Patent ID: 6131879
Filing Date: 2000-10-17
Classification: F15C,F16K,Y10T

Abstract:
A microvalve comprising:a base element provided with a passage opening;a tappet;a suspension device by means of which the tappet can be guided relative to the base element in such a way that the passage opening can be closed or opened by said tappet; anda piezoelectric actuator for actuating the tappet, the longitudinal dimensions of said piezoelectric actuator being adapted to be changed by the application of an electric voltage;wherein longitudinally spaced ends of the piezoelectric actuator are connected to longitudinally spaced ends of the suspension device in such a way that the suspension device constitutes a means for providing a mechanical translation between the actuator and the tappet,wherein a change in the longitudinal dimensions of the piezoelectric actuator caused by the application of an electric voltage to said piezoelectric actuator is mechanically translated by said suspension device into a movement of the tappet essentially at right angles to said longitudinal direction whereby the passage opening will be opened or closed, andwherein the suspension device is secured, at at least two spaced points thereof, to the base element with the aid of hingelike means.