Title:
BUFFER
Document Type and Number:
Japanese Patent JP2021050794
Kind Code:
A
Abstract:
To provide a buffer capable of simplifying its structure.SOLUTION: A fixed piston 33 has a base member 131 fixed to a cylinder 12 and having a through hole 145 penetrating along an axial direction, and a pin member 132 inserted into the through hole 145 so that it can move in different directions according to an extension stroke and a contraction stroke of the piston. The pin member 132 has a piston side flange 192, a free piston side flange 214, a sliding part 231 formed on an outer peripheral side between them and sliding in the through hole 145, and a first communication path 241 and a second communication path 242 provided on the inner peripheral side of the sliding part 231 and capable of penetrating the base member 131 in the axial direction. Due to the movement of the pin member 132, working liquid circulates in both the first communication path 241 and the second communication path 242 in the extension stroke, and the working liquid circulates only in the first communication path 241 in the contraction stroke.SELECTED DRAWING: Figure 3
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Inventors:
YOKOTA TAKESHI
Application Number:
JP2019175411A
Publication Date:
April 01, 2021
Filing Date:
September 26, 2019
Export Citation:
Assignee:
HITACHI ASTEMO LTD
International Classes:
F16F9/34; F16F9/32
Domestic Patent References:
| JP2013133924A | 2013-07-08 | |||
| JP2013507589A | 2013-03-04 | |||
| JP2016528458A | 2016-09-15 | |||
| JP2010164191A | 2010-07-29 | |||
| JP2010101351A | 2010-05-06 | |||
| JPH08189540A | 1996-07-23 | |||
| JPH08121524A | 1996-05-14 | |||
| JP2007198548A | 2007-08-09 |
Attorney, Agent or Firm:
Shiga International Patent Office