Patent ID: 6715509
Filing Date: 2004-04-06
Classification: F15B,F16K,Y10T

Abstract:
An electromagnetic valve for an operation member, comprising:a fixed core; a housing having an inlet port for introducing a fluid, an outlet port for supplying the fluid into the operation member, and a drain port for draining the fluid; a movable core disposed in the housing opposite to the fixed core to be reciprocated in the housing; a movable member disposed to be reciprocated together with the movable core, the movable member including a valve body for switching a communication between the inlet port and the outlet port and a communication between the outlet port and the drain port, and a shaft connected to the movable core and the valve body; and a coil for generating a magnetic attraction force for moving the movable core toward the fixed core, wherein: the shaft is disposed to extend in an axial line, and has a radial dimension smaller than that of the valve body; the inlet port and the outlet port are provided in the housing in such a manner that the fluid flows into the housing from the inlet port in a direction along the axial line and flows out from the outlet port in a direction substantially perpendicular to the axial line; the fixed core and the movable core are disposed to have a maximum distance therebetween, the maximum distance being larger than a movable stroke of the movable member; the movable core has a movable stroke that is controlled by the movable stroke of the movable member; the valve body and the shaft are connected and define an integrated and solid body; the housing has a first seat portion and a second seat portion opposite to the first seat portion; and the valve body has a top surface for contacting the first seat portion, and a bottom surface for contacting the second seat portion, wherein: the housing has an inner wall defining a receiving hole for receiving the shaft; the shaft has a slidable portion slidable on the inner wall of the housing, and a small radial portion connected to the slidable portion and the valve body; and the small radial portion has a radial dimension that is smaller than that of the slidable portion.