface (4b) that is more convex on the inner side of the housing from a peak section of the dust lip (4) is greater than the average radius of curvature of a surface (4a) that is more convex on the atmosphere side from the peak section of the dust lip (4).

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Inventors:
TOKUNAGA Wataru (187-11 Usuba, Hanakawa-cho, Kitaibaraki-sh, Ibaraki 35, 〒3191535, JP)
Application Number:
JP2019/011797
Publication Date:
September 26, 2019
Filing Date:
March 20, 2019
Export Citation:
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Assignee:
NOK CORPORATION (12-15, Shibadaimon 1-chome Minato-k, Tokyo 85, 〒1058585, JP)
International Classes:
F16J15/3204; F16F9/36; F16J15/18; F15B15/14
Foreign References:
JP2006029518A2006-02-02
JP2009121534A2009-06-04
JP2005221019A2005-08-18
JP2008169958A2008-07-24
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (Sonderhoff & Einsel Law and Patent Office, Shin-Marunouchi Center Building 6-2, Marunouchi 1-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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