Patents by Inventor Wai Shing Ip

Wai Shing Ip 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).

  • Permanent magnet rotor
    Patent number: 9263920
    Abstract: A permanent magnet rotor includes a shaft, a rotor core fixed to the shaft, a bracket fixed to the rotor core, and a plurality of permanent magnets contacting an outer surface of the rotor core. The bracket includes a base at one axial end thereof, a plurality of arms axially extending from the base and spaced in a circumferential direction, and an end ring connecting the arms at the other axial end thereof. The base has an opening for the insertion of the shaft. The rotor core is positioned between the arms. Each magnet is sandwiched between two adjacent arms. An inner diameter of the end ring is greater than an outer diameter of the rotor core.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: February 16, 2016
    Assignee: Johnson Electric S.A.
    Inventors: Lo Ching Kwok, Wai Shing Ip
  • Electric motor
    Patent number: 7834491
    Abstract: A small size permanent magnet direct current motor has a housing accommodating a permanent magnet stator and a wound rotor. The rotor has a rotor core with a diameter of 23 mm±3 mm and 12 poles and a cylindrical commutator. The motor has an output power of more than 25 watts.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: November 16, 2010
    Assignee: Johnson Electric S.A.
    Inventors: Wen Jun Huan, Jian Wen Zhang, Wai Shing Ip
  • ELECTRIC MOTOR
    Publication number: 20090091211
    Abstract: A small size permanent magnet direct current motor has a housing accommodating a permanent magnet stator and a wound rotor. The rotor has a rotor core with a diameter of 23 mm±3 mm and 12 poles and a cylindrical commutator. The motor has an output power of more than 25 watts.
    Type: Application
    Filed: October 8, 2008
    Publication date: April 9, 2009
    Inventors: Wen Jun HUAN, Jian Wen Zhang, Wai Shing Ip
  • Electric motor
    Patent number: D601958
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: October 13, 2009
    Assignee: Johnson Electric S.A.
    Inventors: Wen Jun Huan, Jian Wen Zhang, Wai Shing Ip