Patent ID: 8960217
Filing Date: 2015-02-24
Classification: F15B,F16K,Y10T

Abstract:
1. A pilot relay comprising: an input air pressure chamber, a first supply air pressure chamber, a second supply air pressure chamber, a first output air pressure chamber, a second output air pressure chamber, a first discharge air chamber, a second discharge air chamber, and a bias chamber formed within a housing; a diaphragm configured to be dislocated by input air pressure directed into the input air pressure chamber; a moveable body having a first opening located in the first output air pressure chamber, a second opening located in the second output air pressure chamber, a first discharge air duct connecting the first opening to the first discharge air chamber, and a second discharge air duct connecting the second opening to the second discharge air chamber, the movable body being supported by the diaphragm to move within the housing; a first poppet valve provided to move through a first connecting hole formed in a first dividing wall dividing the first supply air pressure chamber and the first output air pressure chamber, the first poppet valve having, integrally, a first discharge air valve opening and closing a first opening of the moveable body and a first supply air valve opening and closing the first connecting hole; a second poppet valve provided to move through a second connecting hole formed in a second dividing wall that divides the second supply air pressure chamber and the second output air pressure chamber, the second poppet valve having, integrally, a second discharge air valve opening and closing a second opening of the moveable body and a second supply air valve opening and closing the second connecting hole; a first spring member biasing the first poppet valve in the direction wherein the first supply air valve closes the first connecting hole; and a second spring member biasing the second poppet valve in the direction wherein the second supply air valve closes the second connecting hole, wherein: the input air pressure chamber is provided next to neither the first output air pressure chamber nor the second output air pressure chamber; the first discharge air chamber is adjacent to the first output air pressure chamber with a first diaphragm interposed therebetween, and adjacent to the bias chamber with a second diaphragm interposed therebetween; the input air pressure chamber is adjacent to the bias chamber with a third diaphragm interposed therebetween, and adjacent to the second discharge air chamber with a fourth diaphragm interposed therebetween; and the second discharge air chamber is adjacent to the second output air pressure chamber with a fifth diaphragm interposed therebetween.