公开(公告)号：US11305509B1

公开(公告)日：2022-04-19

申请号：US16880237

申请日：2020-05-21

Applicant: HRL LABORATORIES, LLC

Inventor： Jacob M. Hundley ,  Alan J. Jacobsen ,  Sophia S. Yang ,  Zak C. Eckel ,  Christopher S. Roper ,  William Carter

IPC: B32B3/12 ,  B29C65/70

Abstract: A method of manufacturing a sandwich structure having an open cellular core and a fluid-tight seal surrounding the core includes coupling a mold to a first facesheet to define a reservoir. The method also includes irradiating a volume of photo-monomer in the reservoir with a series of vertical collimated light beams to form a cured, solid polymer border extending around a periphery of the first facesheet. The method also includes irradiating a remaining volume of photo-monomer in the reservoir with a series of collimated light beams to form an ordered three-dimensional polymer microstructure core defined by a plurality of interconnected polymer optical waveguides coupled to the first facesheet and surrounded by the cured, solid polymer border. The method further includes coupling a second facesheet to the ordered three-dimensional microstructure core and the cured, solid polymer border to form the sandwich structure.

公开(公告)号：US11118069B1

公开(公告)日：2021-09-14

申请号：US15896457

申请日：2018-02-14

Applicant: HRL Laboratories, LLC

Inventor： Michael H. Risbud Bartl ,  Alan J. Jacobsen

IPC: C09D5/16 ,  C09D5/00 ,  C09D139/06 ,  C09D139/04 ,  C09D133/26 ,  C09D133/20 ,  C09D133/10 ,  C09D133/08 ,  C09D133/04 ,  C09D125/06 ,  C09D109/00 ,  C09D123/28 ,  C09D123/06 ,  C09D123/02 ,  B05D3/00

Abstract: We describe a new approach to fabricate polymeric materials with surface structures for applications as anti-reflective, anti-icing, superhydrophobic, superhydrophilic, de-wetting, and self-cleaning coatings. In some variations, a surface-textured layer comprises first microdomains and second microdomains each containing polymerized cross-linkable photomonomer, where the first microdomains have a higher average cross-link density than that of the second microdomains. The first microdomains and the second microdomains are in a peak-valley surface topology, providing surface texture with no filler particles. In some variations, a method to fabricate a surface-textured layer comprises: applying a cross-linkable photomonomer layer to a reflective substrate; exposing the photomonomer layer to a collimated light beam with no spatial variation, to initiate polymerization in first microdomains; and polymerizing other regions of the photomonomer layer to form second microdomains that are spatially separated from the first microdomains. The first microdomains have a higher average cross-link density compared to the second microdomains.

公开(公告)号：US10994491B2

公开(公告)日：2021-05-04

申请号：US16425566

申请日：2019-05-29

Applicant: HRL LABORATORIES, LLC

Inventor： Jacob M. Hundley ,  Tobias A. Schaedler ,  Sophia S. Yang ,  Alan J. Jacobsen

IPC: B29C33/52 ,  B32B3/12 ,  G03F1/80 ,  C23F1/00 ,  B29C64/40 ,  B29C33/38 ,  B32B9/00 ,  B32B15/04 ,  B32B27/06 ,  B32B27/30 ,  B32B27/32 ,  B32B27/34 ,  B32B27/36 ,  B32B3/26 ,  B32B7/00 ,  B32B7/02 ,  B32B7/04 ,  B32B7/12 ,  B32B9/04 ,  B32B15/00 ,  B32B27/00 ,  B32B27/28 ,  B32B3/00 ,  B32B3/02 ,  B32B3/14 ,  B32B3/18 ,  B32B3/20 ,  B32B3/28 ,  B32B3/30 ,  B29C64/124 ,  B29C64/135 ,  B29C64/129 ,  B29C33/42 ,  B29C35/08 ,  B33Y10/00 ,  B33Y80/00

Abstract: A three-dimensional lattice architecture with a thickness hierarchy includes a first surface and a second surface separated from each other with a distance therebetween defining a thickness of the three-dimensional lattice architecture; a plurality of angled struts extending along a plurality of directions between the first surface and the second surface; a plurality of nodes connecting the plurality of angled struts with one another forming a plurality of unit cells. At least a portion of the plurality of angled struts are internally terminated along the thickness direction of the lattice structure and providing a plurality of internal degrees of freedom towards the first or second surface of the lattice architecture.

公开(公告)号：US10527359B1

公开(公告)日：2020-01-07

申请号：US15671031

申请日：2017-08-07

Applicant: HRL LABORATORIES, LLC

Inventor： Christopher S. Roper ,  Alan J. Jacobsen

IPC: F28D15/04 ,  F28F3/00 ,  B23P15/26

Abstract: A sandwich panel heat pipe with a three-dimensional ordered open-cellular micro-truss core and a method creating the same. In one embodiment, the sandwich panel heat pipe includes a first face sheet, a second face sheet, the three-dimensional ordered open-cellular micro-truss core between the first face sheet and the second face sheet, and a working fluid in the ordered open-cellular micro-truss core. Here, the three-dimensional ordered open-cellular micro-truss core includes a vapor region and a liquid region, the vapor region is for transporting a vapor phase portion of the working fluid to the liquid region, and the liquid region is for transporting a liquid phase portion of the working fluid to the vapor region.

公开(公告)号：US10456956B1

公开(公告)日：2019-10-29

申请号：US15650335

申请日：2017-07-14

Applicant: HRL LABORATORIES, LLC

Inventor： Sophia S. Yang ,  Alan J. Jacobsen ,  Zak C. Eckel ,  Jacob M. Hundley ,  William Carter

IPC: B32B3/12 ,  G03F7/26 ,  B29C35/08 ,  G03F7/20

Abstract: A multi-chemistry structure includes: a plurality of interconnected polymer struts arranged in a lattice; a first layer of the lattice including a first array of first unit cells; a second layer of the lattice including a second array of second unit cells; at least one region of the lattice being formed of a first polymer; and at least one region of the lattice being formed of a second polymer different from the first polymer.

公开(公告)号：US10232583B2

公开(公告)日：2019-03-19

申请号：US14835385

申请日：2015-08-25

Applicant: HRL LABORATORIES, LLC

Inventor： Eric C. Clough ,  Jie Ensberg ,  Alan J. Jacobsen ,  Jacob M. Hundley ,  William Carter ,  Tobias A. Schaedler

IPC: B32B3/08 ,  G03F7/00 ,  G02B6/12 ,  C25D5/56 ,  C25D7/00 ,  G03F7/20 ,  G02B6/00

Abstract: A sparse micro-truss structure having a series of unit cells arranged in an array is disclosed. Each of the unit cells includes a series of struts interconnected at a node. Adjacent unit cells are spaced apart by a gap. Spacing apart the adjacent unit cells is configured to reduce the sensitivity of the sparse micro-truss structure to premature mechanical failure due to buckling in one or more of the struts compared to related art micro-truss structures having a series of fully interconnected unit cells.

公开(公告)号：US10061201B2

公开(公告)日：2018-08-28

申请号：US15333117

申请日：2016-10-24

Applicant: HRL Laboratories, LLC

Inventor： Sophia S. Yang ,  Alan J. Jacobsen ,  Joanna A. Kolodziejska ,  Robert E. Doty ,  William Carter ,  Jacob M. Hundley

IPC: G03F7/20 ,  G02B6/138

CPC classification number: G03F7/70058 ,  B82Y20/00 ,  G02B6/12002 ,  G02B6/138 ,  G02B2006/1219 ,  G03F7/0037 ,  G03F7/2008 ,  G03F7/201 ,  G03F7/2012

Abstract: A system for fabricating micro-truss structures. A reservoir holds a volume of a liquid photomonomer configured to polymerize to form a photopolymer when exposed to suitable light such as ultraviolet light. A mask at the bottom of the reservoir includes a plurality of apertures. Light enters the reservoir through each aperture from several directions, forming a plurality of self-guided photopolymer waveguides within the reservoir. The light is supplied by one or more sources of collimated light. A plurality of mirrors may reflect the light from a single source of collimated light to form a plurality of collimated beams, that illuminate the photomonomer in the reservoir, through the mask, from a corresponding plurality of directions, to form a micro-truss structure including a plurality of self-guided waveguide members.

公开(公告)号：US09890827B2

公开(公告)日：2018-02-13

申请号：US14198323

申请日：2014-03-05

Applicant: HRL LABORATORIES, LLC

Inventor： Tobias A. Schaedler ,  Alan J. Jacobsen ,  Zak C. Eckel ,  Sophia S. Yang ,  Adam E. Sorensen ,  Jacob M. Hundley ,  William Carter ,  Jie Jiang

IPC: B32B3/12 ,  F16F7/12 ,  F41H5/007 ,  B60N3/04 ,  F41H7/04

CPC classification number: F16F7/121 ,  B60N3/048 ,  F41H5/007 ,  F41H7/042

Abstract: Architected materials with superior energy absorption properties when loaded in compression. In several embodiments such materials are formed from micro-truss structures composed of interpenetrating tubes in a volume between a first surface and a second surface. The stress-strain response of these structures, for compressive loads applied to the two surfaces, is tailored by arranging for some but not all of the tubes to extend to both surfaces, adjusting the number of layers of repeated unit cells in the structure, arranging for the nodes to be offset from alignment along lines normal to the surfaces, or including multiple interlocking micro-truss structures.

公开(公告)号：US09770881B1

公开(公告)日：2017-09-26

申请号：US14197073

申请日：2014-03-04

Applicant: HRL Laboratories, LLC

Inventor： Jacob M. Hundley ,  Alan J. Jacobsen ,  William Carter ,  Tobias A. Schaedler ,  Sophia S. Yang

IPC: B32B1/08 ,  B32B37/14

CPC classification number: B32B1/08 ,  B29C53/562 ,  B29C53/566 ,  B29C69/00 ,  B62D21/15 ,  G02B6/138

Abstract: An energy absorbing structure configured to buckle in response to an impulsive load includes a facesheet and a micro-truss core coupled to the facesheet. The facesheet and the micro-truss core are wound together into a hollow tube structure. The hollow tube structure may have any shape suitable for the intended application of the energy absorbing structure, including prismatic shapes, non-prismatic shapes, axisymmetric shapes, and non-axisymmetric shapes. In one embodiment, the stiffness of the micro-truss core varies axially, radially, and/or circumferentially along the energy absorbing structure.

公开(公告)号：US09733429B2

公开(公告)日：2017-08-15

申请号：US14461841

申请日：2014-08-18

Applicant: HRL LABORATORIES, LLC

Inventor： David Page ,  Sophia S. Yang ,  Alan J. Jacobsen ,  Zak C. Eckel ,  Christopher S. Roper ,  William Carter

IPC: G02B6/122 ,  G02B6/138 ,  G02B6/12 ,  B29K96/00 ,  G02B1/00

CPC classification number: G02B6/1225 ,  B29C64/129 ,  B29C64/286 ,  B29K2096/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y80/00 ,  G02B1/002 ,  G02B6/138 ,  G02B2006/12173 ,  G03F7/0037 ,  G03F7/2012 ,  G03F7/70416

Abstract: A system and method for forming microlattice structures of large thickness. In one embodiment, a photomonomer resin is secured in a mold having a transparent bottom, the interior surface of which is coated with a mold-release agent. A substrate is placed in contact with the top surface of the photomonomer resin. The photomonomer resin is illuminated from below by one or more sources of collimated light, through a photomask, causing polymer waveguides to form, extending up to the substrate, forming a microlattice structure connected with the substrate. After a layer of microlattice structure has formed, the substrate is raised using a translation-rotation system, additional photomonomer resin is added to the mold, and the photomonomer resin is again illuminated through the photomask, to form an additional layer of microlattice structure. The process is repeated multiple times to form a stacked microlattice structure.