Title:
Control valve
Document Type and Number:
Japanese Patent JP5906372
Kind Code:
B2
Abstract:
A control valve (101) according to an embodiment includes a guide member of a cylindrical shape (119) extending coaxially with a valve hole (114), a valve element of a bottomed cylindrical shape (118) for opening and closing a valve section such that the valve element touches and leaves the valve hole (114), and a pressure-canceling structure for canceling out at least part of pressure acting on the valve element (118) by introducing a working fluid into a back pressure chamber (154) via a leak passage (122), the pressure-canceling structure including the back pressure chamber (154), surrounded by the valve element (118) and the guide member (119), and the leak passage (122) communicating between the valve hole (114) and the back pressure chamber (154). A sliding portion (170) and a spacing (172) are formed in an overlapped portion which is a region overlapped by the valve element (118) and the guide member (119). The sliding portion (170) is connected circumferentially at least when the valve section is closed, and the proportion of the spacing (172) occupied in the overlapped portion is larger than the proportion of the sliding portion (170) occupied at the time when the valve section is open.
Inventors:
Michio Matsumoto
Isao Sendo
Masaaki Tonegawa
Isao Sendo
Masaaki Tonegawa
Application Number:
JP2012120151A
Publication Date:
April 20, 2016
Filing Date:
May 25, 2012
Export Citation:
Assignee:
TAGC Inc.
International Classes:
F16K1/36; F16K1/00; F25B41/06
Domestic Patent References:
| JP7208631A | ||||
| JP2009525424A | ||||
| JP63140186A | ||||
| JP2006153099A |
Foreign References:
| US3428090 |
Attorney, Agent or Firm:
Patent corporation Interbrain
Takuya Matsuo
Takuya Matsuo