公开(公告)号：US10738905B2

公开(公告)日：2020-08-11

申请号：US16082664

申请日：2017-01-24

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

Inventor： Takafumi Ito ,  Hironori Arii ,  Tadashi Matsushita ,  Sze Keat Chee ,  Takeshi Yano ,  Toshiro Higuchi

IPC: F16K31/02 ,  B07C5/342 ,  F16K31/00 ,  B07C5/36 ,  B07B11/04 ,  B07B4/02 ,  F16K31/44

Abstract: A piezoelectric valve, having superior responsiveness during valve opening and capability to stabilize gas supply at an early stage, includes a gas pressure chamber receiving compressed gas and an exhaust path discharging the compressed gas from the gas pressure chamber; a valve disc placed in the gas pressure chamber to open and close the exhaust path; a piezoelectric element generating a driving force for operation of the valve disc, as a displacement; a displacement magnifying mechanism magnifying the displacement of the piezoelectric element and applying the magnified displacement to the valve disc; and driving means including a signal generator generating a signal including a first prepulse, a second prepulse, and a main pulse, applies a drive voltage to the piezoelectric element using the signal generated by the signal generator, as an input signal to a drive circuit, and drives and opens the valve disc by expanding the piezoelectric element.