公开(公告)号：US20220211977A1

公开(公告)日：2022-07-07

申请号：US17583613

申请日：2022-01-25

Applicant: The Regents of the University of California

Inventor： James Friend ,  Gopesh Tilvawala

IPC: A61M25/01 ,  A61B1/00 ,  A61B1/015 ,  A61B1/005 ,  A61M29/00 ,  A61M25/00 ,  A61B17/00 ,  A61M39/02

Abstract: A hydraulically driven surgical apparatus may be a tube enclosing a first channel filled with a first fluid. Changing a fluid pressure in the first channel may trigger a deformation of the tube. The deformation of the tube may perform an action associated with a surgical procedure. Related methods for steering a hydraulically driven surgical apparatus are also provided.

公开(公告)号：US20210393238A1

公开(公告)日：2021-12-23

申请号：US17281869

申请日：2019-10-18

Applicant: The Regents of the University of California

Inventor： Monica Guma ,  James Friend ,  Oscar Vazquez Mena

IPC: A61B8/00 ,  B06B3/00 ,  G10K11/168 ,  G01S15/89 ,  G01S7/521

Abstract: Non-resonant acoustic meta-material, method of fabrication, and uses thereof are disclosed herein. A layer of a first material is formed on a first substrate. A layer of a second material is formed on the layer of the first material to produce a stacked layer of first and second materials. At least a portion of the stacked layer of first and second materials is exposed to a radiation. The exposed portion of the second material is removed from the stacked layer of first and second materials. A cavity is formed using the removed exposed portion of the second material. The cavity includes a membrane formed from at least a portion of the first material. Additionally, an ultrasound system includes an ultrasound transducer and the non-resonant acoustic metamaterial coupled to the ultrasound transducer.

公开(公告)号：US12296340B2

公开(公告)日：2025-05-13

申请号：US17611096

申请日：2020-05-15

Applicant: The Regents of the University of California

Inventor： James Friend ,  Jiyang Mei ,  Gopesh Tilvawala ,  Naiqing Zhang

IPC: B01L3/00 ,  B06B1/06 ,  G01N1/40

Abstract: Articles of manufacture, including an apparatus for omnidirectional spiral surface acoustic wave generation, are provided. An acoustic wave device that generates a plurality of acoustic wave includes a piezoelectric material to convert electric energy into the plurality of acoustic waves. The acoustic wave device also includes a transducer. The transducer includes a plurality of fingers arranged in a spiral formation. The plurality of acoustic waves induce acoustic streaming along the piezoelectric material in multiple directions to isolate a fluid component within a fluid located on the acoustic wave device.

公开(公告)号：US11705586B2

公开(公告)日：2023-07-18

申请号：US17541744

申请日：2021-12-03

Applicant: The Regents of the University of California

Inventor： James Friend ,  An Huang

IPC: H01M10/42 ,  H01M10/44 ,  H01M10/054 ,  H01M10/052 ,  H02J7/00 ,  H01M10/0587 ,  H01M10/48

CPC classification number: H01M10/4235 ,  H01M10/052 ,  H01M10/054 ,  H01M10/0587 ,  H01M10/425 ,  H01M10/44 ,  H01M10/48 ,  H02J7/0068 ,  H02J7/0069 ,  H01M2010/4271

Abstract: A dendrite resistant battery may include a first electrode, a second electrode, and an electrolyte interposed between the first electrode and the second electrode. The dendrite resistant battery may further include at least one acoustic wave device configured to generate a plurality of acoustic waves during a charging of the battery. The charging of the battery may trigger cations from the first electrode to travel through the electrolyte and deposit on the second electrode. The plurality of acoustic waves may agitate the electrolyte to at least homogenize a distribution of cations in the electrolyte. The homogenization of the distribution of cations may prevent a formation of dendrites on the second electrode by at least increasing a uniformity of the deposit of cations on the second electrode. Related methods and systems for battery management are also provided.

公开(公告)号：US20220250072A1

公开(公告)日：2022-08-11

申请号：US17611096

申请日：2020-05-15

Applicant: The Regents of the University of California

Inventor： James Friend ,  Jiyang Mei ,  Gopesh Tilvawala ,  Naiqing Zhang

IPC: B01L3/00 ,  G01N1/40 ,  B06B1/06

Abstract: Articles of manufacture, including an apparatus for omnidirectional spiral surface acoustic wave generation, are provided. An acoustic wave device that generates a plurality of acoustic wave includes a piezoelectric material to convert electric energy into the plurality of acoustic waves. The acoustic wave device also includes a transducer. The transducer includes a plurality of fingers arranged in a spiral formation. The plurality of acoustic waves induce acoustic streaming along the piezoelectric material in multiple directions to isolate a fluid component within a fluid located on the acoustic wave device.

公开(公告)号：US20220140408A1

公开(公告)日：2022-05-05

申请号：US17541744

申请日：2021-12-03

Applicant: The Regents of the University of California

Inventor： James Friend ,  An Huang

IPC: H01M10/42 ,  H01M10/44 ,  H01M10/054 ,  H01M10/052 ,  H02J7/00 ,  H01M10/0587 ,  H01M10/48

Abstract: A dendrite resistant battery may include a first electrode, a second electrode, and an electrolyte interposed between the first electrode and the second electrode. The dendrite resistant battery may further include at least one acoustic wave device configured to generate a plurality of acoustic waves during a charging of the battery. The charging of the battery may trigger cations from the first electrode to travel through the electrolyte and deposit on the second electrode. The plurality of acoustic waves may agitate the electrolyte to at least homogenize a distribution of cations in the electrolyte. The homogenization of the distribution of cations may prevent a formation of dendrites on the second electrode by at least increasing a uniformity of the deposit of cations on the second electrode. Related methods and systems for battery management are also provided.

公开(公告)号：US11266811B2

公开(公告)日：2022-03-08

申请号：US16334695

申请日：2017-09-20

Applicant: The Regents of the University of California

Inventor： James Friend ,  Gopesh Tilvawala

IPC: A61M25/01 ,  A61M25/00 ,  A61M39/02 ,  A61B17/00 ,  A61B1/00 ,  A61B1/005 ,  A61B1/015 ,  A61M29/00 ,  A61B34/30

Abstract: A hydraulically driven surgical apparatus may be a tube enclosing a first channel filled with a first fluid. Changing a fluid pressure in the first channel may trigger a deformation of the tube. The deformation of the tube may perform an action associated with a surgical procedure. Related methods for steering a hydraulically driven surgical apparatus are also provided.

公开(公告)号：US20200164398A1

公开(公告)日：2020-05-28

申请号：US16632303

申请日：2018-07-20

Applicant: The Regents of the University of California

Inventor： James Friend ,  Victor Nizet ,  Monika Kumaraswamy ,  Sean Collignon ,  Gopesh Tilvawala ,  William Connacher

IPC: B05B17/06 ,  B06B1/02 ,  B06B1/06

Abstract: Articles of manufacture, including an apparatus for acoustic wave based atomization, are provided. The apparatus may include a monocrystalline piezoelectric substrate. The monocrystalline piezoelectric substrate may include a surface patterned with at least one wetting region. The monocrystalline piezoelectric substrate may be configured to respond to an electric signal by at least generating acoustic waves including, for example, surface acoustic waves, Bluestein-Gulayev waves, Lamb waves, Love waves, flexural waves, thickness mode vibrations, mixed-mode waves, longitudinal waves, shear mode vibrations, and/or bulk wave vibrations. The acoustic waves may atomizing at least a portion of a material collected within the at least one wetting region to form a mist of the material. Methods for acoustic wave based atomization are also provided.