Title:
FLUID PRESSURE CYLINDER
Document Type and Number:
WIPO Patent Application WO/2017/170361
Kind Code:
A1
Abstract:
A hydraulic cylinder (100) is provided with: a cushion section (40) for reducing the speed of a piston rod (20) near the stroke end of the extension movement thereof; and a contact section 51 with which the cushion section (40) comes in contact near the stroke end of the extension movement. The cushion section (40) has: a cushion ring (41) for defining a cushion passage (42); and a restriction pin (45) for restricting the movement of the cushion ring (41) relative to the piston rod (20) while being accommodated within an annular groove (25) formed in the outer peripheral surface of the piston rod (20). When the cushion ring (41) and the contact section (51) come in contact with each other near the stroke end of the extension movement, the restriction pin (45) comes out of the annular groove (25) to permit the movement of the cushion ring (41) relative to the piston rod (20), and hydraulic oil in a rod-side chamber (1) is discharged from a supply and discharge passage (4) through a cushion passage (42).
Inventors:
TAKAI YASUHITO (JP)
Application Number:
PCT/JP2017/012323
Publication Date:
October 05, 2017
Filing Date:
March 27, 2017
Export Citation:
Assignee:
KYB CORP (JP)
International Classes:
F15B15/22
Foreign References:
| JPS60125404A | 1985-07-04 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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