Patent ID: 6766828
Filing Date: 2004-07-27
Classification: F15B,F15C,F16K,Y10T

Abstract:
An interlock valve comprising: a main valve portion having a plurality of valve ports, a valve hole with which the valve ports communicate, a main valve portion including a valve member housed to be displaced in the valve hole to select a flow path; a driving-side operating portion having a driving piston disposed on a side of a first end of the valve member to operate by an action of fluid pressure to switch the valve member and a driving pressure chamber for causing the fluid pressure to act on the driving piston; a return-side operating portion having a return spring disposed on a side of a second end of the valve member; and an OR circuit portion formed of a plurality of shuttle valves, a plurality of OR input ports, and one OR output port such that fluid pressure input to any one of the OR input ports is output from the OR output port to the driving pressure chamber,wherein the main valve portion is provided in a first casing, the OR circuit portion is provided in a second casing, the driving-side operating portion is provided in a first end plate, the return-side operating portion is provided in a second end plate, the first casing and the second casing arranged side by side are sandwiched between the first end plate and the second end plate disposed to face each other, and a flow path connecting the OR output port and the driving pressure chamber is provided in the first end plate.