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Patent Searching and Data


Title:
SEALING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/255591
Kind Code:
A1
Abstract:
Provided is a sealing device wherein slide abrasion of the main lip is reduced. This sealing device is characterized in that an inner circumferential surface of an auxiliary lip 221 has a slanted surface the diameter of which increases from the lip distal end toward the opposite side (A) from the sealed-fluid side (O), a plurality of protrusions 222, which are provided so as to be able to slide with respect to a shaft 700 and on both sides of which are formed gaps enabling communication between a region on the sealed-fluid side (O) and the region (A) on the opposite side, are provided with intervals therebetween in the circumferential direction on the slanted surface, and a sliding surface of the plurality of protrusions 222 is designed so as to be parallel to the slanted surface when viewed in a cross section cut along a plane containing the center axis line of the sealing device 10 and no external force is acting on the auxiliary lip 221.

Inventors:
ABE JUNICHI (JP)
ITO SAKI (JP)
Application Number:
PCT/JP2020/019133
Publication Date:
December 24, 2020
Filing Date:
May 13, 2020
Export Citation:
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Assignee:
NOK CORP (JP)
International Classes:
F16J15/3232
Foreign References:
EP1239197A12002-09-11
JP2017026072A2017-02-02
JPH11173239A1999-06-29
JP2017026072A2017-02-02
JP2009052705A2009-03-12
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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