Patent ID: 7014163
Filing Date: 2006-03-21
Classification: F16K

Abstract:
1. In a pilot-controlled electromagnetic valve comprising: a piston chamber; a main valve chamber formed at one side of the piston chamber; a manual controller chamber formed at the other side of the piston chamber with a partition interposed therebetween; a piston slidably provided in the piston chamber; and a main valve element slidably provided in the main valve chamber; wherein the main valve element is moved by movement of the piston; the improvement which comprises: a guide hole formed in said partition; a guide projection formed on the other side of said piston, said guide projection being inserted through said guide hole to project into said manual controller chamber; and a manual controller reciprocatably provided in said manual controller chamber, said manual controller having a sloped surface; wherein actuation of said manual controller causes said sloped surface to contact said guide projection, thereby moving said piston.