公开(公告)号：US11712717B2

公开(公告)日：2023-08-01

申请号：US16367075

申请日：2019-03-27

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

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

IPC: B06B1/06 ,  B25D16/00 ,  G01V1/00 ,  A61B17/22

CPC classification number: B06B1/0614 ,  A61B17/22012 ,  B25D16/00 ,  G01V1/006 ,  A61B2017/22025 ,  A61B2017/22027 ,  B06B2201/73 ,  B25D2250/311

Abstract: A dual frequency ultrasonic and sonic actuator with constrained impact mass is presented. According to one aspect, displacement of the impact mass is constrained by cavity to which ultrasonic stress from the tip of a horn is applied. According to another aspect, the displacement of the impact mass is constrained by a spring attached to the tip of the horn. According to another aspect, the displacement of the impact mass is constrained by a flexure. The constrained impact mass converts the ultrasonic stress to lower frequency sonic stress that is coupled to a transmitting element for transmission through a surface. According to one aspect, the transmitting element is a longitudinal probe. According to another aspect, the transmitting element is a drill bit used to penetrate though the surface. According to another aspect, the transmitting element is a thumper used to transmit elastic waves though the surface.

公开(公告)号：US10508513B2

公开(公告)日：2019-12-17

申请号：US15486221

申请日：2017-04-12

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Mircea Badescu ,  Stewart Sherrit ,  Xiaoqi Bao ,  Yoseph Bar-Cohen ,  Jeffery L. Hall

IPC: E21B34/14 ,  F16K1/12

Abstract: A valve that allows control of each of one or more flow paths using one actuator is presented. Rotary motion of a motor is transformed into linear motion using a roller screw mechanism. The travel of the roller screw nut is predefined between front and back hard stops that prevent the roller screw from rotating when the stops are reached. A poppet is attached to the nut using a flexible connection. The nut drives a sleeve with inclined surfaces that moves relative to a locking flexure. When the sleeve is driven, it deforms flanges of the locking flexure causing a cantilever end finger of the flexure to move radially and prevent the poppet from being pushed back. If the sleeve is moved farther, a groove on the sleeve engages notches on the fingers creating a detent that prevents the spring to push the sleeve back.

公开(公告)号：US09605771B2

公开(公告)日：2017-03-28

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 ,  F15D1/02 ,  F16L55/027

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.

公开(公告)号：US20160146680A1

公开(公告)日：2016-05-26

申请号：US14948184

申请日：2015-11-20

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Xiaoqi Bao ,  Stewart Sherrit

IPC: G01L1/16 ,  E21B47/06

CPC classification number: E21B47/06 ,  G01L9/0022 ,  G01L9/008

Abstract: A pressure sensor including an enclosure and a bending resonator housed in the enclosure. The bending resonator includes a diaphragm connected to the enclosure, a piezoelectric layer on the diaphragm, and an electrode on the piezoelectric layer. The pressure sensor also includes an electrical terminal coupled to the piezoelectric layer and extending out through the enclosure. The electrical terminal applies an input signal to the piezoelectric layer to resonate the bending resonator. A resonance frequency of the bending resonator changes according to a change in an external pressure applied to the pressure sensor and the resonance frequency of the bending resonator corresponds to the external pressure applied to the pressure sensor.

Abstract translation: 压力传感器包括外壳和容纳在外壳中的弯曲谐振器。 弯曲谐振器包括连接到外壳的隔膜，隔膜上的压电层和压电层上的电极。 压力传感器还包括耦合到压电层并延伸穿过外壳的电端子。 电端子将输入信号施加到压电层以使弯曲谐振器谐振。 弯曲谐振器的谐振频率根据施加到压力传感器的外部压力的变化而变化，并且弯曲谐振器的谐振频率对应于施加到压力传感器的外部压力。

公开(公告)号：US09748870B2

公开(公告)日：2017-08-29

申请号：US14557844

申请日：2014-12-02

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Stewart Sherril ,  Xiaoqi Bao ,  Yoseph Bar-Cohen

IPC: H01L41/053 ,  H01L41/09 ,  H02N2/00 ,  H02N2/12 ,  H02N2/04 ,  H02N2/02 ,  H02N2/10

CPC classification number: H02N2/12 ,  H02N2/0045 ,  H02N2/026 ,  H02N2/04 ,  H02N2/103

Abstract: An apparatus that passes vibrational energy across a mechanical structure lacking a perforation. The disclosed apparatus and method provide the ability to transfer work (rotary or linear motion) across pressure or thermal barriers or in a sterile environment without generating contaminants; the presence of reflectors in the solid barrier to enhance the efficiency of the energy/power transmission, and the ability to produce a bi-directional driving mechanism using a plurality of different mode resonances, such as a fundamental frequency resonance and a higher frequency resonance. In some instances, a plane within the mechanical structure lacking a perforation is a nodal plane of the vibrational energy field.

公开(公告)号：US10349972B2

公开(公告)日：2019-07-16

申请号：US15218979

申请日：2016-07-25

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY ,  PLACIDUS LLC

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

IPC: A61B17/22 ,  A61D1/02 ,  A61B17/3207 ,  A61B17/32 ,  A61B17/00

Abstract: An arterial blockage percussive drill having a guiding sleeve, a drilling wire slidably coupled to the guiding sleeve and a percussive actuator coupled to the drilling wire to longitudinally oscillate the drilling wire into an arterial blockage.

公开(公告)号：US09945207B2

公开(公告)日：2018-04-17

申请号：US14174575

申请日：2014-02-06

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Xiaoqi Bao ,  Mircea Badescu ,  Stewart Sherrit ,  Jeffery L. Hall ,  Yoseph Bar-Cohen

IPC: E21B34/10

CPC classification number: E21B34/10 ,  Y10T137/0368 ,  Y10T137/7738

Abstract: A flow control valve for use in oil well bore holes. The flow control valve includes a plurality of flow paths connected in parallel. The flow control valve operates by successively opening different flow paths, starting with a flow path that requires a reduced force to operate its inlet valve. The flow rate through the flow control valve is controlled by opening and closing different ones of the plurality of flow paths individually or in combination. A flow path that allows fluid to flow at substantially the full flow rate of the valve is provided as one of the parallel paths. A simple mechanical design using poppet valves and at least one cam is described.

公开(公告)号：US20160252406A1

公开(公告)日：2016-09-01

申请号：US15054073

申请日：2016-02-25

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Stewart Sherrit ,  Xiaoqi Bao

IPC: G01K11/26 ,  H03H9/21 ,  H01L41/09 ,  H03H9/17

CPC classification number: G01K11/26 ,  E21B47/065 ,  G01K7/32 ,  H01L41/09 ,  H03H9/17 ,  H03H9/21

Abstract: A method of measuring temperature includes positioning a piezoelectric resonator in an environment exhibiting the temperature to be measured, applying an input signal to the piezoelectric resonator to resonate the piezoelectric resonator, varying a frequency of the input signal over a range of input frequencies, determining the resonance frequency of the piezoelectric resonator, and determining the temperature of the environment by referencing the resonance frequency of the piezoelectric resonator. The resonance frequency of the piezoelectric resonator changes according to a change in the temperature of the environment and the resonance frequency of the piezoelectric resonator corresponds to the temperature of the environment.

Abstract translation: 测量温度的方法包括将压电谐振器定位在呈现待测温度的环境中，向压电谐振器施加输入信号以使压电谐振器谐振，从而在输入频率范围内改变输入信号的频率，确定 压电谐振器的谐振频率，并且通过参考压电谐振器的谐振频率来确定环境的温度。 压电谐振器的谐振频率根据环境温度的变化而变化，并且压电谐振器的谐振频率对应于环境温度。

公开(公告)号：US09418647B2

公开(公告)日：2016-08-16

申请号：US13913044

申请日：2013-06-07

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Yoseph Bar-Cohen ,  Eric D. Archer ,  Xiaoqi Bao ,  Stewart Sherrit

IPC: G10K11/18 ,  E21B47/14 ,  G10K11/34 ,  A61B8/00 ,  E21B47/18

CPC classification number: G10K11/18 ,  A61B8/4483 ,  A61B8/4488 ,  E21B47/14 ,  E21B47/18 ,  G10K11/34

Abstract: A plurality of phased array acoustic communication devices are used to communicate data along a tubulation, such as a well. The phased array acoustic communication devices employ phased arrays of acoustic transducers, such as piezoelectric transducers, to direct acoustic energy in desired directions along the tubulation. The system is controlled by a computer-based controller. Information, including data and commands, is communicated using digital signaling.

Abstract translation: 多个相控阵声学通信装置用于沿着诸如井的管道传送数据。 相控阵声学通信装置使用诸如压电换能器之类的声换能器的相控阵列，以沿着管道将理想的方向引导声能。 该系统由基于计算机的控制器控制。 使用数字信号传送包括数据和命令的信息。

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.