Patents by Inventor Letian LI

Letian LI 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: 11946246
    Abstract: The present invention provides an energy-storing temperature control material, and belongs to the technical field of temperature control materials. In the energy-storing temperature control material provided in the present invention, the organic synthetic fiber based phase-change material has a three-dimensional dispersion effect, and can form a network constraint for remaining phase-change materials to reinforce mechanical properties of the materials, thereby fixing shapes of the materials and avoiding a liquid-crystal phase separation phenomenon in the phase-change process. The phase-change energy storage agent can absorb and release the heat by means of solid-liquid phase conversion of the material, to achieve the temperature control effect; and the phase-change temperature regulator can regulate a phase-change temperature range of the phase-change material, to make the energy-storing temperature control material suitable for climatic features of northern China.
    Type: Grant
    Filed: August 9, 2022
    Date of Patent: April 2, 2024
    Assignee: Qilu University of Technology
    Inventors: Letian Qi, Shoujuan Wang, Xia Meng, Fangong Kong, Ruhe Zhao, Chen Han, Debao Li
  • Patent number: 11932288
    Abstract: A double-deck rail vehicle and a vehicle body thereof are provided. An underframe (11) of the vehicle body comprises a lower-layer underframe (111), end underframes (112, 115), sealing plates (114, 116), and side underframes (118, 119); wherein the lower-layer underframe is provided with an underframe middle beam (1111); the end underframe is fixedly connected to the underframe middle beam by means of reinforcement middle beams (113, 117); the sealing plate is fixedly connected between the end underframe and the lower-layer underframe; and the side underframe comprises side beams (1181, 1191) of the side underframe that are integrated, and the side underframe is fixedly connected to the end underframe by means of the side beams of the side underframe. The vehicle body supplements the reinforcement middle beams capable of increasing the connection strength between the end underframe and the lower-layer underframe, and uses the integrated side beams of the side underframe.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: March 19, 2024
    Assignee: CRRC TANGSHAN CO., LTD.
    Inventors: Zhishen Li, Jijun Ma, Letian Fan, Chao Luo, Likui Guo, Zhe Qu, Dongbo Li, Shuoshao Zhang
  • Publication number: 20230215683
    Abstract: Methods and systems for performing sample lift-out and protective cap placement for highly reactive materials within charged particle microscopy systems are disclosed herein. Methods include preparing a nesting void in a support structure, translating at least a portion of a sample into the nesting void, and milling material from a region of the support structure that defines the nesting void. The material from the region of the support structure is milled such that at least some of the removed material redeposits to form an attachment bond between the sample and a remaining portion of the support structure. In various embodiments, the sample can then be investigated using one or more of serial sectioning tomography on the sample, enhanced insertable backscatter detector (CBS) analysis on the sample, and electron backscatter diffraction (EBSD) analysis on the sample.
    Type: Application
    Filed: December 31, 2021
    Publication date: July 6, 2023
    Applicant: FEI Company
    Inventors: Adam STOKES, Cliff BUGGE, Brandon VAN LEER, Valerie BROGDEN, Chengge JIAO, Letian LI, David DONNET