Patent ID: 6267146
Filing Date: 2001-07-31
Classification: F16K,Y10T

Abstract:
A piezoelectric valve (200) comprising:a plurality of diaphragms (222, 224) which are disposed diaphragm chambers (214a, 214b) whereto a fluid is supplied from an input port (250), for constituting a valve body;piezoelectric elements (226a to 226d) which are provided on said diaphragms (222, 224), respectively, and displace the diaphragms (222, 224); andvalve seats (236, 238) which are provided for a plurality of output ports (244, 246) opening in a housing (202) forming said diaphragm chambers (214a, 214b), and wherewith said diaphragms (222, 224) can be contacted, respectively, wherein:when no drive power is applied to said piezoelectric elements (226a to 226d), said diaphragms (222, 224) are contacted with said valve seats (236, 238) with no elastic energy being built up in said diaphragms (222, 224) for closing up said output ports (244, 246), and by selectively or simultaneously displacing said plurality of diaphragms (222, 224), said fluid being selectively or simultaneously introduced to said plurality of output ports (244, 246).