TREA

Changqing Du

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  • Troy, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Stretch forming die
    • Patent number 10,933,458
    • Issue date Mar 2, 2021
    • FCA US LLC
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Draw-in control for sheet drawing
    • Patent number 10,786,842
    • Issue date Sep 29, 2020
    • FCA US LLC
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Post-compression for springback reduction
    • Patent number 10,668,516
    • Issue date Jun 2, 2020
    • FCA US LLC
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Two-stage method of cutting ultra-high strength material sheet
    • Patent number 10,328,504
    • Issue date Jun 25, 2019
    • FCA US LLC
    • Dajun Zhou
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Machine press
    • Patent number 9,914,164
    • Issue date Mar 13, 2018
    • FCA US LLC
    • John F Siekirk
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Stamping apparatus having flared bead
    • Patent number 9,827,606
    • Issue date Nov 28, 2017
    • FCA US LLC
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Stamping apparatus
    • Patent number 9,149,854
    • Issue date Oct 6, 2015
    • FCA US LLC
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Stamping apparatus and method of use
    • Patent number 9,120,137
    • Issue date Sep 1, 2015
    • FCA US LLC
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

  • Information Patent Application

    METAL FORMING METHOD INCLUDING POST-FORMING STRETCHING TO CONTROL S...
    • Publication number 20200406327
    • Publication date Dec 31, 2020
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    STRETCH FORMING DIE
    • Publication number 20200197997
    • Publication date Jun 25, 2020
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    DRAW-IN CONTROL FOR SHEET DRAWING
    • Publication number 20200078846
    • Publication date Mar 12, 2020
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    TWO-STAGE METHOD OF CUTTING ULTRA-HIGH STRENGTH MATERIAL SHEET
    • Publication number 20180154420
    • Publication date Jun 7, 2018
    • Dajun Zhou
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    MACHINE PRESS
    • Publication number 20180071807
    • Publication date Mar 15, 2018
    • John F Siekirk
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    POST-COMPRESSION FOR SPRINGBACK REDUCTION
    • Publication number 20180056361
    • Publication date Mar 1, 2018
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    METHOD OF INCREMENTAL COLD FORMING AN ANGLED CORNER IN A CONTINUOUS...
    • Publication number 20180021832
    • Publication date Jan 25, 2018
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    STAMPING APPARATUS HAVING FLARED BEAD
    • Publication number 20170157661
    • Publication date Jun 8, 2017
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    STAMPING APPARATUS AND METHOD OF USE
    • Publication number 20130319068
    • Publication date Dec 5, 2013
    • CHRYSLER GROUP LLC
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    STAMPING APPARATUS
    • Publication number 20120279272
    • Publication date Nov 8, 2012
    • Dajun Zhou
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...