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    Multi-stack piezo actuator
    12.
    发明授权
    Multi-stack piezo actuator 有权

    公开(公告)号：US11557711B2

    公开(公告)日：2023-01-17

    申请号：US16747354

    申请日：2020-01-20

    Applicant: California Institute of Technology

    Inventor： Hyeong Jae Lee ,  Yoseph Bar-Cohen ,  Mircea Badescu ,  Stewart Sherrit ,  Xiaoqi Bao

    IPC: H01L41/08 ,  B06B1/06 ,  H01L41/083 ,  H01L41/09 ,  H02N2/00

    Abstract: An ultrasonic actuator with increased radiating surface is presented. The increased radiating surface is provided by a plurality of piezoelectric stacks that are each compressed by action of a respective bolt against a common backing structure of the actuator. According to one aspect, each of the stacks includes a plurality of stacked piezoelectric rings with the respective bolt arranged through the central opening of the rings. According to another aspect, one or both of the backing structure and the horn of the actuator include tuning grooves and/or tuning slots to produce amplitude uniformity of displacement through the actuator. According to another aspect, the radiating surface has a symmetrical shape about an axial direction of the actuator with a lateral dimension that is in a range between one quarter and one half of the wavelength of operation of the actuator.

    Flow energy piezoelectric bimorph nozzle harvester
    15.
    发明授权
    Flow energy piezoelectric bimorph nozzle harvester 有权
    流动压电双压缩嘴式收割机

    公开(公告)号：US09531303B2

    公开(公告)日：2016-12-27

    申请号：US14261412

    申请日：2014-04-24

    Applicant: California Institute of Technology ,  CHEVRON U.S.A. INC.

    Inventor： Stewart Sherrit ,  Phillip E. Walkemeyer ,  Jeffrey L. Hall ,  Hyeong Jae Lee ,  Tim Colonius ,  Phillipe Tosi ,  Namhyo Kim ,  Kai Sun ,  Thomas Gary Corbett ,  Alvaro Jose Arrazola

    IPC: H01L41/08 ,  H02N2/18 ,  H01L41/113

    CPC classification number: H02N2/185 ,  H01L41/1136

    Abstract: A flow energy harvesting device having a harvester pipe includes a flow inlet that receives flow from a primary pipe, a flow outlet that returns the flow into the primary pipe, and a flow diverter within the harvester pipe having an inlet section coupled to the flow inlet, a flow constriction section coupled to the inlet section and positioned at a midpoint of the harvester pipe and having a spline shape with a substantially reduced flow opening size at a constriction point along the spline shape, and an outlet section coupled to the constriction section. The harvester pipe may further include a piezoelectric structure extending from the inlet section through the constriction section and point such that the fluid flow past the constriction point results in oscillatory pressure amplitude inducing vibrations in the piezoelectric structure sufficient to cause a direct piezoelectric effect and to generate electrical power for harvesting.

    Abstract translation: 具有收割机管道的流动能量收集装置包括：流入口，其接收来自主管的流动，将流入第一管的流出口，以及收集器管内的分流器，其具有联接到流入口的入口部 ，流动收缩部分，其联接到所述入口部分并且定位在所述收割管的中点处，并且具有在所述花键形状的收缩点处具有基本上减小的流动开口尺寸的花键形状，以及联接到所述收缩部分的出口部分。 收割管还可以包括压电结构，该压电结构从入口部分延伸通过收缩部分并且使得流体流过压缩点的振动压力振幅导致压电结构中的振动，足以产生直接的压电效应并产生 电力收割。

    Monolithic flexure pre-stressed ultrasonic horns
    16.
    发明授权
    Monolithic flexure pre-stressed ultrasonic horns 有权

    公开(公告)号：US09352358B2

    公开(公告)日：2016-05-31

    申请号：US14590971

    申请日：2015-01-06

    Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

    Inventor： Stewart Sherrit ,  Xiaoqi Bao ,  Mircea Badescu ,  Yoseph Bar-Cohen ,  Phillip Grant Allen

    IPC: B06B1/00 ,  B06B1/06 ,  B06B3/00 ,  B23K20/10

    CPC classification number: B06B1/06 ,  B06B3/00 ,  B23K20/10 ,  Y10T29/49826

    Abstract: A monolithic ultrasonic horn where the horn, backing, and pre-stress structures are combined in a single monolithic piece is disclosed. Pre-stress is applied by external flexure structures. The provision of the external flexures has numerous advantages including the elimination of the need for a pre-stress bolt. The removal of the pre-stress bolt eliminates potential internal electric discharge points in the actuator. In addition, it reduces the chances of mechanical failure in the actuator stacks that result from the free surface in the hole of conventional ring stacks. In addition, the removal of the stress bolt and the corresponding reduction in the overall number of parts reduces the overall complexity of the resulting ultrasonic horn actuator and simplifies the ease of the design, fabrication and integration of the actuator of the present invention into other structures.

    FLOW CAGE ASSEMBLIES
    17.
    发明申请
    FLOW CAGE ASSEMBLIES 有权
    流通池组件

    公开(公告)号：US20140374631A1

    公开(公告)日：2014-12-25

    申请号：US14308374

    申请日：2014-06-18

    Applicant: California Institute of Technology

    Inventor： Stewart Sherrit ,  Mircea Badescu ,  Xiaoqi Bao ,  Yoseph Bar-Cohen

    IPC: F16K47/08 ,  F16L55/027 ,  F15D1/02

    CPC classification number: F16K47/08 ,  F15D1/025 ,  F16L55/02718 ,  F16L55/02727 ,  F16L55/02736 ,  F16L55/02781 ,  F16L55/0279 ,  Y10T137/206

    Abstract: Apparatus, systems and methods for implementing flow cages and flow cage assemblies in association with high pressure fluid flows and fluid valves are provided. Flow cages and flow assemblies are provided to dissipate the energy of a fluid flow, such as by reducing fluid flow pressure and/or fluid flow velocity. In some embodiments the dissipation of the fluid flow energy is adapted to reduce erosion, such as from high-pressure jet flows, to reduce cavitation, such as by controllably increasing the flow area, and/or to reduce valve noise associated with pressure surge.

    Abstract translation: 提供了与高压流体流体和流体阀相关联地实现流动笼和流动笼组件的装置，系统和方法。 提供流动保持架和流动组件以消除流体流动的能量，例如通过减少流体流动压力和/或流体流动速度。 在一些实施例中，流体流动能量的耗散适于减少诸如高压喷射流的侵蚀，以减少气穴，例如通过可控地增加流动面积，和/或降低与压力波动相关的阀噪声。

    FLOW ENERGY PIEZOELECTRIC BIMORPH NOZZLE HARVESTER
    18.
    发明申请
    FLOW ENERGY PIEZOELECTRIC BIMORPH NOZZLE HARVESTER 有权
    流量计压电二极管喷嘴收割机

    公开(公告)号：US20140319970A1

    公开(公告)日：2014-10-30

    申请号：US14261412

    申请日：2014-04-24

    Applicant: California Institute of Technology

    Inventor： Stewart Sherrit ,  Phillip E. Walkemeyer ,  Jeffrey L. Hall ,  Hyeong Jae Lee ,  Tim Colonius ,  Luis Phillipe Tosi ,  Namhyo Kim ,  Kai Sun ,  Thomas Gary Corbett ,  Alvaro Jose Arrazola

    IPC: H02N2/18

    CPC classification number: H02N2/185 ,  H01L41/1136

    Abstract: A flow energy harvesting device having a harvester pipe includes a flow inlet that receives flow from a primary pipe, a flow outlet that returns the flow into the primary pipe, and a flow diverter within the harvester pipe having an inlet section coupled to the flow inlet, a flow constriction section coupled to the inlet section and positioned at a midpoint of the harvester pipe and having a spline shape with a substantially reduced flow opening size at a constriction point along the spline shape, and an outlet section coupled to the constriction section. The harvester pipe may further include a piezoelectric structure extending from the inlet section through the constriction section and point such that the fluid flow past the constriction point results in oscillatory pressure amplitude inducing vibrations in the piezoelectric structure sufficient to cause a direct piezoelectric effect and to generate electrical power for harvesting.

    Abstract translation: 具有收割机管道的流动能量收集装置包括：流入口，其接收来自主管的流动，将流入第一管的流出口，以及收集器管内的分流器，其具有联接到流入口的入口部 ，流动收缩部分，其联接到所述入口部分并且定位在所述收割管的中点处，并且具有在所述花键形状的收缩点处具有基本上减小的流动开口尺寸的花键形状，以及联接到所述收缩部分的出口部分。 收割管还可以包括压电结构，该压电结构从入口部分延伸通过收缩部分并且使得流体流过压缩点的振动压力振幅导致压电结构中的振动，足以产生直接的压电效应并产生 电力收割。

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