Patents by Inventor Xiangdong Liu

Xiangdong Liu 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).

  • Publication number: 20230015434
    Abstract: A coaxial dual supersonic oxygen flow cluster oxygen lance comprises an inner layer circular-hole supersonic nozzle assembly, an outer layer water-cooled casting assembly, and a middle layer annular-hole supersonic nozzle assembly arranged between the inner layer circular-hole supersonic nozzle assembly and the outer layer water-cooled casting assembly, wherein the circular-hole supersonic assembly generates a first beam of supersonic oxygen jets and the annular-hole supersonic assembly generates a second beam of supersonic oxygen jets surrounding the first beam of supersonic oxygen jets; and the second beam of supersonic oxygen jets and the first beam of supersonic oxygen jets are in the same direction, and the two beams of supersonic oxygen jets are independently supplied with gas, and are independently adjusted.
    Type: Application
    Filed: September 25, 2019
    Publication date: January 19, 2023
    Applicant: CISDI Engineering Co., Ltd.
    Inventors: Xiangdong Liu, Weijiang Yu, Hangliang Tian, Qiuqiang Shi, Kunxizn Ren
  • Publication number: 20220361864
    Abstract: The present disclosure relates to an occluder pushing device and an occluder delivery system, wherein the pushing device includes a pushing component and a handle. The pushing component includes a pushing tube and a traction element slidably inserted into the pushing tube. The handle is fixedly connected to a proximal end of the pushing tube and internally provided with a moving component and a locking component. The moving component includes a translation mechanism and a rotation mechanism, where the translation mechanism is used to drive the traction element to move axially inside the pushing tube, and the rotation mechanism is used to drive the traction element to rotate axially inside the pushing tube. The locking component is used to lock relative positions of the traction element and the pushing tube, and the rotation mechanism includes a locking structure for locking or releasing linkage between the rotation mechanism and the traction element.
    Type: Application
    Filed: August 2, 2022
    Publication date: November 17, 2022
    Applicant: Lifetech Scientific (Shenzhen) Co., Ltd.
    Inventors: Xiangdong Liu, Xianmiao Chen, Mingjuan Fu
  • Publication number: 20220339012
    Abstract: A lumen stent preform is provided using a plasma nitriding technology, a preparation method thereof, a method for preparing a lumen stent by using the preform, and a lumen stent obtained according to the method. The preform is manufactured by using pure iron or an iron alloy containing no strong nitrogen compound, has a hardness of 160-250HV0.05/10, and has a microstructure that is a deformed structure having a grain size scale greater than or equal to 9 or a deformed structure after cold machining. Alternatively, the preform is an iron alloy containing a strong nitrogen compound, and has a microstructure that is a deformed structure having a grain size scale greater than or equal to 9 or a deformed structure after cold machining. The lumen stem preform meets the requirements of a conventional stent for radial strength and plasticity, so that plasma nitriding is applicable to commercial preparation of a lumen stent.
    Type: Application
    Filed: July 7, 2022
    Publication date: October 27, 2022
    Applicant: BIOTYX MEDICAL (SHENZHEN) CO., LTD.
    Inventors: Deyuan Zhang, Xianmiao Chen, Wenjiao Lin, Xiangdong Liu
  • Publication number: 20220312821
    Abstract: The present disclosure provides a peanut whole-process production line and a method. The peanut whole-process production line includes a peanut cleaning system, a shell breaking system, a skin removing system, a peanut kernel classification system, an ultra-fine pulverization system and a classification packaging system; a first procedure is cleaning and impurity removal of peanuts, breaking of peanut shells is performed after the cleaning and impurity removal of peanuts, removal of peanut kernel skins and ultra-fine pulverization of the peanut shells are respectively performed after the breaking of peanut shells, classification of peanut kernels is performed after the removal of peanut kernel skins, and classification packaging of ultra-fine peanut shell powder is performed after the ultra-fine pulverization of the peanut shells; whole-process processing of peanuts is completed by using the peanut whole-process production line, and peanut resources are fully utilized.
    Type: Application
    Filed: May 9, 2020
    Publication date: October 6, 2022
    Applicants: QINGDAO UNIVERSITY OF TECHNOLOGY, RESEARCH INSTITUTE OF AGRICULTURAL MECHANIZATION, XINJIANG ACADEMY OF AGRICULTURAL SCIENCES, HENAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Mingzheng LIU, Changhe LI, Xinping LI, Xiangdong LIU, Huimin YANG, Yanbin ZHANG, Xiaoming WANG, Yali HOU
  • Publication number: 20220299674
    Abstract: The invention discloses a superconducting gravity gradiometer and a sensitivity improvement method thereof including a pair of superconducting test masses, a pair of negative-stiffness superconducting coils, a pair of positive-stiffness superconducting coils, and a superconducting circuit coupling the test masses into two-degree-of-freedom superconducting magnetic spring oscillators. Superconducting wires are used to connect the negative-stiffness superconducting coils in series to form a superconducting loop, the differential mode stiffness of the two-degree-of-freedom superconducting magnetic spring oscillators is reduced, and the ratio of the common mode stiffness to the differential mode stiffness is increased.
    Type: Application
    Filed: June 23, 2020
    Publication date: September 22, 2022
    Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Xiangdong LIU, Xikai LIU, Dong MA, Lulu WANG
  • Publication number: 20220272757
    Abstract: Systems and methods for communication in 4G and 5G broadband satellite networks are provided. The disclosed methods include Global Navigation Satellite System (GNSS)-independent methods, and GNSS assisted methods that do not require transmission of satellite ephemeris information from a base station to user equipment.
    Type: Application
    Filed: February 25, 2021
    Publication date: August 25, 2022
    Inventor: Xiangdong LIU
  • Patent number: 11419591
    Abstract: The present disclosure relates to an occluder pushing device and an occluder delivery system, wherein the pushing device includes a pushing component and a handle. The pushing component includes a pushing tube and a traction element slidably inserted into the pushing tube. The handle is fixedly connected to a proximal end of the pushing tube and internally provided with a moving component and a locking component. The moving component includes a translation mechanism and a rotation mechanism, where the translation mechanism is used to drive the traction element to move axially inside the pushing tube, and the rotation mechanism is used to drive the traction element to rotate axially inside the pushing tube. The locking component is used to lock relative positions of the traction element and the pushing tube, and the rotation mechanism includes a locking structure for locking or releasing linkage between the rotation mechanism and the traction element.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: August 23, 2022
    Assignee: Lifetech Scientific (Shenzhen) Co. Ltd.
    Inventors: Xiangdong Liu, Xianmiao Chen, Mingjuan Fu
  • Publication number: 20220264502
    Abstract: Provided herein are various improvements to communication systems and satellite-carried communications. In one example, a method provides communication coverage for at least an endpoint device within a cell. The method includes detecting access preamble communications transferred by the endpoint device during a random access slot of a base station by at least applying a selected quantity of successive sets of processing windows in accordance with a round-trip minimum communication delay expected between the base station and the cell, with each of the successive sets shifted in time by a selected duration.
    Type: Application
    Filed: February 16, 2021
    Publication date: August 18, 2022
    Applicant: Lockheed Martin Corporation
    Inventor: Xiangdong Liu
  • Publication number: 20220225655
    Abstract: An intelligent separation device has gas explosion, stirring, drying and negative pressure adsorption devices. The gas explosion device receives conveyed peanut materials with red coats to be removed, and the materials are subjected to gas explosion, so that the peanut kernels and the peanut red coats are preliminarily separated. The stirring device shifts the preliminarily separated peanut kernels and peanut red coats into the drying device. The drying device compresses and heating external air, transfers heat through hot air, and heats and dries the preliminarily separated peanut kernels and peanut red coats, so that the peanut red coats and the peanut kernels are fully separated. The negative pressure adsorption device collects the fully separated peanut kernels and red coats with different densities and masses in a negative pressure adsorption mode.
    Type: Application
    Filed: May 8, 2020
    Publication date: July 21, 2022
    Applicants: QINGDAO UNIVERSITY OF TECHNOLOGY, HENAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, RESEARCH INSTITUTE OF AGRICULTURAL MECHANIZATION, XINJIANG ACADEMY OF AGRICULTURAL SCIENCES
    Inventors: Mingzheng LIU, Changhe LI, Xinping LI, Xiangdong LIU, Huimin YANG, Yanbin ZHANG, Xiaoming WANG, Yali HOU
  • Patent number: 11389308
    Abstract: A lumen stent preform is provided using a plasma nitriding technology, a preparation method thereof, a method for preparing a lumen stent by using the preform, and a lumen stent obtained according to the method. The preform is manufactured by using pure iron or an iron alloy containing no strong nitrogen compound, has a hardness of 160-250HV0.05/10, and has a microstructure that is a deformed structure having a grain size number greater than or equal to 9 or a deformed structure after cold machining. Alternatively, the preform is an iron alloy containing a strong nitrogen compound, and has a microstructure that is a deformed structure having a grain size number greater than or equal to 9 or a deformed structure after cold machining. The lumen stent preform meets the requirements of a conventional stent for radial strength and plasticity, so that plasma nitriding is applicable to commercial preparation of a lumen stent.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: July 19, 2022
    Assignee: Biotyx Medical (Shenzhen) Co. Ltd.
    Inventors: Deyuan Zhang, Xianmiao Chen, Wenjiao Lin, Xiangdong Liu
  • Publication number: 20220118461
    Abstract: The present invention discloses a same-cavity integrated vertical high-speed multistage superfine pulverizing device and method for walnut shells. The same-cavity integrated vertical high-speed multistage superfine pulverizing device for walnut shells includes a double-channel sliding type feeding device and a same-cavity integrated vertical pulverizing device. The same-cavity integrated vertical pulverizing device includes a material lifting disc and a same-cavity integrated vertical pulverizing barrel. A first-stage coarse crushing region, a second-stage fine crushing region, a third-stage pneumatic impact micro pulverizing region and a fourth-stage airflow mill superfine pulverizing region are disposed in the same-cavity integrated vertical pulverizing barrel.
    Type: Application
    Filed: May 9, 2020
    Publication date: April 21, 2022
    Applicants: QINGDAO UNIVERSITY OF TECHNOLOGY, RESEARCH INSTITUTE OF AGRICULTURAL MECHANIZATION, XINJIANG ACADEMY OF AGRICULTURAL SCIENCES, XINJIANG JIANG NING LIGHT INDUSTRIAL MACHINERY ENGINEERING TECHNOLOGY CO., LTD.
    Inventors: Changhe LI, Mingzheng LIU, Xiaoming WANG, Huimin YANG, Xinping LI, Xiangdong LIU, Tuluhon TURDI, Ji CHE, Lianxing GAO, Huayang ZHAO, Xiaowei ZHANG, Yanbin ZHANG, Yifei CHEN, Yali HOU
  • Patent number: 11278399
    Abstract: A heart valve prosthesis device includes a tubular stent body having an inflow end and an outflow end; a leaflet disposed in the lumen of the stent body; and fixing structures connected with the stent body and configured to fix the leaflet on the stent body. The leaflet includes at least two halves, and a connecting portion(s) connecting two adjacent halves. The fixing structure includes a closed hollow portion located on the stent body, and a fixing rod disposed in the hollow portion; one end of the fixing rod is connected to the hollow portion, and the other end is a free end; the connecting portion is hung on the fixing rod from the free end so as to fix the leaflet on the stent body.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: March 22, 2022
    Assignee: LIFETECH SCIENTIFIC (SHENZHEN) CO., LTD
    Inventor: Xiangdong Liu
  • Publication number: 20220079751
    Abstract: An intervention guidance device (10) includes a main body portion (100) and a guidance portion (200). The guidance portion (200) has a contracted configuration and an expanded configuration. In the expanded configuration, the guidance portion (200) has a central area (201) and a closed outer edge (202). In the contracted configuration, the outer edge (202) is farther away from the main body portion (100) than the central area (201), and the guidance portion (200) is restorable from the contracted configuration to the expanded configuration. In the intervention guidance device (10), the radial dimension of the guidance portion (200) is larger than the distance between the chordae tendineae, so that an effective access path that does not cross the chordae tendineae can be established, the subsequent implantation of a heart valve prosthesis does not pass through the chordae tendineae, and the success rate of a heart valve prosthesis implantation surgery can be improved.
    Type: Application
    Filed: July 10, 2019
    Publication date: March 17, 2022
    Applicant: Lifetech Scientific (Shenzhen) Co., Ltd.
    Inventors: Bin Yao, Xiangdong Liu, Wei Jiang, Huixiong Xie
  • Patent number: 11231439
    Abstract: The present disclosure discloses a vertical superconducting magnetic mass-spring oscillator with an adjustable natural frequency, comprising: a proof mass, a negative-stiffness superconducting coil and a positive-stiffness superconducting coil; the negative-stiffness superconducting coil is mounted at an opening of a semi-closed space of the proof mass, so that a part of magnetic lines of the negative-stiffness superconducting coil are in a compressed state in a closed space of the proof mass, and the other part of the magnetic lines of the negative-stiffness superconducting coil are in an expanded state outside the closed space of the proof mass; a vertical magnetic repulsive force applied to the proof mass by the negative-stiffness superconducting coil varies with a displacement of the proof mass from an equilibrium position, with the variation magnitude proportional to the displacement and the variation direction the same as the displacement direction; and the positive-stiffness superconducting coil is mou
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: January 25, 2022
    Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Xiangdong Liu, Jun Luo
  • Patent number: 11135053
    Abstract: The present application provides an implantation method of an artificial heart valve. The implantation method can include forming an incision in the left chest to expose the ventricle; advancing a guide wire kept away from chordae tendineaes through the atrium into the ventricle; advancing a guide wire catcher into the ventricle from the incision to pull out the distal end of the guide wire from the ventricle; and advancing the artificial heart valve into the ventricle from the distal end of the guide wire with a valve deliverer, and placing the artificial heart valve at a primary valve between the ventricle and the atrium along the guide wire. The artificial heart valve may avoid the chordae tendineaes in the heart system through the guide wire track during implantation.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: October 5, 2021
    Assignee: LIFETECH SCIENTIFIC (SHENZHEN) CO., LTD
    Inventors: Zhiwei Wang, Jianzhou Guo, Wenbin Chen, Wei Jiang, Huixiong Xie, Xiangdong Liu, Bin Yao
  • Patent number: 11071624
    Abstract: An artificial heart valve stent including: a tubular stent body having an inflow side end and an outflow side end, the inflow side end and the outflow side end being opposite to each other; an inflow side skirt surrounding the external wall of the stent body; and an outflow side skirt surrounding the external wall of the stent body. In a spread state, free ends of the inflow side skirt and the outflow side skirt extend toward the inflow side end; and the inflow side skirt cooperates with the outflow side skirt to clamp heart valve tissues. The artificial heart valve stent can be steadily arranged on heart valve tissues, prolong the service life of an artificial heart valve and reduce the risk of another artificial heart valve replacement for the patient.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: July 27, 2021
    Assignee: LIFETECH SCIENTIFIC (SHENZHEN) CO., LTD
    Inventors: Jian Zhuang, Huiming Guo, Huanlei Huang, Zhiwei Wang, Xiangdong Liu, Mingjuan Fu, Wei Jiang, Deyuan Zhang
  • Publication number: 20210175961
    Abstract: A satellite communication system includes a satellite, a satellite base station, and a user device. The satellite supports a number of satellite beams. Each satellite beam includes a number of cells. The satellite base station can communicate with the satellite via a feeder link. The user device is in communication with the satellite and the satellite base station. The user device can select a cell that covers a location of the user device based on a cell contour and a quality of a downlink signal received from the satellite base station. The satellite communication system can be operated by using LTE and/or NB-IoT standards, protocols, and/or waveforms.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 10, 2021
    Inventors: Xiangdong Liu, Dilip S. Gokhale, Suresh K. Iyer, Muthuthamby Sreetharan
  • Patent number: 11031999
    Abstract: A satellite communication system includes a satellite, a satellite base station, and a user device. The satellite supports a number of satellite beams. Each satellite beam includes a number of cells. The satellite base station can communicate with the satellite via a feeder link. The user device is in communication with the satellite and the satellite base station. The user device can select a cell that covers a location of the user device based on a cell contour and a quality of a downlink signal received from the satellite base station. The satellite communication system can be operated by using LTE and/or NB-IoT standards, protocols, and/or waveforms.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: June 8, 2021
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Xiangdong Liu, Dilip S. Gokhale, Suresh K. Iyer, Muthuthamby Sreetharan
  • Publication number: 20210030535
    Abstract: A heart valve prosthesis, including a valved stent and valve leaflets, where the valve leaflets are accommodated in the valved stent, at least two valve leaflets are provided and centrosymmetrically distributed along the circumferential direction of an inner surface of the valve leaflet stent, one ends of each of two adjacent valve leaflets are combined together on the valve leaflet stent to form a valve corner, the valved stent is provided with a positioning member, and the projections of a perpendicular line of one of the valve corners to the axis of the valved stent and a perpendicular line of the positioning member to the axis of the valved stent are coincident on a plane perpendicular to the axis of the valved stent. The heart valve prosthesis can considerably reduce regurgitation at the center.
    Type: Application
    Filed: September 25, 2018
    Publication date: February 4, 2021
    Applicant: LIFETECH SCIENTIFIC (SHENZHEN) CO., LTD
    Inventor: Xiangdong LIU
  • Patent number: 10813756
    Abstract: A delivery device used for delivering a heart valve, a blood vessel stent, and the like. The device includes a first stopper and a connecting unit. The connecting unit is provided opposite to the first stopper and can move relative to the first stopper. The connecting unit includes an axial connecting portion and at least two axial shafts. The axial shaft is connected to the connecting portion and faces the first stopper. The connecting unit is used to form, together with the first stopper, an enclosed and locked space.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: October 27, 2020
    Assignee: LIFETECH SCIENTIFIC (SHENZHEN) CO., LTD
    Inventors: Bin Yao, Xiangdong Liu