Patent ID: 9205822
Filing Date: 2015-12-08
Classification: B60T,F16K,G05D,Y10T

Abstract:
1. A pressure regulator configured to regulate a pressure of a working fluid supplied from a high-pressure source and to supply the working fluid whose pressure is regulated, comprising: a housing; a piston disposed in the housing so as to be movable in an axial direction of the housing; a high-pressure chamber that communicates with the high-pressure source; a low-pressure chamber that communicates with a low-pressure source; a regulated-pressure chamber in which a working fluid to be supplied from the pressure regulator is accommodated, the regulated-pressure chamber being configured such that a pressure of the accommodated working fluid acts on the piston, whereby the piston is biased in a first direction in the axial direction; a first pilot chamber defined by a part of the piston and the housing and configured such that a working fluid is introduced thereinto and such that a pressure of the introduced working fluid acts on the piston, whereby the piston is biased in a second direction opposite to the first direction; a second pilot chamber defined by another part of the piston and the housing and configured such that a working fluid is introduced thereinto and such that a pressure of the introduced working fluid acts on the piston, whereby the piston is biased in the second direction; and a valve mechanism configured such that, by a movement of the piston in the second direction, communication between the regulated-pressure chamber and the high-pressure chamber is permitted while communication between the regulated-pressure chamber and the low-pressure chamber is shut off and such that, by a movement of the piston in the first direction, the communication between the regulated-pressure chamber and the high-pressure chamber is shut off while the communication between the regulated-pressure chamber and the low-pressure chamber is permitted.