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Title:
ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2019/150618
Kind Code:
A1
Abstract:
This actuator (A) is provided with an aluminum alloy cylinder (1), a bottom part (2) which closes one end of the cylinder (1), a cylindrical inner rod (3) which is inserted into the cylinder (1) and which together with the cylinder (1) forms an annular space (S), a piston rod (4) which is cylindrical and closed at one end, and which slides on the outer periphery of the inner rod (3) to define an extension-side chamber (R1) in conjunction with the inner rod (3), and a piston (5) which is provided on the piston rod (4) and slides on the inner periphery of the cylinder (1), defining a pressure-side chamber (R2) between the cylinder (1) and the piston rod (4), wherein the bottom part (2) has a through hole (2d) which communicates with the annular space (S), and the cylinder (1) has a film (1a) on the inner periphery, formed by surface treatment using an electrolyte.

Inventors:
OGAWA Yoshiyuki (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 〒1056111, JP)
SATOU Kousuke (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 〒1056111, JP)
OONO Fumiaki (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 〒1056111, JP)
ARAI Ryohei (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 〒1056111, JP)
Application Number:
JP2018/030277
Publication Date:
August 08, 2019
Filing Date:
August 14, 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:
F15B15/14; C25D11/04; F16J10/00
Foreign References:
JP2004011855A2004-01-15
JPH11291017A1999-10-26
US4608912A1986-09-02
JPH0496603U1992-08-21
JP2002227807A2002-08-14
JP2014051721A2014-03-20
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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