Patents by Inventor PoJing Liu

PoJing 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).

  • Gantry assembly and a system for replacing single or double railway bridges
    Patent number: 10214395
    Abstract: A gantry assembly includes a main beam extending between a first and a second end. A plurality of legs including a pair of first legs and a pair of second legs attached to the main beam. A pair of first trolleys is slidably attached to the main beam. A first girder is attached to each one of the first trolleys and extends outwardly from the first trolleys for movement with the first trolleys. The first girder includes a pair of posts having a first and a second post disposed spaced from one another. The first post is attached to the first girder and extends downwardly from the first girder. The second post is slidably attached to the first girder and is movable along the first girder toward and away from the main beam allowing the gantry assembly to have different widths to accommodate for a single or double railway bridge.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: February 26, 2019
    Inventors: Da Pan, Yabin Liu, Wei Chen, PoJing Liu
  • GANTRY ASSEMBLY AND A SYSTEM FOR REPLACING SINGLE OR DOUBLE RAILWAY BRIDGES
    Publication number: 20190016568
    Abstract: A gantry assembly includes a main beam extending between a first and a second end. A plurality of legs including a pair of first legs and a pair of second legs attached to the main beam. A pair of first trolleys is slidably attached to the main beam. A first girder is attached to each one of the first trolleys and extends outwardly from the first trolleys for movement with the first trolleys. The first girder includes a pair of posts having a first and a second post disposed spaced from one another. The first post is attached to the first girder and extends downwardly from the first girder. The second post is slidably attached to the first girder and is movable along the first girder toward and away from the main beam allowing the gantry assembly to have different widths to accommodate for a single or double railway bridge.
    Type: Application
    Filed: July 12, 2018
    Publication date: January 17, 2019
    Inventors: Da Pan, Yabin Liu, Wei Chen, PoJing Liu