Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CLUTCH SEAL
Document Type and Number:
WIPO Patent Application WO/2014/073308
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a clutch seal capable of increasing the durability of a membrane section, which is a component of the seal and is obtained from a rubber-like elastic body. Additionally, the purpose is to provide a clutch seal capable of limiting the accumulation of working fluid on the concave surface of the membrane section. Said purposes are achieved by a clutch seal, which: is a ring-shaped seal interposed between a clutch plate and a piston for pressing the clutch plate in a dry clutch; has a middle ring that is fixed to the piston between an outer ring and an inner ring that are fixed to the clutch housing; and has membrane sections between the outer ring and the middle ring and between the inner ring and the middle ring, respectively, the membrane sections being obtained from rubber-like elastic bodies. The clutch seal is characterized in that, in the initial shape of the membrane sections, the middle ring is disposed at an intermediate position of the stroke thereof. The clutch seal is also characterized in that the straight portion of the outer membrane section has an angle of inclination oriented so that the radius decreases from a first foldback portion to a second foldback portion.

Inventors:
TSUKAMOTO Koji (590-1 Jitogata, Makinohara-sh, Shizuoka 32, 〒4210532, JP)
MIYAKE Kuniaki (1-12-15, Shiba-Daimon, Minato-k, Tokyo 87, 〒1058587, JP)
MUKAIDA Toshihiro (590-1 Jitogata, Makinohara-sh, Shizuoka 32, 〒4210532, JP)
OKABE Hitoshi (4-3-1 Tsujido-shinmachi, Fujisawa-sh, Kanagawa 42, 〒2510042, JP)
YOKOTA Atsushi (4-3-1 Tsujido-shinmachi, Fujisawa-sh, Kanagawa 42, 〒2510042, JP)
OSONE Tatsuya (2, Takara-cho, Kanagawa-ku, Yokohama-sh, Kanagawa 23, 〒2210023, JP)
AKASAKA Yuuzo (2, Takara-cho, Kanagawa-ku, Yokohama-sh, Kanagawa 23, 〒2210023, JP)
UEHARA Hiroki (2, Takara-cho, Kanagawa-ku, Yokohama-sh, Kanagawa 23, 〒2210023, JP)
FURUICHI Jun (2, Takara-cho, Kanagawa-ku, Yokohama-sh, Kanagawa 23, 〒2210023, JP)
Application Number:
JP2013/077280
Publication Date:
May 15, 2014
Filing Date:
October 08, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NOK CORPORATION (12-15, Shibadaimon 1-chome Minato-k, Tokyo 85, 〒1058585, JP)
NISSAN MOTOR CO., LTD. (2 Takara-cho, Kanagawa-ku Yokohama-sh, Kanagawa 23, 〒2210023, JP)
International Classes:
F16D25/12; F16D25/063; F16D25/08; F16J3/04; F16J15/52
Foreign References:
JP2012052562A2012-03-15
JPH08121609A1996-05-17
US20090236189A12009-09-24
EP0677686A11995-10-18
JP2009085274A2009-04-23
JP2011220507A2011-11-04
JPS6191534A1986-05-09
JP2012052562A2012-03-15
JP2010151312A2010-07-08
Other References:
See also references of EP 2918864A4
Attorney, Agent or Firm:
NOMOTO Yoichi et al. (NOMOTO INTERNATIONAL PATENT OFFICE, Terao Building 8-4, Nishi-Shinbashi 2-chome, Minato-k, Tokyo 03, 〒1050003, JP)
Download PDF: