US 12,004,430 B2
Piezoelectric valve and method of manufacturing the piezoelectric valve
Takafumi Ito, Tokyo (JP); Tadashi Matsushita, Tokyo (JP); Toshiro Higuchi, Tokyo (JP); Sze Keat Chee, Tokyo (JP); and Yoshinobu Mizuno, Ibaraki (JP)
Assigned to SATAKE CORPORATION, Tokyo (JP); and MECHANO TRANSFORMER CORPORATION, Tokyo (JP)
Appl. No. 17/605,914
Filed by SATAKE CORPORATION, Tokyo (JP); and MECHANO TRANSFORMER CORPORATION, Tokyo (JP)
PCT Filed Jan. 22, 2020, PCT No. PCT/JP2020/002126
§ 371(c)(1), (2) Date Oct. 22, 2021,
PCT Pub. No. WO2020/217610, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-082292 (JP), filed on Apr. 23, 2019.
Prior Publication US 2022/0213973 A1, Jul. 7, 2022
Int. Cl. H10N 30/88 (2023.01); F16K 31/00 (2006.01); F16K 31/02 (2006.01); F16K 31/44 (2006.01); H02N 2/04 (2006.01); H10N 30/20 (2023.01); H10N 30/50 (2023.01)
CPC H10N 30/88 (2023.02) [F16K 31/007 (2013.01); F16K 31/02 (2013.01); F16K 31/44 (2013.01); H02N 2/04 (2013.01); H02N 2/043 (2013.01); H10N 30/50 (2023.02); H10N 30/883 (2023.02); F16K 31/004 (2013.01); H10N 30/20 (2023.02)] 8 Claims
OG exemplary drawing
 
1. A piezoelectric valve in which the valve is opened/closed utilizing a displacement of a laminated piezoelectric element, comprising:
a valve main body having a gas pressure chamber that receives compressed gas supplied externally; and
an actuator having a valving element, the laminated piezoelectric element that generates a driving force required for operating the valving element as the displacement, and a displacement enlarging mechanism that enlarges the displacement of the laminated piezoelectric element to be acted on the valving element, the actuator being disposed in the valve main body, wherein
a surface of the laminated piezoelectric element is coated with silicone in a state in which after the laminated piezoelectric element is integrated into the actuator, and
a pair of projecting pieces being positioned between the laminated piezoelectric element and the displacement enlarging mechanism and on both sides along a longitudinal direction of the laminated piezoelectric element, gaps being formed between the pair of projecting pieces and the laminated piezoelectric element.