Patents by Inventor DONGFENG MA

DONGFENG MA 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).

  • Patent number: 10103001
    Abstract: A double-tilt in-situ mechanical sample holder for TEM based on piezoelectric ceramic drive belongs to the field of material microstructure-mechanical properties in-situ characterization, and it comprise two parts of sample holder shaft body and piezoelectric ceramic drive system. The sample holder shaft body comprise tilt stage, sample holder, linear stepping motor, drive rod, drive linkage. The piezoelectric ceramic drive system comprise piezoelectric ceramic loading stage, piezoelectric ceramic, connecting base and the sample loading stage realizing stretch or compression function. The double-axis tilt of the samples in X and Y axis directions is realized by the reciprocating motion back and forth of the drive rod driven by the linear stepping motor. The stretch or compression of the samples is realized by applying voltage on the piezoelectric ceramic to generate displacement and push the sample loading stage by the connecting base.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: October 16, 2018
    Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
    Inventors: Xiaodong Han, Jianfei Zhang, Mao Shengcheng, Yadi Zhai, Xiaodong Wang, Zhipeng Li, Taonan Zhang, Dongfeng Ma, Xiaochen Li, Ze Zhang
  • Patent number: 10103000
    Abstract: A double-tilt sample holder for TEM, comprising: it comprise the main body of sample holder body, front-end tilt stage, drive rod, linkage, tilt axis, rotation axis, fixed axis of drive rod and sample loading stage. The axis hole is arranged at the front-end tilt stage, which is connected to the main body of the sample holder body by the tilt axis. The linkage, the boss slot and the drive rod slot are connected by the rotation axis. Two through movement guide grooves are designed symmetrically at both sides of the front-end of sample holder body, and the drive rod is fixed by the fixed axis of the drive rod, which restricts the drive rod to move reciprocally in a straight line driven by the linear stepping motor at the back-end of the main body of the holder body, further leading the tilt stage to rotate around the tilt axis. The tilt angle of the sample loading stage can be precisely controlled by the high precision linear stepping motor in the apparatus.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: October 16, 2018
    Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
    Inventors: Xiaodong Han, Jianfei Zhang, Mao Shengcheng, Yadi Zhai, Xiaodong Wang, Zhipeng Li, Xiaochen Li, Taonan Zhang, Dongfeng Ma, Ze Zhang
  • Publication number: 20170301510
    Abstract: A double-tilt sample holder for TEM, comprising: it comprise the main body of sample holder body, front-end tilt stage, drive rod, linkage, tilt axis, rotation axis, fixed axis of drive rod and sample loading stage. The axis hole is arranged at the front-end tilt stage, which is connected to the main body of the sample holder body by the tilt axis. The linkage, the boss slot and the drive rod slot are connected by the rotation axis. Two through movement guide grooves are designed symmetrically at both sides of the front-end of sample holder body, and the drive rod is fixed by the fixed axis of the drive rod, which restricts the drive rod to move reciprocally in a straight line driven by the linear stepping motor at the back-end of the main body of the holder body, further leading the tilt stage to rotate around the tilt axis. The tilt angle of the sample loading stage can be precisely controlled by the high precision linear stepping motor in the apparatus.
    Type: Application
    Filed: December 21, 2016
    Publication date: October 19, 2017
    Inventors: XIAODONG HAN, JIANFEI ZHANG, MAO SHENGCHENG, YADI ZHAI, XIAODONG WANG, ZHIPENG LI, XIAOCHEN LI, TAONAN ZHANG, DONGFENG MA, ZE ZHANG
  • Publication number: 20170301511
    Abstract: A double-tilt in-situ mechanical sample holder for TEM based on piezoelectric ceramic drive belongs to the field of material microstructure-mechanical properties in-situ characterization, and it comprise two parts of sample holder shaft body and piezoelectric ceramic drive system. The sample holder shaft body comprise tilt stage, sample holder, linear stepping motor, drive rod, drive linkage. The piezoelectric ceramic drive system comprise piezoelectric ceramic loading stage, piezoelectric ceramic, connecting base and the sample loading stage realizing stretch or compression function. The double-axis tilt of the samples in X and Y axis directions is realized by the reciprocating motion back and forth of the drive rod driven by the linear stepping motor. The stretch or compression of the samples is realized by applying voltage on the piezoelectric ceramic to generate displacement and push the sample loading stage by the connecting base.
    Type: Application
    Filed: December 21, 2016
    Publication date: October 19, 2017
    Inventors: XIAODONG HAN, JIANFEI ZHANG, MAO SHENGCHENG, YADI ZHAI, XIAODONG WANG, ZHIPENG LI, TAONAN ZHANG, DONGFENG MA, XIAOCHEN LI, ZE ZHANG