Search International and National Patent Collections

WIPO logo
1. (WO2019004087) METHOD FOR DETECTING SEALED STATE OF CYLINDER DEVICE, AND DEVICE FOR DETECTING SEALED STATE

Pub. No.:    WO/2019/004087    International Application No.:    PCT/JP2018/023843
Publication Date: Fri Jan 04 00:59:59 CET 2019 International Filing Date: Sat Jun 23 01:59:59 CEST 2018
IPC: G01M 3/26
F16F 9/36
F16J 15/00
G01M 3/20
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: HASHIMOTO Takahiro
橋本 敬宏
OKAMURA Masayuki
岡村 昌幸
Title: METHOD FOR DETECTING SEALED STATE OF CYLINDER DEVICE, AND DEVICE FOR DETECTING SEALED STATE
Abstract:
This method for detecting a sealed state includes an accommodation step in which the entirety of a cylinder device (10) having a seal member (26) between a cylinder (11) and a piston rod (22) is accommodated within a chamber (132) that can be air-tightly sealed, a pressure reduction step in which the pressure within the chamber (132) is reduced to be below atmospheric pressure by a prescribed pressure so that the chamber (132) reaches a reduced-pressure state, a pressure measurement step in which the pressure within the chamber (132) is measured, and an abnormality detection step in which an abnormality in the sealing state of the seal member (26) of the cylinder device (10) is detected on the basis of the pressure within the chamber (132).