Patent ID: 9423044
Filing Date: 2016-08-23
CPC Classification: F16K,H01L,Y10T

Claim Text:
1. A piezoelectric valve openable by voltage, the piezoelectric valve comprising: a valve body including: at least one port through which a fluid flows, an internal space communicating with the port, and at least one valve seat through which the fluid flowing through the port flows; a valve unit opening or closing the valve seat of the valve body; a plate-shaped piezoelectric element horizontally installed in the internal space of the valve body, with the valve unit mounted to a first end of the piezoelectric element; an insulation stick integrated with a second end of the piezoelectric element, and protecting the second end of the piezoelectric element in an insulating state; an adjustment bolt rotatably held in the valve body, with the insulation stick fitted over the adjustment bolt; an elastic body elastically supporting the insulation stick fitted over the adjustment bolt in such a way that the insulation stick is moved along a length of the adjustment bolt; an adjustment nut engaged with the adjustment bolt at a location opposite to the elastic body, the adjustment nut compressing the insulation stick while being moved along the length of the adjustment bolt by a pivot rotation of the adjustment bolt, thereby moving both the insulation stick and the second end of the piezoelectric element along the length of the adjustment bolt; and an adjuster holding the adjustment nut in the valve body in such a way that the adjustment nut is movable while being prevented from rotating, the adjuster moving the adjustment nut in response to the pivot rotation of the adjustment bolt and controlling a compression force acting on the insulation stick by the adjustment nut, wherein the adjuster comprises: a nut holder formed in the valve body and having a cap-shaped structure, with a close contact surface formed on an inner circumferential surface of the nut holder and coming into close contact with an outer circumferential surface of the adjustment nut, thereby preventing the adjustment nut from rotating, and with a space defined in the nut holder and having a depth greater than a height of the adjustment nut, thereby forming a moving space for allowing a movement of the adjustment nut.