公开(公告)号：US11969935B2

公开(公告)日：2024-04-30

申请号：US16467394

申请日：2017-12-05

Applicant: President and Fellows of Harvard College

Inventor： Jennifer A. Lewis ,  Mark A. Skylar-Scott ,  Jochen Mueller

IPC: B29C64/106 ,  B29C48/02 ,  B29C48/05 ,  B29C48/255 ,  B29C48/285 ,  B29C48/30 ,  B29C48/92 ,  B29C64/209 ,  B29C64/321 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00

CPC classification number: B29C64/106 ,  B29C48/02 ,  B29C48/05 ,  B29C48/255 ,  B29C48/2888 ,  B29C48/298 ,  B29C48/304 ,  B29C48/92 ,  B29C64/209 ,  B29C64/321 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00

Abstract: In one aspect, the present disclosure provides a nozzle for a 3D printing system. The nozzle may include a flowpath with a material inlet and a material outlet. The nozzle may further include a valve in fluid communication with the flowpath between the material inlet and the material outlet, where the valve includes a closed state and an open state, where in the closed state the valve obstructs the flowpath between the material inlet and the material outlet, and where in the open state the material inlet is in fluid communication with the material outlet. The nozzle may further include a compensator in fluid communication with the flowpath, where the compensator includes a contracted state associated with the open state of the valve and an expanded state associated with the closed state of the valve.

公开(公告)号：US11897263B2

公开(公告)日：2024-02-13

申请号：US17442979

申请日：2020-03-23

Applicant: President and Fellows of Harvard College

Inventor： Daniele Foresti ,  Aleksandra Markovic ,  Jennifer A. Lewis

IPC: B41J2/14

CPC classification number: B41J2/14008 ,  B22F2999/00 ,  B22F1/107 ,  B22F10/10 ,  B22F2202/01 ,  B22F1/0545

Abstract: A subwavelength resonator for acoustophoretic printing comprises a hollow resonator body for local enhancement of an acoustic field integrated with a nozzle body for delivery of an ink into the acoustic field. The nozzle body has a first end outside the hollow resonator body and a second end inside the hollow resonator body, and includes a fluid channel extending between a fluid inlet at the first end and a fluid outlet at the second end. The fluid channel passes through a side wall of the hollow resonator body and includes at least one bend. During acoustophoretic printing, an ink delivered through the fluid channel of the nozzle body and out of the fluid outlet is exposed to a high-intensity acoustic field.

公开(公告)号：US11648106B2

公开(公告)日：2023-05-16

申请号：US17027941

申请日：2020-09-22

Applicant: Massachusetts Eye and Ear Infirmary ,  President and Fellows of Harvard College

Inventor： Aaron K. Remenschneider ,  Elliott Kozin ,  Nicole Leah Black ,  Michael J. McKenna ,  Daniel J. Lee ,  Jennifer A. Lewis ,  John Rosowski ,  David B. Kolesky ,  Mark A. Skylar-Scott ,  Alexander D. Valentine

IPC: A61F2/18 ,  A61L27/26 ,  A61L27/38 ,  A61L27/54

CPC classification number: A61F2/18 ,  A61L27/26 ,  A61L27/3839 ,  A61L27/54 ,  A61F2002/183 ,  A61F2230/0006 ,  A61F2230/0067 ,  A61F2250/0067 ,  A61L2430/14

Abstract: This disclosure features artificial tympanic membrane graft devices and two-component bilayer graft devices that include a scaffold having a plurality of ribs made of a first material and a plurality of spaces between the ribs filled or made with the first material, a different, second material, a combination of the first and a second materials, or a combination of a second material and one or more other different materials. The bilayer graft devices have two components or layers. One component, e.g., the underlay graft device, can include a projection, and the second component, e.g., the overlay graft device, can include an opening that corresponds to the projection (or vice versa) so that the opening and the projection can secure the two layers together in a “lock and key” manner. This disclosure also features methods of making, using, and implanting the three-dimensional artificial tympanic membrane and bilayer graft devices.

公开(公告)号：US11267981B2

公开(公告)日：2022-03-08

申请号：US16370210

申请日：2019-03-29

Applicant: Massachusetts Institute of Technology ,  President and Fellows of Harvard College

Inventor： Bradley P. Duncan ,  Maxwell E. Plaut ,  Theodore H. Fedynyshyn ,  Jennifer A. Lewis

IPC: C09D11/52 ,  C09D11/037 ,  C09D11/108 ,  C09D11/033 ,  B33Y10/00 ,  B29C64/106 ,  B33Y70/00 ,  H01B1/20 ,  B29K505/00 ,  B33Y80/00 ,  B29K96/04 ,  B29K105/00

Abstract: A 3-D printed device comprising one or more interconnect structures, the interconnect structures comprising a plurality of conductive particles and one or more diblock or triblock copolymers; the diblock or triblock copolymers having an A-B, A-B-A, or A-B-C block-type structure in which the A-blocks and C-blocks are an aromatic-based polymer or an acrylate-based polymer and the B-blocks are an aliphatic-based polymer. These 3-D printed devices may be formed using a method that comprises providing a conductive ink composition; applying the conductive ink composition to a substrate in a 3-D solvent cast printing process to form one or more interconnect structures; and drying the one or more interconnect structures formed from the conductive ink composition. The dried interconnect structures exhibit a conductivity equal to or greater than 1×105 S/m without having to be subjected to any post-processing sintering treatment.

公开(公告)号：US20210008789A1

公开(公告)日：2021-01-14

申请号：US16969681

申请日：2019-02-11

Applicant: President and Fellows of Harvard College

Inventor： Teng-Sing Wei ,  Jennifer A. Lewis

IPC: B29C64/118 ,  B33Y10/00 ,  B33Y80/00 ,  B33Y70/00 ,  H01M4/66 ,  H01M10/0525 ,  H01M2/14 ,  H01M4/04 ,  H01M10/0585

Abstract: A method of 3D printing a battery includes extruding a first electrode ink formulation through a first deposition nozzle moving relative to a substrate, and depositing one or more continuous filaments comprising the first electrode ink formulation on the substrate to print a first electrode. A separator ink formulation is extruded through a second deposition nozzle moving relative to the substrate, and one or more continuous filaments comprising the separator ink formulation is deposited on the first electrode to print a separator precursor, which is then cured to form a separator. A second electrode ink formulation is extruded through a third deposition nozzle moving relative to the substrate, and one or more continuous filaments comprising the second electrode ink formulation is deposited to print a second electrode on the separator. The first and second electrodes and the separator are enclosed in a package, thereby forming a battery with thick electrodes.

公开(公告)号：US20200147873A1

公开(公告)日：2020-05-14

申请号：US16607587

申请日：2018-04-24

Applicant: President and Fellows of Harvard College

Inventor： Jennifer A. Lewis ,  Sebastien Uzel ,  Michael Eriksson

IPC: B29C64/209 ,  B29C64/118 ,  B29C64/268

Abstract: A printhead for 3D printing may include a first nozzle with a first opening configured for an extrusion of ink on a printing surface. The printhead may further include a second nozzle with a second opening configured for an extrusion of ink on the printing surface, where the first nozzle and the second nozzle are positioned to provide simultaneous extrusion of ink on the printing surface, and where a position of the first opening is independently movable relative to a position of the second opening.

公开(公告)号：US20200086564A1

公开(公告)日：2020-03-19

申请号：US16467394

申请日：2017-12-05

Applicant: President and Fellows of Harvard College

Inventor： Jennifer A. Lewis ,  Mark Andrew Skylar-Scott ,  Jochen Mueller

IPC: B29C64/209 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/106 ,  B29C64/321 ,  B33Y40/00

Abstract: In one aspect, the present disclosure provides a nozzle for a 3D printing system. The nozzle may include a flowpath with a material inlet and a material outlet. The nozzle may further include a valve in fluid communication with the flowpath between the material inlet and the material outlet, where the valve includes a closed state and an open state, where in the closed state the valve obstructs the flowpath between the material inlet and the material outlet, and where in the open state the material inlet is in fluid communication with the material outlet. The nozzle may further include a compensator in fluid communication with the flowpath, where the compensator includes a contracted state associated with the open state of the valve and an expanded state associated with the closed state of the valve.

公开(公告)号：US10590294B2

公开(公告)日：2020-03-17

申请号：US15905358

申请日：2018-02-26

Applicant: Northwestern University ,  President and Fellows of Harvard College

Inventor： Mark C. Hersam ,  Yu Teng Liang ,  Ethan B. Secor ,  Pradyumna L. Prabhumirashi ,  Kanan P. Puntambekar ,  Michael L. Geier ,  Bok Y. Ahn ,  Jennifer A. Lewis

IPC: C09D11/30 ,  B82Y30/00 ,  H01B1/24 ,  C09D11/38 ,  C09D11/36 ,  C09D11/322 ,  H01L51/00 ,  C09D11/52 ,  C01B32/19 ,  B41J2/01 ,  B41M5/00 ,  C09D11/14

Abstract: A rapid, scalable methodology for graphene dispersion and concentration with a polymer-organic solvent medium, as can be utilized without centrifugation, to enhance graphene concentration.

公开(公告)号：US20200070402A1

公开(公告)日：2020-03-05

申请号：US16466106

申请日：2017-12-05

Applicant: President and Fellows of Harvard College ,  ETH Zurich (Swiss Federal Institute of Technology)

Inventor： Jennifer A. Lewis ,  Jochen Mueller ,  Jordan R. Raney ,  Kristina Shea

IPC: B29C64/106 ,  B33Y10/00 ,  B33Y70/00

Abstract: A 3D printed core-shell filament comprises an elongated core radially surrounded by an outer shell with a barrier layer in between, where the elongated core comprises a ductile polymer and the outer shell comprises a stiff polymer having a Young's modulus higher than that of the ductile polymer. A lightweight lattice structure may comprise a plurality of the 3D printed core-shell filaments deposited in layers.

公开(公告)号：US20170051806A1

公开(公告)日：2017-02-23

申请号：US15306038

申请日：2015-04-04

Applicant: President and Fellows of Harvard College

Inventor： Sung Hoon Kang ,  Katia Bertoldi ,  Jordan R. Raney ,  Jennifer A. Lewis ,  Sicong Shan

IPC: F16F7/12 ,  B33Y80/00 ,  B33Y50/02 ,  B29C67/00 ,  B33Y10/00

CPC classification number: F16F7/12 ,  B29C64/106 ,  B29C64/386 ,  B29K2995/0046 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y80/00 ,  B60R19/22 ,  E01F15/145 ,  F16F2224/00 ,  F16F2224/025 ,  F16F2230/40 ,  F16F2236/04

Abstract: An energy absorbing cell has a first structural element, a second structural element disposed parallel to and spaced apart from a first structural element, a first intermediate member, and a second intermediate member. Each intermediate member is disposed at an angle between the structural elements. A first end and a second end of each intermediate member are respectively attached to the structural elements. The intermediate members are formed from an elastic material. The angles of the intermediate members are selected such that application of a compressive force to displace the structural elements toward one another triggers a snap-through instability in both intermediate members. The energy absorbing cell is used, singly or in combination with one or more other energy absorbing cells, to form energy absorbing structures, such as vehicle bumpers or highway barriers, adapted to control the deceleration of an object impacting the energy absorbing structure.

Abstract translation: 能量吸收单元具有第一结构元件，与第一结构元件平行并间隔开的第二结构元件，第一中间元件和第二中间元件。 每个中间构件以结构元件之间的角度设置。 每个中间构件的第一端和第二端分别连接到结构元件。 中间构件由弹性材料形成。 中间构件的角度被选择为使得施加压缩力以将结构元件朝向彼此移动会触发两个中间构件中的卡通不稳定性。 能量吸收单元单独地或与一个或多个其它能量吸收单元组合使用，以形成适于控制影响能量吸收结构的物体的减速度的能量吸收结构，例如车辆保险杠或公路障碍物。