The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 2021
Filed:
May. 18, 2020
Horiba Stec, Co., Ltd., Kyoto, JP;
Jeffrey Ransdell, Irvine, CA (US);
Kazuya Tokunaga, Kyoto, JP;
HORIBA STEC, Co., Ltd., Kyoto, JP;
Abstract
A fluid control valve can suppress heat generation when discharging charges from a piezo actuator for contraction and reduce energy necessary to drive the piezo actuator. The fluid control valve includes a piezo actuator and a drive circuit connected to the piezo actuator is adapted so that the drive circuit includes: a flyback transformer including a primary side coil connected to a DC power supply DV and a secondary side coil connected to the piezo actuator; a charge switch that is connected to the primary side coil and switched from on to off when the piezo actuator charges; a discharge switch that is connected to the secondary side coil and switched from off to on when the piezo actuator discharges; and a regenerative capacitor that is connected to the primary side coil and into which electric energy due to the discharge of the piezo actuator is regenerated.