公开(公告)号：US20190353276A1

公开(公告)日：2019-11-21

申请号：US16479013

申请日：2017-12-25

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

Inventor： Takafumi ITO ,  Hironori ARII ,  Tadashi MATSUSHITA ,  Sze Keat CHEE ,  Takeshi YANO

IPC: F16K37/00 ,  H02N2/02 ,  H02N2/06 ,  B07C5/36 ,  F16K31/00 ,  G08B21/18

Abstract: The piezoelectric actuator includes a piezoelectric element; a power supply applying a voltage to the piezoelectric element; a drive circuit that applies a voltage from the power supply to the piezoelectric element by a pulse charge signal and a discharge signal to charge, and discharges the charge charged in the piezoelectric element to drive the piezoelectric element; an abnormality detection circuit that detects an abnormality due to insulation failure of the piezoelectric element, and a control unit that determines whether or not the piezoelectric element is normal based on an abnormality detection signal. The abnormality detection circuit outputs the abnormality detection signal that detects a time corresponding to a period from when a current starts to flow to the piezoelectric element during charging to when a current stops to flow, and it is determined that the piezoelectric element is abnormal when the time is equal to or more than a set time.

公开(公告)号：US20240418286A1

公开(公告)日：2024-12-19

申请号：US18701637

申请日：2022-10-21

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

Inventor： Takafumi ITO ,  Tadashi MATSUSHITA ,  Sze Keat CHEE ,  Zhengli WANG

IPC: F16K31/00 ,  F16K11/22 ,  F16K11/24 ,  F16K27/04

Abstract: A piezoelectric valve includes: actuators having valve discs and configured to drive these valve discs individually; a valve seat plate having valve seats contacted with and separated from the valve discs individually and discharge paths; and a body case accommodating the valve seat plate, and each actuator is fixed to the side face of the valve seat plate so that the valve discs face the valve seats and can be attached to and detached from a fluidic device via a connector part provided to the front face of the body case. The valve seats are provided as a pair to both faces of the valve seat part, the discharge paths opened in the valve seats provided as a pair are formed in the valve seat plate, gas discharge ports are opened in a non-straight manner, and discharge ports of discharge passages are opened in a line.

公开(公告)号：US20220356958A1

公开(公告)日：2022-11-10

申请号：US17622620

申请日：2020-02-28

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

Inventor： Takafumi ITO ,  Tadashi MATSUSHITA ,  Toshiro HIGUCHI ,  Sze Keat CHEE ,  Yoshinobu MIZUNO ,  Toshitada HIRATA

IPC: F16K31/00 ,  F16K27/02 ,  F16K1/54

Abstract: A piezoelectric valve includes: a valve main part including a gas pressure chamber receiving compressed gas supplied from outside; a plate inside the valve main part, and an actuator fixed to the plate and inside the valve main part, which is a case with an opening on a front surface. The plate includes a gas discharge path and a valve seat coming into contact with a valve element of the actuator opening and closing the gas discharge path. A lid member that closes the opening of the case has a gas discharge opening communicating with the gas discharge path of the plate; is welded and fixed to a front surface of the plate, where the gas discharge path opens, on an annular welded part surrounding the gas discharge opening; and is welded and fixed to an end surface of the case on an annular welded part on the outer peripheral part.

公开(公告)号：US20220316617A1

公开(公告)日：2022-10-06

申请号：US17615653

申请日：2020-03-06

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

Inventor： Takafumi ITO ,  Tadashi MATSUSHITA ,  Toshiro HIGUCHI ,  Sze Keat CHEE ,  Kunio EBIHARA ,  Toshitada HIRATA

IPC: F16K31/00 ,  H01L41/09

Abstract: Provided is a piezoelectric actuator that can reduce a risk of air leakage due to weakening of pressing force of a valve element against a valve seat surface and airtightness. The piezoelectric actuator is used for a piezoelectric valve that opens and closes a valve utilizing displacement of a laminated piezoelectric element. The piezoelectric actuator includes: a valve element; a laminated piezoelectric element that generates a driving force, required for operation of the valve element, as a displacement; and a displacement enlargement mechanism that enlarges a displacement of a laminated piezoelectric element and causes the enlarged displacement to act on the valve element. In the piezoelectric actuator, a surface of the valve element to be in contact with a valve seat of the piezoelectric valve is made flat and smooth in a state in which a tensile load is applied to the laminated piezoelectric element.

公开(公告)号：US20220213973A1

公开(公告)日：2022-07-07

申请号：US17605914

申请日：2020-01-22

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

Inventor： Takafumi ITO ,  Tadashi MATSUSHITA ,  Toshiro HIGUCHI ,  Sze Keat CHEE ,  Yoshinobu MIZUNO

IPC: F16K31/00 ,  H01L41/053 ,  H01L41/083

Abstract: Provided is a piezoelectric valve in which the valve is opened/closed utilizing a displacement of a laminated piezoelectric element, including: 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, in which a surface of the laminated piezoelectric element is coated with silicone in a state in which the laminated piezoelectric element is integrated into the actuator.

公开(公告)号：US20240019040A1

公开(公告)日：2024-01-18

申请号：US18039340

申请日：2021-11-30

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

Inventor： Takafumi ITO ,  Sze Keat CHEE

IPC: F16K31/00 ,  F16K27/00

CPC classification number: F16K31/004 ,  F16K27/003

Abstract: A piezoelectric valve including actuators that are respectively adapted to drive valve elements, and a valve body including a gas inlet port, and a plurality of gas outlet ports, the piezoelectric valve is attachable to and detachable from a fluid device via a connector unit including an inlet passage that is communicable at one end with the gas inlet port, and is communicable at another end with an air supply passage of the fluid device, and a plurality of discharge passages that are respectively communicable at one end with the plurality of gas outlet ports, and are respectively communicable at another end with a plurality of gas outlet passages of the fluid device, and a pitch of openings of the plurality of discharge passages on the other end side is greater than a pitch of openings of the plurality of discharge passages on the one end side.

公开(公告)号：US20240011573A1

公开(公告)日：2024-01-11

申请号：US18025463

申请日：2021-09-10

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

Inventor： Takafumi ITO ,  Sze Keat CHEE

IPC: F16K31/00

CPC classification number: F16K31/004

Abstract: A piezoelectric valve including an actuator that drives a valve body; a valve seat plate including a valve seat that is adapted to be positioned in contact with and away from the valve body, and a discharge passage; and a body case that houses the valve seat plate, in which the actuator includes a proximal portion fixed to the valve seat plate, a piezoelectric element having one end portion connected to an attachment face of the proximal portion and extending in a first longitudinal direction, a support portion integrally formed with the proximal portion, the support portion being arranged side-by-side with the piezoelectric element and extending in a second longitudinal direction crossing the first longitudinal direction, an operating portion connected to another end portion of the piezoelectric element and to a distal end portion of the support portion.

公开(公告)号：US20190093784A1

公开(公告)日：2019-03-28

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 ,  F16K31/44 ,  B07C5/342

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.

公开(公告)号：US20170312790A1

公开(公告)日：2017-11-02

申请号：US15531823

申请日：2015-11-18

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION ,  KURODA PNEUMATICS LTD.

Inventor： Takafumi ITO ,  Hidehiko MIZUKAMI ,  Toshitada HIRATA ,  Sze Keat CHEE ,  Toshiro HIGUCHI

IPC: B07C5/36 ,  B07C5/342

CPC classification number: B07C5/366 ,  B07C5/342 ,  B07C5/3422 ,  B07C5/3425 ,  B07C5/36 ,  B07C5/368

Abstract: An ejector for a granular matter color sorter reducing burdens such as cleaning and maintenance in particular associated with a nozzle unit is to be provided. The ejector 10 comprises a nozzle unit 15, a solenoid valve unit 13, and a manifold unit 14. The nozzle unit 15 is constituted by a plurality of nozzle devices 16 that are independent from each other. The solenoid valve unit 13 is constituted by a plurality of solenoid valve devices 19. The respective nozzle devices 16 and the respective solenoid valve devices 19 correspond to each other on a one-on-one basis so that air flow passages of them are connected by an air flow passage of a manifold. The nozzle device 16 and the manifold 29 are detachably connected and made integral in a state where a surface of the nozzle device 16 in which the air flow passage opens and a surface of the manifold 29 in which the air flow passage opens are brought into abutment with each other.

公开(公告)号：US20130256200A1

公开(公告)日：2013-10-03

申请号：US13907629

申请日：2013-05-31

Applicant: MECHANO TRANSFORMER CORPORATION ,  SATAKE CORPORATION

Inventor： Takafumi ITO ,  Teruhiko TAKEUCHI ,  Takeshi YANO ,  Sze Keat CHEE ,  Toshiro HIGUCHI

IPC: B07C5/36 ,  B07C5/342 ,  B07B4/02

CPC classification number: B07C5/366 ,  B07B4/02 ,  B07C5/3422 ,  B07C5/3425 ,  B07C5/365 ,  F16K31/004 ,  Y10S209/938

Abstract: An optical granular material-sorting apparatus includes: a transfer means for transferring objects being sorted; an optical detection means for detecting, at a detection position, objects being sorted as they drop from an end of the transfer means; and a blasting means provided below the optical detection means and designed to blow away objects being sorted through blasting of air based on the result of detection by the optical detection means. The blasting means has a piezoelectric valve which is driven by a driving means to blast air based on the result of detection by the optical detection means. The driving means applies voltage to a piezoelectric element in multiple stages so as to suppress fluctuation in the amount of gas ejected from a gas release channel when the valve opens.

Abstract translation: 光学粒状材料分选装置包括：转印装置，用于转印被分类的物体; 光检测装置，用于在检测位置检测从所述传送装置的端部落下的物体; 以及设置在所述光学检测装置的下方的喷射装置，其被设计成基于所述光学检测装置的检测结果来吹扫被喷射的空气分类的物体。 爆破装置具有压电阀，其由驱动装置驱动，以根据光检测装置的检测结果来鼓风。 驱动装置以多级对压电元件施加电压，以便抑制当阀打开时从气体释放通道喷出的气体量的波动。