Title:
OIL SEAL
Document Type and Number:
WIPO Patent Application WO/2007/122920
Kind Code:
A1
Abstract:
An oil seal (1) having a lip (4) over which a shaft (11) is inserted has a curling
prevention structure on the lip (4) side. The structure effectively works when
the shaft is rotated at the time of the insertion. A structure (6) for guiding
expansion of the lip is provided at that portion of the lip (4) which is in contact
with the shaft (11) when it is inserted, and the structure prevents curling of
the lip (4) when the shaft (11) is inserted while being rotated. A screw (8) or
a spiral groove is suitable as the guidance structure (6). Rotational motion
of the shaft (11) being inserted causes the shape of the screw (8) or the spiral
groove provided at the tip of the lip (4) to produce force in the lip (4), which force
acts in the direction of causing the lip (4) to expand in diameter.
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Inventors:
MUNEKATA SHINOBU (JP)
Application Number:
PCT/JP2007/055176
Publication Date:
November 01, 2007
Filing Date:
March 15, 2007
Export Citation:
Assignee:
NOK CORP (JP)
MUNEKATA SHINOBU (JP)
MUNEKATA SHINOBU (JP)
International Classes:
F16F9/36; F16J15/3268
Foreign References:
| JPH0218970U | 1990-02-08 | |||
| JPH01102570U | 1989-07-11 | |||
| JPH11351406A | 1999-12-24 | |||
| JPS59125653U | 1984-08-24 | |||
| JP2006170390A | 2006-06-29 |
Attorney, Agent or Firm:
NOMOTO, Yoichi (Terao Building8-4, Nishi-Shinbashi 2-chome,Minato-k, Tokyo 03, JP)
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