Patents by Inventor MING CEN LU

MING CEN LU 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).

  • LOW-VOLTAGE DIRECT CURRENT MOTOR
    Publication number: 20190222075
    Abstract: A low-voltage direct current motor has a stator and a rotor rotatable relative to the stator. The rotor includes a rotary shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft adjacent to the rotor core, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator includes a round housing, a permanent magnet mounted to an inner surface of the housing, and brushes disposed in sliding contact with the commutator. An input voltage of the motor is in the range of 7 to 36V, and a ratio of an outer diameter of the rotor core to an outer diameter of the housing is in the range of 67% to 75%.
    Type: Application
    Filed: December 21, 2018
    Publication date: July 18, 2019
    Inventors: Ming Cen LU, Chi Keung LAW, Ngai Ming LEUNG
  • Low-voltage direct current motor
    Patent number: 10218230
    Abstract: A low-voltage direct current motor has a stator and a rotor rotatable relative to the stator. The rotor includes a rotary shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft adjacent to the rotor core, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator includes a round housing, a permanent magnet mounted to an inner surface of the housing, and brushes disposed in sliding contact with the commutator. An input voltage of the motor is in the range of 7 to 36V, and a ratio of an outer diameter of the rotor core to an outer diameter of the housing is in the range of 67% to 75%.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: February 26, 2019
    Assignee: Johnson Electric International AG
    Inventors: Ming Cen Lu, Chi Keung Law, Ngai Ming Leung
  • Retainer for a rolling bearing
    Patent number: 9599165
    Abstract: A fastening device for a rolling bearing includes a bearing mounting portion disposed at an end of a motor housing, a rolling bearing received in the mounting portion, and a retainer ring disposed between an inner peripheral surface of the mounting portion and a peripheral surface of an outer ring of the rolling bearing. The rolling bearing is fastened to the motor housing by the retainer ring. The retainer ring is resiliently deformable in the radial direction of the rolling bearing.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: March 21, 2017
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Ming Cen Lu, James Ching Sik Lau, Xi Ping Yang, Chi Keung Law
  • LOW-VOLTAGE DIRECT CURRENT MOTOR
    Publication number: 20160372981
    Abstract: A low-voltage direct current motor has a stator and a rotor rotatable relative to the stator. The rotor includes a rotary shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft adjacent to the rotor core, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator includes a round housing, a permanent magnet mounted to an inner surface of the housing, and brushes disposed in sliding contact with the commutator. An input voltage of the motor is in the range of 7 to 36V, and a ratio of an outer diameter of the rotor core to an outer diameter of the housing is in the range of 67% to 75%.
    Type: Application
    Filed: June 17, 2016
    Publication date: December 22, 2016
    Inventors: Ming Cen LU, Chi Keung LAW, Ngai Ming LEUNG
  • RETAINER FOR A ROLLING BEARING
    Publication number: 20160032980
    Abstract: A fastening device for a rolling bearing includes a bearing mounting portion disposed at an end of a motor housing, a rolling bearing received in the mounting portion, and a retainer ring disposed between an inner peripheral surface of the mounting portion and a peripheral surface of an outer ring of the rolling bearing. The rolling bearing is fastened to the motor housing by the retainer ring. The retainer ring is resiliently deformable in the radial direction of the rolling bearing.
    Type: Application
    Filed: July 30, 2015
    Publication date: February 4, 2016
    Inventors: MING CEN LU, JAMES CHING SIK LAU, XI PING YANG, CHI KEUNG LAW