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Title:
OIL SEAL FOR RECIPROCATION MOTION
Document Type and Number:
WIPO Patent Application WO/2008/029786
Kind Code:
A1
Abstract:
[PROBLEMS] A high performance oil seal for reciprocating motion, preventing the inner peripheral surface of a backup ring from being in contact at its entire surface with a reciprocating shaft. [MEANS FOR SOLVING PROBLEMS] The oil seal (1) has a seal body (6) provided with a seal lip (7) capable of being in sliding contact with the reciprocating shaft (8), the resin backup ring (4) placed so as to support the seal lip (7) from the atmosphere side in order to secure durability of the seal lip (7) and having at least one annular groove (21) that can hold a lubrication member and that is formed in that inner peripheral surface of the backup ring which faces the reciprocating shaft (8), and a holding member (22) for holding the backup ring (4) between the holding member (8) and a seal body (6) in a sandwiched manner. The inner peripheral surface (20) of the backup ring (4) is formed in a tapered shape expanding in diameter from the sealed side (OS) toward the atmosphere side (AS).

Inventors:
HORIBA, Chiyo (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 1056111, JP)
堀場 千誉 (〒11 東京都港区浜松町2丁目4番1号 世界貿易センタービル カヤバ工業株式会社内 Tokyo, 1056111, JP)
YONEZAWA, Kazuhiko (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 1056111, JP)
米澤 和彦 (〒11 東京都港区浜松町2丁目4番1号 世界貿易センタービル カヤバ工業株式会社内 Tokyo, 1056111, JP)
Application Number:
JP2007/067177
Publication Date:
March 13, 2008
Filing Date:
September 04, 2007
Export Citation:
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Assignee:
KYB CORPORATION (World Trade Center Bldg, 4-1 Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 1056111, JP)
カヤバ工業株式会社 (〒11 東京都港区浜松町2丁目4番1号 世界貿易センタービル Tokyo, 1056111, JP)
ARAI SEISAKUSHO CO., LTD. (30-1, Horikiri 3-chome Katsushika-k, Tokyo 66, 1248566, JP)
株式会社荒井製作所 (〒66 東京都葛飾区堀切3丁目30番1号 Tokyo, 1248566, JP)
HORIBA, Chiyo (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 1056111, JP)
堀場 千誉 (〒11 東京都港区浜松町2丁目4番1号 世界貿易センタービル カヤバ工業株式会社内 Tokyo, 1056111, JP)
International Classes:
F16J15/32
Attorney, Agent or Firm:
NAKAO, Shunsuke et al. (3-5 Uchikanda 1-chome, Chiyoda-k, Tokyo 47, 1010047, JP)
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