Patent ID: 6774753
Filing Date: 2004-08-10
Classification: B60T,F16K

Abstract:
A normally closed electromagnetic valve comprising:a cylindrical valve housing having a thin wall; a valve seat member fitted in and fixed to one end of the valve housing; a fixed core fixed liquid-tightly to the other end of the valve housing; a movable core forming a valve chamber with the valve seat member and housed in the valve housing so as to be opposed to the fixed core; a valve body fixed to the movable core seatably on a valve seat formed on the valve seat member facing the valve chamber; a return spring provided between the fixed core and the movable core and giving a spring force that causes the valve body to be seated on the valve seat; and, a coil for generating an electromagnetic force that causes the movable core to be attracted to the fixed core during excitation, wherein a large diameter portion is provided in the axially middle portion of the valve housing.