Patents by Inventor Yet-Ming Chiang

Yet-Ming Chiang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • FABRICATING AN INTERFACE LAYER FOR REMOVABLE SUPPORT
    Publication number: 20170297097
    Abstract: Support structures are used in certain additive fabrication processes to permit fabrication of a greater range of object geometries. For additive fabrication processes with materials that are subsequently sintered into a final part, an interface layer is fabricated between the object and support in order to inhibit bonding between adjacent surfaces of the support structure and the object during sintering.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 19, 2017
    Inventors: Michael Andrew Gibson, Jonah Samuel Myerberg, Ricardo Fulop, Matthew David Verminski, Richard Remo Fontana, Christopher Allan Schuh, Yet-Ming Chiang, Anastasios John Hart
  • SHRINKABLE SUPPORT STRUCTURES
    Publication number: 20170297111
    Abstract: A variety of additive manufacturing techniques can be adapted to fabricate a substantially net shape object from a computerized model using materials that can be debound and sintered into a fully dense metallic part or the like. However, during sintering, the net shape will shrink as binder escapes and the base material fuses into a dense final part. If the foundation beneath the object does not shrink in a corresponding fashion, the resulting stresses throughout the object can lead to fracturing, warping or other physical damage to the object resulting in a failed fabrication. To address this issue, a variety of techniques are disclosed for substrates and build plates that contract in a manner complementary to the object during debinding and sintering.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 19, 2017
    Inventors: Jonah Samuel Myerberg, Ricardo Fulop, Michael Andrew Gibson, Matthew David Verminski, Richard Remo Fontana, Christopher Allan Schuh, Yet-Ming Chiang, Anastasios John Hart, Jay Collin Tobia, Nihan Tuncer, Brian Daniel Kernan, Tomek Andrzej Brzezinski
  • METHOD FOR FABRICATING AN INTERFACE LAYER TO SEPARATE BINDER JETTED OBJECTS FROM SUPPORT STRUCTURES
    Publication number: 20170297100
    Abstract: Binder jetting techniques can be used to deposit and bind metallic particles or the like in a net shape for debinding and sintering into a final part. Where support structures are required to mitigate deformation of the object during the debinding and/or sintering, an interface layer may be formed between the support structures and portions of the object in order to avoid bonding of the support structure to the object during sintering.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 19, 2017
    Inventors: Michael Andrew Gibson, Jonah Samuel Myerberg, Emanuel Michael Sachs, Ricardo Fulop, Christopher Allan Schuh, Yet-Ming Chiang, Anastasios John Hart
  • SYSTEM FOR FABRICATING AN INTERFACE LAYER TO SEPARATE BINDER JETTED OBJECTS FROM SUPPORT STRUCTURES
    Publication number: 20170297106
    Abstract: Binder jetting techniques can be used to deposit and bind metallic particles or the like in a net shape for debinding and sintering into a final part. Where support structures are required to mitigate deformation of the object during the debinding and/or sintering, an interface layer may be formed between the support structures and portions of the object in order to avoid bonding of the support structure to the object during sintering.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 19, 2017
    Inventors: Jonah Samuel Myerberg, Michael Andrew Gibson, Emanuel Michael Sachs, Ricardo Fulop, Christopher Allan Schuh, Yet-Ming Chiang, Anastasios John Hart
  • FUSED FILAMENT FABRICATION SYSTEM CONFIGURED TO FABRICATE INTERFACE LAYERS FOR BREAKAWAY SUPPORT
    Publication number: 20170297099
    Abstract: A three-dimensional printer uses a fused filament fabrication process to fabricate a net shape object from build materials that can be debound and sintered into a final part. In order to facilitate separation of the object from surrounding support structures, the three-dimensional printer is configured to deposit material between adjacent surfaces of the object and the support that inhibit bonding between adjacent surfaces of the support structure and the object during sintering.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 19, 2017
    Inventors: Michael Andrew Gibson, Jonah Samuel Myerberg, Ricardo Fulop, Matthew David Verminski, Richard Remo Fontana, Christopher Allan Schuh, Yet-Ming Chiang, Anastasios John Hart
  • SINTERABLE ARTICLE WITH REMOVABLE SUPPORT STRUCTURES
    Publication number: 20170297103
    Abstract: Support structures are used in certain additive fabrication processes to permit fabrication of a greater range of object geometries. For additive fabrication processes with materials that are subsequently sintered into a final part, an interface layer is fabricated between the object and support in order to inhibit bonding between adjacent surfaces of the support structure and the object during sintering. Disclosed herein are interface layers suitable for manufacture with an additive manufacturing system that resist the formation of bonds between a support structure and an object during subsequent sintering processes.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 19, 2017
    Inventors: Jonah Samuel Myerberg, Michael Andrew Gibson, Ricardo Fulop, Matthew David Verminski, Richard Remo Fontana, Christopher Allan Schuh, Yet-Ming Chiang, Anastasios John Hart
  • REMOVABLE SINTER SUPPORTS
    Publication number: 20170297102
    Abstract: Additive fabrication systems generally use support structures to expand the available range of features and geometries in fabricated objects. For example, when a vertical shelf or cantilever extends from an object, a supplemental support structure may be required to provide a surface that this feature can be fabricated upon. This process may become more difficult when a surface requiring support is enclosed within a cavity inside an object being fabricated. Techniques are disclosed herein for fabricating supports that can be removed from within cavities in an object.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 19, 2017
    Inventors: Ricardo Chin, Jonah Samuel Myerberg, Michael Andrew Gibson, Ricardo Fulop, Richard Remo Fontana, Christopher Allan Schuh, Yet-Ming Chiang, Anastasios John Hart
  • High energy density redox flow device
    Patent number: 9786944
    Abstract: Redox flow devices are described in which at least one of the positive electrode or negative electrode-active materials is a semi-solid or is a condensed ion-storing electroactive material, and in which at least one of the electrode-active materials is transported to and from an assembly at which the electrochemical reaction occurs, producing electrical energy. The electronic conductivity of the semi-solid is increased by the addition of conductive particles to suspensions and/or via the surface modification of the solid in semi-solids (e.g., by coating the solid with a more electron conductive coating material to increase the power of the device). High energy density and high power redox flow devices are disclosed. The redox flow devices described herein can also include one or more inventive design features. In addition, inventive chemistries for use in redox flow devices are also described.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: October 10, 2017
    Assignees: Massachusetts Institute of Technology, 24M Technologies, Inc.
    Inventors: Yet-Ming Chiang, W. Craig Carter, Bryan Y. Ho, Mihai Duduta, Pimpa Limthongkul
  • LITHIUM METAL ELECTRODES AND BATTERIES THEREOF
    Publication number: 20170288281
    Abstract: The present disclosure is generally related to separators for use in lithium metal batteries, and associated systems and products. Certain embodiments are related to separators that form or are repaired when an electrode is held at a voltage. In some embodiments, an electrochemical cell may comprise an electrolyte that comprises a precursor for the separator.
    Type: Application
    Filed: April 5, 2017
    Publication date: October 5, 2017
    Applicants: Massachusetts Institute of Technology, Carnegie Mellon University, 24M Technologies, Inc.
    Inventors: Yet-Ming CHIANG, Venkatasubramanian VISWANATHAN, Linsen LI, Vikram PANDE, Dilip KRISHNAMURTHY, Zeeshan AHMAD, William Henry WOODFORD
  • NOZZLE CLEANING FOR SEMI-SOLID DEPOSITION NOZZLES
    Publication number: 20170252817
    Abstract: A printer fabricates an object from a computerized model using a fused filament fabrication process and a metallic build material. A nozzle cleaning fixture may be provided for the printer that is shaped to physically dislodge solidified build material and other contaminants from the nozzle. A robotic system for the printer can be used to maneuver the nozzle into engagement with the nozzle cleaning fixture for periodic cleaning, or in response to a diagnostic condition or the like indicating a clogged nozzle.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 7, 2017
    Inventors: Nicholas Mykulowycz, Ricardo Fulop, Jonah Samuel Myerberg, Richard Thomas Burnham, Andrew F. Roberts, Richard Remo Fontana, Anastasios John Hart, Joseph Yosup Shim, Michael Andrew Gibson, Jan Schroers, Christopher Allan Schuh, Matthew David Verminski, Yet-Ming Chiang, Emanuel Michael Sachs
  • DISSOLVABLE BULK METALLIC GLASS SUPPORT MATERIALS
    Publication number: 20170252818
    Abstract: A printer fabricates an object from a computerized model using a fused filament fabrication process and a metallic build material. A thermally compatible support structure may be formed to support regions of the object using a dissolvable bulk metallic glass.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 7, 2017
    Inventors: Michael Andrew Gibson, Richard Remo Fontana, Jonah Samuel Myerberg, Ricardo Fulop, Jan Schroers, Christopher Allan Schuh, Yet-Ming Chiang
  • SEMI-SOLID METALLIC ADDITIVE FABRICATION WITH TEMPERATURE CONTROL USING FORCE FEEDBACK
    Publication number: 20170252820
    Abstract: A control loop for extrusion of a metallic build material such as bulk metallic glass measures a force required to extrude the build material, and uses this sensed parameter to estimate a temperature of the build material. The temperature, or a difference between the estimated temperature and a target temperature, can be used to speed or slow extrusion of the build material to control heat transfer from a heating system along the feedpath. This general control loop may be modified to account for other possible conditions such as nozzle clogging or the onset of crystallization.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 7, 2017
    Inventors: Jonah Samuel Myerberg, Richard Remo Fontana, Michael Andrew Gibson, Ricardo Fulop, Anastasios John Hart, Nicholas Mykulowycz, Joseph Yosup Shim, Jan Schroers, Christopher Allan Schuh, Emanuel Michael Sachs, Peter Alfons Schmitt, Yet-Ming Chiang
  • MONITORING TEMPERATURE WITH SEEBECK EFFECT
    Publication number: 20170252815
    Abstract: A printer fabricates an object from a computerized model using a fused filament fabrication process and a metallic build material. The Seebeck effect can be employed to monitor a temperature difference between a build material and a nozzle that is extruding the build material based on voltage. The temperature difference can, in turn, be used to control operation of the printer or to determine an absolute temperature based on direct measurement of a temperature of the nozzle.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 7, 2017
    Inventors: Richard Remo Fontana, Joseph Yosup Shim, Michael Andrew Gibson, Ricardo Fulop, Anastasios John Hart, Nicholas Mark Mykulowycz, Jonah Samuel Myerberg, Jan Schroers, Christopher Allan Schuh, Yet-Ming Chiang, Emanuel Michael Sachs
  • SPREAD FORMING DEPOSITION
    Publication number: 20170252812
    Abstract: A printer fabricates an object from a build material based on a computerized model and a fused filament fabrication process. A nozzle for depositing the build material has an interior diameter approaching an outer diameter of build material fed to the nozzle in order to reduce extrusion and resistance forces imposed by the nozzle during deposition, while adequately constraining a planar position of the build material for accurate material deposition in a computer-controlled fabrication process.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 7, 2017
    Inventors: Nicholas Mark Mykulowycz, Anastasios John Hart, Ricardo Fulop, Richard Remo Fontana, Jonah Samuel Myerberg, Joseph Yosup Shim, Michael Andrew Gibson, Jan Schroers, Christopher Allan Schuh, Matthew David Verminski, Yet-Ming Chiang, Emanuel Michael Sachs
  • PLASMA DEPASSIVATION
    Publication number: 20170252814
    Abstract: A printer fabricates an object from a computerized model using a fused filament fabrication process and a metallic build material. A plasma depassivation wash is applied during deposition to remove oxidation and improve interlayer bonding between successive layers of the metallic build material. Other techniques such as ultrasonic vibration, formation of energy directors, joule heating, and the like, may be used in combination to form a mechanically robust bond between layers.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 7, 2017
    Inventors: Jonah Samuel Myerberg, Yet-Ming Chiang, Christopher Allan Schuh, Anastasios John Hart, Ricardo Fulop, Richard Remo Fontana, Nicholas Mark Mykulowycz, Joseph Yosup Shim, Michael Andrew Gibson, Jan Schroers, Emanuel Michael Sachs
  • ENERGY DIRECTORS FOR ADDITIVE FABRICATION USING SEMI-SOLID METALLIC EXTRUSION
    Publication number: 20170252813
    Abstract: A printer fabricates an object from a computerized model using a fused filament fabrication process and a build material. One or more energy directors such as ridges are formed in an exposed surface of the deposited build material to provide regions of high, localized contact force that can improve interlayer bonding between successive layers of the build material. An ultrasonic vibrator can also usefully be incorporated into the printer to apply additional energy along these energy directors during deposition of a subsequent layer.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 7, 2017
    Inventors: Jonah Samuel Myerberg, Richard Remo Fontana, Jan Schroers, Ricardo Fulop, Anastasios John Hart, Nicholas Mark Mykulowycz, Joseph Yosup Shim, Michael Andrew Gibson, Christopher Allan Schuh, Matthew David Verminski, Yet-Ming Chiang, Emanuel Michael Sachs
  • Fabricating multi-part assemblies
    Patent number: 9744592
    Abstract: Techniques are disclosed for fabricating multi-part assemblies. In particular, by forming release layers between features such as bearings or gear teeth, complex mechanical assemblies can be fabricated in a single additive manufacturing process.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: August 29, 2017
    Assignee: Desktop Metal, Inc.
    Inventors: Peter Alfons Schmitt, Jonah Samuel Myerberg, Ricardo Fulop, Michael Andrew Gibson, Matthew David Verminski, Richard Remo Fontana, Christopher Allan Schuh, Yet-Ming Chiang, Anastasios John Hart
  • REDOX MEDIATORS FOR METAL-SULFUR BATTERIES
    Publication number: 20170222226
    Abstract: Metal-sulfur energy storage devices also comprising new redox mediator compounds are described.
    Type: Application
    Filed: August 11, 2015
    Publication date: August 3, 2017
    Inventors: Brett A. Helms, Peter D. Frischmann, Yet-Ming Chiang, Frank Y. Fan, Sean E. Doris, Laura C.H. Gerber
  • METAL SULFIDE ELECTRODES AND ENERGY STORAGE DEVICES THEREOF
    Publication number: 20170200966
    Abstract: The present invention generally relates to energy storage devices, and to metal sulfide energy storage devices in particular. Some aspects of the invention relate to energy storage devices comprising at least one flowable electrode, wherein the flowable electrode comprises an electroactive metal sulfide material suspended and/or dissolved in a carrier fluid. In some embodiments, the flowable electrode further comprises a plurality of electronically conductive particles suspended and/or dissolved in the carrier fluid, wherein the electronically conductive particles form a percolating conductive network. An energy storage device comprising a flowable electrode comprising a metal sulfide electroactive material and a percolating conductive network may advantageously exhibit, upon reversible cycling, higher energy densities and specific capacities than conventional energy storage devices.
    Type: Application
    Filed: December 21, 2016
    Publication date: July 13, 2017
    Applicant: Massachusetts Institute of Technology
    Inventors: Yet-Ming Chiang, William Henry Woodford, Frank Y. Fan, Zheng Li, Nir Baram, Kyle C. Smith, W. Craig Carter, Gareth H. McKinley, Ahmed Helal
  • FUSED FILAMENT FABRICATION EXTRUSION NOZZLE WITH CONCENTRIC RINGS
    Publication number: 20170173879
    Abstract: A printer fabricates an object from a computerized model using a fused filament fabrication process. The exit of the nozzle may include a number of concentric rings, where each of which may be selectively opened or closed during extrusion to control extrusion properties such as a volume of extrudate or a mixture of material exiting the nozzle.
    Type: Application
    Filed: December 16, 2016
    Publication date: June 22, 2017
    Inventors: Jonah Samuel Myerberg, Ric Fulop, Matthew David Verminski, Jan Schroers, Richard Remo Fontana, Ricardo Chin, Nicholas Mykulowycz, Joseph Yosup Shim, Christopher Allan Schuh, Emanuel Michael Sachs, Yet-Ming Chiang, Michael Andrew Gibson