Patent ID: 9163743
Filing Date: 2015-10-20
Classification: F16K,G05D,Y10T

Abstract:
1. A piezoelectrically driven valve comprising: (a) a valve element disposed to open and close a fluid passage; (b) a piezoelectric actuator disposed to drive the valve element for opening/closing the fluid passage by utilizing extension of a piezoelectric element of the piezoelectric actuator; (c) a radiation spacer that lifts and supports the piezoelectric actuator away from the fluid passage, and the radiation spacer radiates heat that is transferred from fluid flowing in the fluid passage to the piezoelectric actuator; (d) a support cylinder that houses and supports both of the piezoelectric actuator and the radiation spacer, wherein the support cylinder is made of a material with the same thermal expansion coefficient as that of the radiation spacer; wherein the valve element comprises: