Patent ID: 7758013
Filing Date: 2010-07-20
Classification: F16K,F25B

Abstract:
1. A motor-operated valve comprising: a valve main body that has a valve chamber and a valve seat formed in the valve chamber; a valve body that comes into contact with and moves away from the valve seat to adjust a passing flow rate of a fluid; a driving unit that has a rotor and a stator that drives to rotate the rotor; a feed screw mechanism that converts the rotation of the rotor into actions of the valve body coming into contact with and moving away from the valve seat; a spring that urges the valve body in a direction away from the valve seat to remove backlash intrinsic in the feed screw mechanism, and a means for absorbing a tilt of a coil spring by an alignment action realized by sliding of curved surfaces of a spring bearing ring and the valve body without forming a gap, wherein the spring is arranged in the valve chamber.