Title:
緩衝弁
Document Type and Number:
Japanese Patent JP5848721
Kind Code:
B2
Abstract:
A cushion valve (1) includes a housing (2) having a pair of primary chambers (25A and 25B) and a pair of secondary chambers (26A and 26B). A first spool (3) and a pair of second spools (4A and 4B) are arranged in the housing (2). Biasing members (6) are respectively arranged between the first spool (3) and the second spool (4A) and between the first spool (3) and the second spool (4B). A first internal passage (35) communicating with a tank port (23) is formed at the first spool (3). Each of the second spools includes a land portion (43) configured to open or close an opening (27A or 27B) formed between the primary chamber and the corresponding secondary chamber. A second internal passage (45) including a restrictor (46) is formed at each of the second spools. When one of the second spools moves toward the first spool (3), the first internal passage (35) communicates with the secondary chamber located at the other second spool side.
Inventors:
Masahiro Matsuo
Ryo Kawakami
Ryo Kawakami
Application Number:
JP2013058256A
Publication Date:
January 27, 2016
Filing Date:
March 21, 2013
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
F16K47/04; F16K3/26; F16K11/10
Domestic Patent References:
| JP6001802U | ||||
| JP9072305A | ||||
| JP8312801A | ||||
| JP2001165104A | ||||
| JP62044305U | ||||
| JP62044105U |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office