Patents by Inventor Lihua Zhao

Lihua Zhao 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).

  • AUTOMATED HANDLING BASED ON PART IDENTIFIER AND LOCATION
    Publication number: 20220097305
    Abstract: In one example in accordance with the present disclosure, a system is described. The system includes a reader to 1) read an identifier from a three-dimensional (3D) System printed object that includes a storage element and 2) read a location of the 3D printed object within a build material bed. An extractor of the system extracts, based on the identifier, a post processing operation to execute on the 3D printed object. A controller of the system controls a post processing operation based on extracted post processing operation information and the location.
    Type: Application
    Filed: June 18, 2019
    Publication date: March 31, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Kristopher J. Erickson, Jarrid Wittkopf, Rafael Ballagas, David Wayne George, Lihua Zhao, William J. Allen
  • SENSING MANUFACTURING CONDITIONS WHILE 3D PRINTING
    Publication number: 20220097307
    Abstract: In one example in accordance with the present disclosure, an additive manufacturing system is described. The additive manufacturing system includes an additive manufacturing device to form a three-dimensional (3D) printed object. A placement device of the additive manufacturing system is to embed a sensing system into build material used to form the 3D printed object. The sensing system is to measure a manufacturing condition during formation of the 3D printed object. The additive manufacturing system also includes a controller to associate manufacturing condition with the 3D printed object.
    Type: Application
    Filed: June 18, 2019
    Publication date: March 31, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Kristopher J. Erickson, Jarrid Wittkopf, Rafael Ballagas, David Wayne George, Lihua Zhao, William J. Allen
  • INTERRUPTED ADDITIVE MANUFACTURING
    Publication number: 20220072773
    Abstract: In one example in accordance with the present disclosure, an additive manufacturing system is described. The additive manufacturing system includes a build material distributor to deposit layers of powdered build material onto a bed to form a three-dimensional (3D) printed object. The additive manufacturing system also includes a controller to interrupt printing of the 3D printed object and to resume printing of the 3D printed object. The additive manufacturing system also includes a heat source to, during an interruption in printing, maintain a temperature of a top surface of the powdered build material between a solidification temperature and a melting temperature for the build material.
    Type: Application
    Filed: May 28, 2019
    Publication date: March 10, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Kristopher J. Erickson, Jarrid Wittkopf, Aja Hartman, Lihua Zhao
  • RADIATION AMOUNT DETERMINATION FOR AN INTENDED SURFACE PROPERTY LEVEL
    Publication number: 20220048259
    Abstract: According to examples, an apparatus includes a processor and a memory on which is stored machine readable instructions. The instructions may cause the processor to identify an intended surface property level for a surface of a three-dimensional (3D) object, determine an amount of radiation to be applied as a flash of radiation onto the surface to obtain the intended surface property level, and output the determined amount of radiation to be applied as a flash of radiation, in which a radiation source is to flash apply the determined amount of radiation onto the surface of the 3D object.
    Type: Application
    Filed: October 28, 2021
    Publication date: February 17, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Krzysztof NAUKA, Andrew E. FITZHUGH, Lihua ZHAO
  • THREE-DIMENSIONAL PRINTING
    Publication number: 20220040918
    Abstract: In an example 3D printing method, an electrical conductivity value for a resistor is identified. Based upon the identified electrical conductivity value, a predetermined amount of a conductive agent is selectively applied to at least a portion of a build material layer in order to introduce a predetermined volume percentage of a conductive material to the resistor. Based upon the identified electrical conductivity value and the predetermined volume percent of the conductive material, a predetermined amount of a resistive agent is selectively applied to the at least a portion of the build material layer in order to introduce a predetermined volume percentage of a resistive material to the resistor. The build material layer is exposed to electromagnetic radiation, whereby the at least the portion coalesces to form a layer of the resistor.
    Type: Application
    Filed: April 29, 2019
    Publication date: February 10, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Jarrid A. Wittkopf, Kristopher J. Erickson, Lihua Zhao
  • OPACIFYING AGENT APPLICATION IN THREE-DIMENSIONAL PRINTING
    Publication number: 20220001596
    Abstract: A three-dimensional printing system includes a controller to instruct a fusing agent distributor to selectively apply a fusing agent to a first region of a layer of build material. The controller also determines a subset of voxels in the layer of build material to provide an opacifying agent based on an opacity value of an opacified region of an object to be generated and instructs an opacifying agent distributor to apply the opacifying agent to the determined subset of voxels.
    Type: Application
    Filed: December 14, 2018
    Publication date: January 6, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Aja Hartman, Alexandra Ju, Mary G. Baker, Lihua Zhao, Howard S. Tom, Melanie M. Gottwals, Ingeborg Tastl
  • PATTERNS IN ADDITIVE MANUFACTURING
    Publication number: 20210402702
    Abstract: In an example, a method includes operating, by a processor, on object model data. The object model data describes at least part of an object to be generated in additive manufacturing. The method also includes determining, by a processor, pattern data. The pattern data comprising areas of variable reflectance intended to be formed on a portion of the object. The method includes determining, by a processor, object generation instructions to apply a fusing agent to at least part of a layer of build material corresponding to the portion of the object in a density corresponding to the reflectance of the generated pattern data.
    Type: Application
    Filed: March 15, 2019
    Publication date: December 30, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Aja Hartman, Lihua Zhao, David Woodlock, Lee Dockstader
  • CONTROLLING GREEN BODY OBJECT DEFORMATION
    Publication number: 20210402467
    Abstract: A shaping composition for controlling deformation of a green body object during heat fusing can include a liquid vehicle present at from 10 wt % to about 80 wt %, based on a total weight of the shape retaining composition, and a metal particulate mixture present at from about 20 wt % to about 90 wt % based on a total weight of the shaping composition. The metal particulate mixture can include aluminum-containing particulates and secondary metal-containing particulates. The metal particulate mixture can have an aluminum elemental content to secondary metal elemental content atomic ratio of about 10:1 to about 1:2.
    Type: Application
    Filed: March 18, 2019
    Publication date: December 30, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: John Samuel Dilip Jangam, Thomas Anthony, Lihua Zhao
  • THREE-DIMENSIONAL PRINTING WITH EPOXY AND AMINE COMPOUNDS
    Publication number: 20210403750
    Abstract: The present disclosure is drawn to multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of making three-dimensional printed articles. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent, a first reactive agent, and a second reactive agent. The fusing agent can include water and a radiation absorber. The first reactive agent can include a first liquid vehicle and an epoxy compound having multiple epoxide groups. The second reactive agent can include a second liquid vehicle and an amine compound having multiple amino groups.
    Type: Application
    Filed: March 18, 2019
    Publication date: December 30, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Adekunle Olubummo, Kyle Wycoff, Aja Hartman, Lihua Zhao
  • Build layer temperature control
    Patent number: 11192306
    Abstract: Examples include an apparatus for generating a three-dimensional object. The apparatus comprises at least one energy source, at least one build layer temperature sensor, and a controller. The controller is to control the at least one energy source to pre-fuse a portion of a build layer in a build area when a build layer temperature is less than a first temperature threshold. The controller is further to, after pre-fusing the portion of the build layer, control the at least one energy source to fuse the portion of the build layer in the build area when the build layer temperature is less than a second threshold.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: December 7, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Yan Zhao, Aja Hartman, Lihua Zhao
  • THREE-DIMENSIONAL METAL OBJECT FORMATION
    Publication number: 20210362234
    Abstract: A shaping composition for three-dimensional metal object formation can include a shaping binder and a metal shaping mixture. The metal shaping mixture can include aluminum-containing particulates, and secondary metal-containing particulates. The aluminum-containing particulates and the secondary metal-containing particulates can be thermally stable in the shaping composition up to a temperature from about 250° C. to about 500° C., but can also be interact at a temperature from about 500° C. to about 1000° C.
    Type: Application
    Filed: March 18, 2019
    Publication date: November 25, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: John Samuel Dilip Jangam, Thomas Anthony, Lihua Zhao
  • FUSING ELECTRONIC COMPONENTS INTO THREE-DIMENSIONAL OBJECTS VIA ADDITIVE MANUFACTURING PROCESSES
    Publication number: 20210362411
    Abstract: In an example, a method is described that includes building a first layer of a three-dimensional heterogeneous object in a first plurality of passes of an additive manufacturing system. An electronic component is inserted directly into the first layer. The electronic component is then fused to the first layer in a second plurality of passes of the additive manufacturing system.
    Type: Application
    Filed: March 13, 2018
    Publication date: November 25, 2021
    Inventors: Kristopher J. Erickson, David George, Sterling Chaffins, Lihua Zhao
  • THREE-DIMENSIONAL PRINTING
    Publication number: 20210355319
    Abstract: An example of a three-dimensional (3D) printing kit includes a build material composition, an epoxy agent to be applied to at least a portion of the build material composition during 3D printing, and a fusing agent to be applied to the at least the portion of the build material composition during 3D printing. The build material composition includes a polyamide having an amino functional group. The epoxy agent includes an epoxy having an epoxide functional group to react with the amino functional group of the polyamide in the at least the portion. The fusing agent includes an energy absorber.
    Type: Application
    Filed: September 22, 2018
    Publication date: November 18, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Adekunle Olubummo, Lihua Zhao, Aja Hartman
  • THREE-DIMENSIONAL PRINTING
    Publication number: 20210354375
    Abstract: In an example of a method for three-dimensional (3D) printing, a build material composition is applied to form a build material layer. The build material composition includes a polyamide. The polyamide is selectively melted, based on a 3D object model, in at least a portion of the build material layer to form a molten portion including molten polyamide. An epoxy agent is selectively applied, based on the 3D object model, on the molten portion of the build material layer. The epoxy agent includes a polyfunctional epoxy, which crosslinks the molten polyamide in the molten portion.
    Type: Application
    Filed: April 29, 2019
    Publication date: November 18, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Adekunle Olubummo, Kyle Wycoff, Aja Hartman, Lihua Zhao
  • Radiation amount determination for an intended surface property level
    Patent number: 11167510
    Abstract: According to examples, an apparatus includes a processor and a memory on which is stored machine readable instructions. The instructions may cause the processor to identify an intended surface property level for a surface of a three-dimensional (3D) object, determine an amount of radiation to be applied as a flash of radiation onto the surface to obtain the intended surface property level, and output the determined amount of radiation to be applied as a flash of radiation, in which a radiation source is to flash apply the determined amount of radiation onto the surface of the 3D object.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: November 9, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Krzysztof Nauka, Andrew E. Fitzhugh, Lihua Zhao
  • SELECTIVELY MELT MICRON-SIZED PARTICLES USING MICRO-MIRRORS
    Publication number: 20210331252
    Abstract: According to examples, an apparatus may include an array of micro-mirrors, each of the micro-mirrors being individually controllable to selectively be in a first position or a second position, and a light source to direct a pulse of light onto the array of micro-mirrors with sufficient intensity to cause micron-sized particles on a powder bed upon which the light is directed from the array of micro-mirrors to at least partially melt. Each of the micro-mirrors that is in the first position may reflect light onto a respective area on a layer of micron-sized particles to at least partially melt the micron-sized particles in the respective area and each of the micro-mirrors that is in the second position may reflect light away from the powder bed on which the micron-sized particles are supported.
    Type: Application
    Filed: July 31, 2018
    Publication date: October 28, 2021
    Inventors: Seongsik Chang, Krzysztof Nauka, Alejandro Manuel De Pena, Lihua Zhao
  • ADDITIVE MANUFACTURING OF THREE-DIMENSIONAL OBJECT
    Publication number: 20210331388
    Abstract: Some examples include an additive manufacturing system including a processor and a memory to store instructions. The instructions cause the processor to generate print data from received data related to a three-dimensional build object. The generated print data includes defined print data to dispensing a first agent at a build area of a build material layer, defined print data to selectively dispensing a second agent at a component receiving area within the build area of the build material layer, the second agent to locally reduce a viscosity of the build material at the component receiving area to a viscous state, and defined print data to position a component within the component receiving area at a time of the component receiving area being in a viscous state.
    Type: Application
    Filed: January 15, 2019
    Publication date: October 28, 2021
    Applicant: Hewlett- Packard Development Company, L.P.
    Inventors: Kristopher Erickson, Jarrid Wittkopf, Lihua Zhao
  • DEVIANT CONTROL IN ADDITIVE MANUFACTURING
    Publication number: 20210299967
    Abstract: In one example, an additive manufacturing process includes: making an object slice by slice, including dispensing a first quantity of each of multiple liquid functional agents on to a layer of fusable build material and then irradiating the layer of build material; while making the object, identifying a deviant region in a slice; and dispensing a second quantity different from the first quantity of at least one of the functional agents into a location corresponding to the deviant region.
    Type: Application
    Filed: April 21, 2021
    Publication date: September 30, 2021
    Inventors: Aja Hartman, Lihua Zhao
  • FUSING AGENT INCLUDING A METAL BIS(DITHIOLENE) SALT
    Publication number: 20210284858
    Abstract: An example of a fusing agent includes a metal bis(dithiolene) salt, a polar aprotic solvent, and a balance of water. An example of a method for making an example of the fusing agent includes adding a metal bis(dithiolene) salt into a liquid vehicle including at least a polar aprotic solvent and water.
    Type: Application
    Filed: October 24, 2017
    Publication date: September 16, 2021
    Inventors: Paul Olubummo, Lihua Zhao, Aja Hartman, Howard S. Tom
  • FLUID EJECTION DEVICE WITH MULTI-CHAMBER NOZZLE
    Publication number: 20210283911
    Abstract: In one example In accordance with the present disclosure, a fluid ejection device is described. The fluid ejection device Includes a number of nozzles to eject fluid. Each nozzle Includes multiple firing chambers to hold fluid. The multiple firing chambers are separated: by a chamber partition. Each nozzle also includes a shared nozzle orifice in a substrate through which to dispense fluid. Each nozzle also Includes multiple ejectors, at least one ejector disposed in each firing chamber, in a common channel of the nozzle, fluid from the multiple firing chambers Is mixed, A height of the common channel is defined by the substrate and the chamber partition and is less than a width of the shared nozzle orifice.
    Type: Application
    Filed: February 7, 2017
    Publication date: September 16, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Ning Ge, David George, Lihua Zhao, Qingqiao Wei, James Abbott, Esteve Comas