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Patent Searching and Data


Title:
CYLINDER DEVICE AND VIBRATION DAMPING DEVICE FOR RAILWAY VEHICLE
Document Type and Number:
WIPO Patent Application WO/2019/044808
Kind Code:
A1
Abstract:
A cylinder device (C1) according to the present invention comprises: a cylinder (2); a rod (4) inserted into the cylinder (2); a piston (3) that is slidably inserted into the cylinder (2), is connected to the rod (4) and partitions the inside of the cylinder (2) into a rod-side chamber (5) and a piston-side chamber (6); a tank (8); a discharge passage (21) that causes the rod-side chamber (5) to communicate with the tank (8); a relief valve (22) provided in the discharge passage (21); and an attenuation unit (23) that causes a larger pressure loss than the relief valve (22) when the speed of the piston (3) relative to the cylinder (2) becomes equal to or higher than a predetermined speed.

Inventors:
NEGISHI Hisako (2-2 Yoyogi 2-chome, Shibuya-k, Tokyo 78, 〒1518578, JP)
OGAWA Takayuki (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 〒1056111, JP)
ISHII Daisuke (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 〒1056111, JP)
Application Number:
JP2018/031701
Publication Date:
March 07, 2019
Filing Date:
August 28, 2018
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)
International Classes:
F16F9/46; B61F5/24; B61F9/00; F15B21/04
Foreign References:
JP2014189216A2014-10-06
JP2016060438A2016-04-25
JP2008284885A2008-11-27
JP2011032849A2011-02-17
Attorney, Agent or Firm:
ISHIKAWA Ken et al. (Maruhiro Kyobashi Bldg. 9th Floor, 5-12 Kyobashi 1-chome, Chuo-k, Tokyo 31, 〒1040031, JP)
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