Patent ID: 9416893
Filing Date: 2016-08-16
CPC Classification: F15B,F16K,Y10T

Claim Text:
1. A fluid controller actuator, comprising: a casing which is attached above a body; a biasing member which is configured by a plurality of disc-shaped diaphragm springs having a through hole at the central portion thereof, and biases a valve rod downwardly by a lower side peripheral edge portion of the through hole; an inner side spring presser which presses an upper side peripheral edge portion of the through hole of the biasing member downwardly; an outer side spring presser which presses an outer peripheral edge portion of the biasing member downwardly; and an operation air introduction chamber which presses the outer side spring presser downwardly as operation air is introduced, wherein, in a state where the operation air is not introduced into the operation air introduction chamber, the biasing member is elastically deformed so that a protrusion amount with respect to a shape of protrusion which is downward in a natural state is small, and biases the valve rod downwardly and the outer side spring presser upwardly, respectively, and, as the operation air is introduced into the operation air introduction chamber, the outer side spring presser is pressed downwardly, and the biasing member is deformed upwardly in a shape of protrusion, and wherein the inner side spring presser has a shaft portion and a cylinder portion which is provided on a lower end portion of the shaft portion, and presses the upper side peripheral edge portion of the through hole of the biasing member by a lower end of the cylinder portion, the shaft portion penetrates the outer side spring presser and extends upwardly, and an adjustment screw which positions the inner side spring presser as the lower end abuts against an upper surface of the shaft portion of the inner side spring presser, is screwed to a top wall of the casing.