Patents by Inventor Yan Nian Liu

Yan Nian 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).

  • Electric motor
    Patent number: 8796900
    Abstract: An electric motor has a stator, a rotor and brush gear. The rotor includes a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft, and rotor windings wound on the rotor core and electrically connected to the commutator. The brush gear includes at least two arcuate brushes for making sliding contact with the commutator. The commutator and brush gear are disposed within a space formed in the rotor core to minimize the axial length of the motor.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 5, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Ji Dong Chai, Yan Nian Liu, Liang Guan, Bao Ting Liu
  • ELECTRIC MOTOR
    Publication number: 20130057089
    Abstract: An electric motor has a stator, a rotor and brush gear. The rotor includes a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft, and rotor windings wound on the rotor core and electrically connected to the commutator. The brush gear includes at least two arcuate brushes for making sliding contact with the commutator. The commutator and brush gear are disposed within a space formed in the rotor core to minimize the axial length of the motor.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 7, 2013
    Inventors: Ji Dong CHAI, Yan Nian Liu, Liang Guan, Bao Ting Liu
  • ELECTRIC MOTOR
    Publication number: 20130058814
    Abstract: An electric motor has a stator, a rotor and brush gear. The rotor includes a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft, and rotor windings wound on the rotor core and electrically connected to the commutator. The brush gear includes at least two arcuate brushes for making sliding contact with the commutator. The commutator and brush gear are disposed within a space formed in the rotor core to minimize the axial length of the motor.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 7, 2013
    Inventors: Ji Dong CHAI, Yan Nian LIU, Liang GUAN, Bao Ting LIU