公开(公告)号：US20200217333A1

公开(公告)日：2020-07-09

申请号：US16649034

申请日：2018-08-14

Applicant: KYB CORPORATION

Inventor： Yoshiyuki OGAWA ,  Kousuke SATOU ,  Fumiaki OONO ,  Ryohei ARAI

IPC: F15B15/14 ,  C25D11/04

Abstract: An actuator includes a cylinder made of an aluminum alloy, a bottom part that closes one end of the cylinder, a cylindrical inner rod that is inserted in the cylinder to form an annular gap to the cylinder, a cylindrical piston rod that is closed at one end, slidably contacts with an outer periphery of the inner rod, and defines, together with the inner rod, an extension-side chamber, and a piston that is provided on the piston rod, slidably contacts with an inner periphery of the cylinder, and defines a compression-side chamber between the cylinder and the piston rod, in which the bottom part has a communication hole leading to the annular gap, and the cylinder has coating formed on the inner periphery by surface treatment using an electrolytic solution.

公开(公告)号：US20200217389A1

公开(公告)日：2020-07-09

申请号：US16649001

申请日：2018-08-14

Applicant: KYB CORPORATION

Inventor： Yoshiyuki OGAWA ,  Kousuke SATOU ,  Fumiaki OONO ,  Ryohei ARAI

IPC: F16F9/32 ,  F15B15/14

Abstract: A hydraulic device of the present invention includes an outer tube, a bottom portion that closes one end of the outer tube, an inner tube inserted into the outer tube, a movable portion movable relatively to the outer tube and the inner tube in an axial direction, coupling members attached to the outer periphery of the inner tube, and fixing tools that are in contact with the coupling members and fix the inner tube to the bottom portion.