Title:
FLUID PRESSURE CYLINDER
Document Type and Number:
WIPO Patent Application WO/2023/007890
Kind Code:
A1
Abstract:
A hydraulic cylinder (100) comprises: a cylinder tube (10); a piston rod (20); a piston member (30); an in-rod flow path (50) which is provided inside the piston rod (20), one opening (51) of which is open on the outer circumferential surface of the piston rod (20) in the cylinder tube (10), and an other opening (52) of which is open outside the cylinder tube (10); and a pressure sensor (60) which is provided outside the cylinder tube (10) and which detects that a working fluid has been guided to the in-rod flow path (50). The piston member (30) is connected to the piston rod (20) in a state where one end surface (33) thereof is in contact with an annular stepped part (23) provided to the outer circumferential surface of the piston rod (20) so as to block said one opening (51) of the in-rod flow path (50). The pressure sensor (60) detects that the working fluid has been guided from a fluid pressure chamber to the in-rod flow path (50), through a space between the stepped part (23) and the piston member (30).
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Inventors:
ITOU TATSUYA (JP)
KOBAYASHI NOBUYUKI (JP)
KOBAYASHI HIROTAKA (JP)
KOBAYASHI NOBUYUKI (JP)
KOBAYASHI HIROTAKA (JP)
Application Number:
PCT/JP2022/018718
Publication Date:
February 02, 2023
Filing Date:
April 25, 2022
Export Citation:
Assignee:
KYB YS CO LTD (JP)
International Classes:
F15B15/14
Foreign References:
| JP2007092785A | 2007-04-12 | |||
| JPS6397491A | 1988-04-28 | |||
| US20200362888A1 | 2020-11-19 | |||
| JP2010164067A | 2010-07-29 | |||
| JPS5861905U | 1983-04-26 | |||
| JP2004263713A | 2004-09-24 | |||
| JP2021123341A | 2021-08-30 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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