发明名称 |
Check valve and braking system using the same |
摘要 |
In a check valve in which a valve part is disposed in a valve part accommodating recess movably relative to a piston part, among the valve part accommodating recess, an anti-valve seat side accommodation space formed between a surface of the valve part accommodating recess in an anti-valve seat side of the valve part and a wall surface of the valve part accommodating recess are communicated to exit side fluid passages. |
申请公布号 |
US9227614(B2) |
申请公布日期 |
2016.01.05 |
申请号 |
US201313754034 |
申请日期 |
2013.01.30 |
申请人 |
DENSO CORPORATION;ADVICS CO., LTD. |
发明人 |
Kajita Hidenobu;Omi Masaaki |
分类号 |
F16K15/02;B60T17/04;B60T13/14;B60T8/34;B60T8/48;F16K15/04;F16K27/02 |
主分类号 |
F16K15/02 |
代理机构 |
Harness, Dickey & Pierce, P.L.C. |
代理人 |
Harness, Dickey & Pierce, P.L.C. |
主权项 |
1. A check valve comprising:
a case member having an entrance-side fluid passage where fluid flows in, an exit-side fluid passage where fluid flows out, and a valve seat disposed in a downstream end of the entrance-side fluid passage; a pipeline disposed in a housing, the pipeline being separated into a downstream side pipeline of the check valve and an upstream side pipeline of the check valve by the case member; a valve member that opens and closes a passage between the entrance-side fluid passage and the exit-side fluid passages by touching and separating from the valve seat, and is energized in a valve opening direction by a pressure of the fluid from the entrance-side fluid passage; and a spring that energizes the valve member in a valve closing direction; wherein, the check valve opens when the energization force in the valve opening direction due to the pressure exceeds the energization force in the valve closing direction due to the spring; wherein, the valve member has a piston part that reciprocates, and a valve part that is disposed in the valve seat side and touches and separates to the valve seat; the case member has a piston accommodation cylinder part that accommodates the piston part reciprocatably; the piston part has a valve part accommodating recess that accommodates a part of the valve part; the valve part is disposed in the valve part accommodating recess movably relative to the piston part, and is urged against a wall surface of the valve part accommodating recess by a pressure of the fluid from the entrance-side fluid passage; among the valve part accommodating recess, an anti-valve seat side accommodation space formed between a surface in an anti-valve seat side of the valve part and a wall surface of the valve part accommodating recess communicates to the exit side fluid passage. a damper chamber is formed by the valve member and the case member in an anti-valve seat side of the valve member, the damper chamber generates damping force; the anti-valve seat side accommodation space communicates with the exit side fluid passage through a piston part communicating slot formed in the wall surface of the valve part accommodating recess; the valve part accommodating recess has a tapered surface, and the valve part is contactable to the tapered surface, the anti-valve seat side accommodation space is formed between the piston part and the valve part; and the piston accommodation cylinder part is formed coaxially with the entrance-side fluid passage, and only a single through hole extending in a radial direction is formed in the piston accommodation cylinder part. |
地址 |
Kariya JP |