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Title:
FLUID DAMPER
Document Type and Number:
WIPO Patent Application WO/2007/091399
Kind Code:
A1
Abstract:
A fluid damper which is capable of operating while automatically changing the damping force according to the movement of a piston without installing a sensor detecting the displacement of the piston and a controller controlling the supply of electric power. The fluid damper, in which the damping force is automatically changed according to the movement of the piston, comprises a fluid (8) having magnetism, a piston (2) of magnetic material, a cylinder (3) sealing the fluid (8) with magnetism and storing the piston (2), a piston rod (4) passed through the cylinder (3) and supporting the piston (2), magnetic field generating device (6) installed on the outside of the cylinder (3), first yoke member (5) disposed around the cylinder (3), and second yoke member (7) disposed around the piston rod (4) and on the outside of the cylinder (3). Thereby, a magnetic circuit can be partially formed.

Inventors:
MURAKAMI, Takahiro (1646 Abiko, Abiko-sh, Chiba 94, 2701194, JP)
村上貴裕 (〒94 千葉県我孫子市我孫子1646番地 財団法人電力中央研究所 地球工学研究所内 Chiba, 2701194, JP)
Application Number:
JP2007/000078
Publication Date:
August 16, 2007
Filing Date:
February 09, 2007
Export Citation:
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Assignee:
CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY (6-1 Otemachi 1-chome, Chiyoda-ku Tokyo, 26, 1008126, JP)
財団法人電力中央研究所 (〒26 東京都千代田区大手町1丁目6番1号 Tokyo, 1008126, JP)
MURAKAMI, Takahiro (1646 Abiko, Abiko-sh, Chiba 94, 2701194, JP)
International Classes:
F16F9/53; F16F9/20
Foreign References:
JPH07190128A1995-07-28
JPH08109941A1996-04-30
JP2005291338A2005-10-20
JP2003314608A2003-11-06
JP2005291284A2005-10-20
JP2002127727A2002-05-08
JP2004316797A2004-11-11
Other References:
S. RAKHEJA: 'Vibration and Shock Isolation Performance of a Semi-Active' ON-OFF' DAMPER, AMERICAN SOCIETY OF MECHANICAL ENGINEERS, JOURNAL OF VIBRATION, ACOUSTICS, STRESS, AND RELIABILITY IN DESIGN vol. 107, 1985, pages 398 - 403
See also references of EP 1983214A1
Attorney, Agent or Firm:
MURASE, Kazumi (KOHNO TORANOMON BUILDING 2F, 8-5 Toranomon 1-chom, Minato-ku Tokyo 01, 1050001, JP)
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