公开(公告)号：US20220118692A1

公开(公告)日：2022-04-21

申请号：US17504169

申请日：2021-10-18

Applicant: UNIVERSITY OF SOUTHERN CALIFORNIA

Inventor： Yong Chen ,  Huachao Mao

IPC: B29C64/135 ,  B29C64/209 ,  B29C64/35 ,  B29C64/255 ,  B29C64/236 ,  B29C64/232 ,  B29C64/245 ,  B29C64/336 ,  B29C64/268 ,  B29C64/286 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00

Abstract: A method of multi-material 3D printing is performed by an apparatus comprising at least one printhead device; a build platform; a light source; and a computing unit comprising a non-transitory computer-readable medium encoded with program instructions for controlling the at least one printhead device; the build platform; and the light source to perform the method of multi-material 3D printing. In various embodiments, each printhead device comprises a coating section, a curing section, a cleaning section, and optionally, a post-curing section. Each printhead device is configured to perform each of these steps, with the multiple printheads engaged in fabricating a multi-material part layer-by-layer.

公开(公告)号：US20220061964A1

公开(公告)日：2022-03-03

申请号：US17500724

申请日：2021-10-13

Applicant: University of Southern California

Inventor： Behrokh Khoshnevis ,  Hongsheng Tong ,  Yong Chen ,  Philong John Pham ,  Robert Lee

IPC: A61C7/30 ,  A61C7/12 ,  A61C7/28 ,  A61C7/20

Abstract: An orthodontic appliance may include an archwire and multiple orthodontic brackets. The archwire may fit within a human mouth and contain multiple male connectors. Each orthodontic bracket may have a configuration that facilitates attaching the orthodontic bracket to a single tooth. Each orthodontic bracket may allow one of the male connectors to be locked into the orthodontic bracket with a snapping action. The male connector may be unable to slide with respect to the orthodontic bracket after being locked in the orthodontic bracket. A manual unlocking action may allow the male connector to disengage from the orthodontic bracket.

公开(公告)号：US10688771B2

公开(公告)日：2020-06-23

申请号：US15498381

申请日：2017-04-26

Applicant: University of Southern California

Inventor： Yong Chen ,  Yuanrui Li ,  Huachao Mao ,  Wei Wu

IPC: G02B27/42 ,  G02B27/09 ,  G02B26/10 ,  B33Y10/00 ,  B33Y30/00 ,  B29C67/00 ,  B29C64/277 ,  B29C64/135 ,  B29C64/386 ,  G02B5/00 ,  G02B5/22

Abstract: A three-dimensional printing approach based on stereolithography with variable printing resolutions to solve the trade-off between throughput and resolution. In this technology, the variable fabrication resolutions are achieved by switching light wavelength. The apparatus includes an optical filter based on high-contrast gratings. In one embodiment, the minimum printing resolution of the accordingly constructed stereolithography apparatus is reduced to 37 μm.

公开(公告)号：US20190381732A1

公开(公告)日：2019-12-19

申请号：US16440780

申请日：2019-06-13

Applicant: UNIVERSITY OF SOUTHERN CALIFORNIA

Inventor： Yong Chen ,  Jie Jin

IPC: B29C64/245 ,  B29C64/10 ,  B29C64/205

Abstract: A system for additively manufacturing a build part. The system includes a build platform configured for disposition within a resin tank, and a light source configured to cure a layer of resin. The layer of resin is disposed adjacent to a pre-cure build surface of the build part. The system also includes a constrained surface located between the build platform and the light source and configured to form a boundary for the layer of resin disposed between the constrained surface and the pre-cure build surface. The constrained surface is configured to vibrate to reduce a separation force required to separate the constrained surface from a post-cure build surface of the build part. The system also includes a vibratory source configured to vibrate the constrained surface.

公开(公告)号：US10219877B2

公开(公告)日：2019-03-05

申请号：US15249198

申请日：2016-08-26

Applicant: University of Southern California

Inventor： Behrokh Khoshnevis ,  Hongsheng Tong ,  Yong Chen ,  Philong John Pham ,  Robert Lee

IPC: A61C7/30 ,  A61C7/12 ,  A61C7/28 ,  A61C7/20

Abstract: An orthodontic appliance may include an archwire and multiple orthodontic brackets. The archwire may fit within a human mouth and contain multiple male connectors. Each orthodontic bracket may have a configuration that facilitates attaching the orthodontic bracket to a single tooth. Each orthodontic bracket may allow one of the male connectors to be locked into the orthodontic bracket with a snapping action. The male connector may be unable to slide with respect to the orthodontic bracket after being locked in the orthodontic bracket. A manual unlocking action may allow the male connector to disengage from the orthodontic bracket.

公开(公告)号：US20170307902A1

公开(公告)日：2017-10-26

申请号：US15498381

申请日：2017-04-26

Applicant: University of Southern California

Inventor： Yong Chen ,  Yuanrui Li ,  Huachao Mao ,  Wei Wu

IPC: G02B27/42 ,  G02B27/09 ,  G02B26/10 ,  B33Y30/00 ,  B33Y10/00

CPC classification number: B33Y30/00 ,  B29C64/135 ,  B29C64/277 ,  B29C64/386 ,  B33Y10/00 ,  G02B5/005 ,  G02B5/22 ,  G02B26/101 ,  G02B27/0988

Abstract: A three-dimensional printing approach based on stereolithography with variable printing resolutions to solve the trade-off between throughput and resolution. In this technology, the variable fabrication resolutions are achieved by switching light wavelength. The apparatus includes an optical filter based on high-contrast gratings. In one embodiment, the minimum printing resolution of the accordingly constructed stereolithography apparatus is reduced to 37 μm.

公开(公告)号：US11510758B2

公开(公告)日：2022-11-29

申请号：US17500724

申请日：2021-10-13

Applicant: University of Southern California

Inventor： Behrokh Khoshnevis ,  Hongsheng Tong ,  Yong Chen ,  Philong John Pham ,  Robert Lee

IPC: A61C7/30 ,  A61C7/12 ,  A61C7/28 ,  A61C7/20

Abstract: An orthodontic appliance may include an archwire and multiple orthodontic brackets. The archwire may fit within a human mouth and contain multiple male connectors. Each orthodontic bracket may have a configuration that facilitates attaching the orthodontic bracket to a single tooth. Each orthodontic bracket may allow one of the male connectors to be locked into the orthodontic bracket with a snapping action. The male connector may be unable to slide with respect to the orthodontic bracket after being locked in the orthodontic bracket. A manual unlocking action may allow the male connector to disengage from the orthodontic bracket.

公开(公告)号：US20220183797A1

公开(公告)日：2022-06-16

申请号：US17481930

申请日：2021-09-22

Applicant: University of Southern California

Inventor： Behrokh Khoshnevis ,  Hongsheng Tong ,  Yong Chen ,  Philong John Pham ,  Robert Lee

IPC: A61C7/30 ,  A61C7/12 ,  A61C7/28

Abstract: An orthodontic appliance may include an archwire and multiple orthodontic brackets. The archwire may fit within a human mouth and contain multiple male connectors. Each orthodontic bracket may have a configuration that facilitates attaching the orthodontic bracket to a single tooth. Each orthodontic bracket may allow one of the male connectors to be locked into the orthodontic bracket with a snapping action. The male connector may be unable to slide with respect to the orthodontic bracket after being locked in the orthodontic bracket. A manual unlocking action may allow the male connector to disengage from the orthodontic bracket.

公开(公告)号：US20210330430A1

公开(公告)日：2021-10-28

申请号：US17305358

申请日：2021-07-06

Applicant: University of Southern California

Inventor： Behrokh Khoshnevis ,  Hongsheng Tong ,  Yong Chen ,  Philong John Pham ,  Robert Lee

IPC: A61C7/30 ,  A61C7/12 ,  A61C7/28

Abstract: An orthodontic appliance may include an archwire and multiple orthodontic brackets. The archwire may fit within a human mouth and contain multiple male connectors. Each orthodontic bracket may have a configuration that facilitates attaching the orthodontic bracket to a single tooth. Each orthodontic bracket may allow one of the male connectors to be locked into the orthodontic bracket with a snapping action. The male connector may be unable to slide with respect to the orthodontic bracket after being locked in the orthodontic bracket. A manual unlocking action may allow the male connector to disengage from the orthodontic bracket.

公开(公告)号：US10894354B2

公开(公告)日：2021-01-19

申请号：US15870628

申请日：2018-01-12

Applicant: University of Southern California

Inventor： Yong Chen ,  Jie Jin

IPC: B29C64/124 ,  B29C64/40 ,  B29C64/295 ,  B29C64/357 ,  B33Y10/00 ,  B29C64/245 ,  B29C64/205 ,  B33Y30/00 ,  B33Y70/00 ,  B29C64/268 ,  B29C35/16

Abstract: Methods and apparatuses for additive manufacturing using stereolithography (“SLA”) materials. The apparatus includes a platform for holding an assembly of SLA resin layers. The apparatus also includes a platform for holding an assembly of SLA resin layers. The apparatus also includes a first movable stage for depositing and curing a portion of the liquid SLA resin on the platform, forming a pattern of cured SLA resin. The apparatus also includes a second movable stage for depositing a low-viscosity non-SLA material in voids in the pattern of cured SLA resin. The apparatus also includes a cooler for cooling the low-viscosity non-SLA material below its freezing point until solidified.