Title:
車両制動装置
Document Type and Number:
Japanese Patent JP4779232
Kind Code:
B2
Abstract:
A pressure-responsive type pressure holding valve is proposed which serves to hold the hydraulic pressure in a circuit connected to a spool valve. A piston valve biased by a spring is mounted in a housing formed with a valve chamber, a small-diameter bore and a large-diameter bore. The outer periphery of the small-diameter portion of the piston valve is sealed by a seal member. A first port opened and closed by a valve head at the tip of the piston valve is connected to a circuit that needs pressure holding, a second port to a circuit in which minute leak can occur, and a third port to a source of hydraulic pressure for opening the valve.
Inventors:
Keita Nakano
Application Number:
JP2001157303A
Publication Date:
September 28, 2011
Filing Date:
May 25, 2001
Export Citation:
Assignee:
Advics Co., Ltd.
International Classes:
B60T13/14; B60T15/36; F16K17/04
Domestic Patent References:
| JP8026096A | ||||
| JP8034343A | ||||
| JP61135850A |
Foreign References:
| US3512550 |
Attorney, Agent or Firm:
Bunji Kamada
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro