Patent ID: 8936230
Filing Date: 2015-01-20
Classification: B60T,F16K,H01F

Abstract:
1. A normally open electromagnetic valve comprising: a fixed core; a movable core which is disposed so as to be able to advance toward and retreat away from the fixed core and is driven when excited; a valve seat member provided in the fixed core and having a funnel-shaped valve seat surface; a valve member which is disposed so that the valve member advances or retreats together with the movable core with one end of the valve member kept in contact with the movable core, and that the other end of the valve member closes or opens a flow passage by coming into contact with or separates from the valve seat surface; and a return spring which urges the valve member away from the valve seat surface, wherein the fixed core has a cylindrical holding hole with a constant diameter; wherein the valve member advances or retreats being guided by the cylindrical holding hole in sliding contact with the cylindrical holding hole; wherein the movable core has a projection which projects toward the fixed core and which is directly inserted into the cylindrical holding hole; and wherein the projection of the movable core is configured to press a top surface of the valve member.