Patents by Inventor Yongqing Liu

Yongqing 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).

  • Patent number: 11969846
    Abstract: The present invention proposes an in-situ freezing machining method for an integrated thin-walled array structure. In the method, the area among cups is cut off first; then, the outer walls of a cup array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cup array is carried out. Then, hoisting and turning over are carried out, and the area among cavities is cut off; then, the outer walls of a cavity array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cavity array is carried out. The method realizes in-situ freezing clamping of workpieces, avoids error accumulation caused by repeated installation of a fixture, and can refrigerate efficiently, suppress ambient and cutting thermal interference, and ensure the stability of freezing fixture.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: April 30, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Haibo Liu, Chengxin Wang, Yongqing Wang, Xu Li, Kuo Liu, Xiaofei Ma, Dongming Guo
  • Patent number: 11951530
    Abstract: A high-strength stainless steel rotor and a method for preparing the same, are provided. The high-strength stainless steel rotor, including the following element components by mass percentage: C: 0.03-0.050%, Cr: 14.90-15.80%, Ni: 5.00-5.70%, Cu: 2.20-2.80%, (Nb+Ta): 0.35-0.44%, Mo: 0.45-0.54%, V: 0.06-0.10%, Si: 0.20-0.60%, Mn: 0.40-0.80%, P?0.010%, S?0.010%, O?0.003%, and the balance of iron and inevitable impurities.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: April 9, 2024
    Assignee: CENTRAL IRON AND STEEL RESEARCH INSTITUTE
    Inventors: Zhenbao Liu, Jianxiong Liang, Xiaohui Wang, Yongqing Sun, Changjun Wang, Zhiyong Yang
  • Publication number: 20240082897
    Abstract: A hot extrusion die for a special-shaped square pipe includes a die cavity sleeve with a special-shaped cavity. A hot extrusion mandrel is arranged in the die cavity sleeve. An area between the die cavity sleeve and the hot extrusion mandrel forms a die cavity hole. A first extrusion diversion hole and a second extrusion diversion hole are arranged below the die cavity hole. An integral centroid of the die cavity hole is located at a circle center of a radial cross section of the die cavity sleeve. Further disclosed is a hot extrusion integral forming method for a special-shaped square pipe, including: heating and expanding a blank material; heating the blank material again after expanding; performing hot extrusion on the blank material; and cooling the formed special-shaped square pipe in air to a room temperature, and inspecting surface quality and mechanical properties of the special-shaped square pipe.
    Type: Application
    Filed: April 15, 2021
    Publication date: March 14, 2024
    Applicants: CENTRAL IRON AND STEEL RESEARCH INSTITUTE, HANDAN XINXING SPECIAL STEEL PIPES CO. , LTD.
    Inventors: Zhenbao LIU, Xiaohui WANG, Jianxiong LIANG, Yongqing SUN, Changjun WANG, Zhiyong YANG, Yuguang GAO, Jie GAO, Fuqiang LIU, Ailiang ZHANG
  • Publication number: 20240075568
    Abstract: The present invention proposes an in-situ freezing machining method for an integrated thin-walled array structure. In the method, the area among cups is cut off first; then, the outer walls of a cup array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cup array is carried out. Then, hoisting and turning over are carried out, and the area among cavities is cut off; then, the outer walls of a cavity array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cavity array is carried out. The method realizes in-situ freezing clamping of workpieces, avoids error accumulation caused by repeated installation of a fixture, and can refrigerate efficiently, suppress ambient and cutting thermal interference, and ensure the stability of freezing fixture.
    Type: Application
    Filed: November 17, 2021
    Publication date: March 7, 2024
    Inventors: Haibo LIU, Chengxin WANG, Yongqing WANG, Xu LI, Kuo LIU, Xiaofei MA, Dongming GUO
  • Publication number: 20130312130
    Abstract: Provided are methods for producing a reprogrammed fibroblast or epithelial cell. The methods include growing a plurality of fibroblasts or epithelial cells in monolayer culture to confluency; and disrupting the monolayer culture to place at least a fraction of the plurality of fibroblasts or epithelial cells into suspension culture under conditions sufficient to form one or more embryoid body-like spheres, wherein the one or more embryoid body-like spheres comprise one or more reprogrammed fibroblasts or epithelial cells that express one or more markers not expressed prior to the disrupting step. Also provided are reprogrammed fibroblasts or epithelial cells produced by the disclosed methods, formulations that include reprogrammed fibroblasts or epithelial cells, methods for using the reprogrammed fibroblasts or epithelial cells, methods for producing chimeric non-human mammals that include one or more sphere-induced Pluripotent Cells (siPS), and chimeric non-human mammals produced thereby.
    Type: Application
    Filed: September 23, 2011
    Publication date: November 21, 2013
    Applicant: UNIVERSITY OF LOUISVILLE
    Inventors: Douglas Dean, Yongqing Liu
  • Patent number: 8327007
    Abstract: Systems and methods for SNMP access are disclosed. A computer-implemented method of SNMP access includes mapping a MIB object in a MIB into an XML object in an XML document, generating a class library based on the XML document, creating a service object representative of a service associated with SNMP access to the MIB object, and linking the class library according to the service object to perform the service.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: December 4, 2012
    Assignee: Iyuko Services L.L.C.
    Inventors: Jianping Liu, Yongqing Liu, Fei Yang, Alan Yang
  • Publication number: 20110243898
    Abstract: Provided are methods for producing a reprogrammed fibroblast. The methods can include growing a plurality of fibroblasts in monolayer culture to confluency; and disrupting the monolayer culture to place at least a fraction of the plurality of fibroblasts into suspension culture under conditions sufficient to form one or more embryoid body-like spheres, wherein the one or more embryoid body-like spheres comprise one or more reprogrammed fibroblasts that express one or more markers not expressed by a fibroblast growing in the monolayer culture prior to the disrupting step. Also provided are reprogrammed fibroblasts produced by the disclosed methods, formulations that include reprogrammed fibroblasts, and methods for treating an injury to a tissue in a subject by administering to a subject in need thereof a composition of reprogrammed fibroblast cells in a pharmaceutically acceptable carrier.
    Type: Application
    Filed: November 22, 2010
    Publication date: October 6, 2011
    Applicant: The University of Louisville Research Foundation, Inc.
    Inventors: Douglas Dean, Yongqing Liu
  • Publication number: 20090328192
    Abstract: A method for managing a network based Virtual Private Network (VPN) configuration is disclosed. The method includes configuring a VPN policy using a Graphical User Interface (GUI) of a centralized management server for at least two network devices. A VPN tunnel is established through the GUI of the centralized management server between the two network devices by applying the configured VPN policy.
    Type: Application
    Filed: March 29, 2007
    Publication date: December 31, 2009
    Inventors: Alan Yang, Yongqing Liu, Steve Krems
  • Publication number: 20090006453
    Abstract: Systems and methods for SNMP access are disclosed. A computer-implemented method of SNMP access includes mapping a MIB object in a MIB into an XML object in an XML document, generating a class library based on the XML document, creating a service object representative of a service associated with SNMP access to the MIB object, and linking the class library according to the service object to perform the service.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Inventors: Jianping Liu, Yongqing Liu, Fei Yang, Alan Yang