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Title:
PIEZOELECTRIC VALVE AND METHOD FOR MANUFACTURING SAID PIEZOELECTRIC VALVE
Document Type and Number:
WIPO Patent Application WO/2020/217610
Kind Code:
A1
Abstract:
Provided is a piezoelectric valve with which the following can be prevented: a broken piece of a layered piezoelectric element is ejected together with a compressed gas during use; the lifespan is shortened due to the infiltration of moisture into the layered piezoelectric element when used in a high-humidity environment; and stroke size is decreased or accurate operation is hindered due to obstruction of the movement of the layered piezoelectric element. A piezoelectric valve in which displacement of a layered piezoelectric element is utilized to open/close a valve, the piezoelectric valve comprising: a valve body having a gas pressure chamber that receives a compressed gas supplied from the outside; and an actuator that is disposed in the valve body, and that has a valve element, a layered piezoelectric element that generates as displacement a driving force necessary for operating the valve element, and a displacement enlarging mechanism that enlarges the displacement of the layered piezoelectric element and causes the enlarged displacement to act on the valve element, wherein the piezoelectric valve is characterized in that a surface of the layered piezoelectric element is coated with silicone in a state of being integrated with the actuator.

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Inventors:
ITO TAKAFUMI (JP)
MATSUSHITA TADASHI (JP)
HIGUCHI TOSHIRO (JP)
CHEE SZE KEAT (JP)
MIZUNO YOSHINOBU (JP)
Application Number:
PCT/JP2020/002126
Publication Date:
October 29, 2020
Filing Date:
January 22, 2020
Export Citation:
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Assignee:
SATAKE ENG CO LTD (JP)
MECHANO TRANSF CORPORATION (JP)
International Classes:
H02N2/04; F16K31/02; F16K31/44; H01L41/053; H01L41/09
Domestic Patent References:
WO2009152409A12009-12-17
Foreign References:
JP2016061412A2016-04-25
JPH1174576A1999-03-16
JPH1175382A1999-03-16
JP2000252534A2000-09-14
JP2013124695A2013-06-24
JP2016061412A2016-04-25
JP2017160973A2017-09-14
Other References:
See also references of EP 3961905A4
Attorney, Agent or Firm:
AIWA INTERNATIONAL PATENT AGENCY (JP)
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