Patents by Inventor Chi Hang Ngai

Chi Hang Ngai 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: 10612545
    Abstract: A gear pump has a pump body, a pump cylinder connected with the pump body, a driving gear and a driven gear meshed with each other and disposed in the pump cylinder, and a rotor driving the driving gear through a driving shaft, and a sealing member. The pump cylinder is located between the pump body and the sealing member. The driving gear is mounted to or integrally formed with the driving shaft. The open end of the sealing member extends out of the outer housing and is sealingly connected with the pump cylinder so as to form a cavity, and the rotor and the driving gear mounted on the driving shaft are received in the cavity and have a coaxiality with the stator.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: April 7, 2020
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Mohanlal Ramadoss, Wu Liu, Chi Hang Ngai
  • Patent number: 10415566
    Abstract: A gear pump has a pump body, a pump cylinder connected with the pump body, a driving gear and a driven gear meshed with each other and disposed in the pump cylinder, and a motor driving the driving gear through a driving shaft. The pump cylinder is located between the pump body and the motor. The driving gear is mounted to or integrally formed with the driving shaft. A first bearing and a second bearing are disposed on respectively sides of the driving gear, one end of driving shaft is received in the first bearing, and the other end of the driving shaft extends through the second bearing and into the motor and forms a shaft of the motor.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: September 17, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Mohanlal Ramadoss, Wu Liu, Chi Hang Ngai
  • Publication number: 20190242380
    Abstract: A gear pump has a pump body, a pump cylinder connected with the pump body, a driving gear and a driven gear meshed with each other and disposed in the pump cylinder, and a rotor driving the driving gear through a driving shaft, and a sealing member. The pump cylinder is located between the pump body and the sealing member. The driving gear is mounted to or integrally formed with the driving shaft. The open end of the sealing member extends out of the outer housing and is sealingly connected with the pump cylinder so as to form a cavity, and the rotor and the driving gear mounted on the driving shaft are received in the cavity and have a coaxiality with the stator.
    Type: Application
    Filed: April 19, 2019
    Publication date: August 8, 2019
    Inventors: Mohanlal Ramadoss, Wu Liu, Chi Hang Ngai
  • Publication number: 20160108914
    Abstract: A gear pump has a pump body, a pump cylinder connected with the pump body, a driving gear and a driven gear meshed with each other and disposed in the pump cylinder, and a motor driving the driving gear through a driving shaft. The pump cylinder is located between the pump body and the motor. The driving gear is mounted to or integrally formed with the driving shaft. A first bearing and a second bearing are disposed on respectively sides of the driving gear, one end of driving shaft is received in the first bearing, and the other end of the driving shaft extends through the second bearing and into the motor and forms a shaft of the motor.
    Type: Application
    Filed: October 16, 2015
    Publication date: April 21, 2016
    Inventors: Mohanlal RAMADOSS, Wu LIU, Chi Hang NGAI
  • Patent number: 8492953
    Abstract: A small PMDC motor has a wound salient pole armature. The armature 22 has a winding guide 38 disposed within each winding tunnel 36 formed between adjacent salient poles of the armature. The winding guide 38 is arranged to separate the radially inner portion of the respective winding tunnel whereby windings 30 wound about the adjacent salient poles of the armature are restrained from entering into the opposite radially inner portion of the winding tunnel 36.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: July 23, 2013
    Assignee: Johnson Electric S.A.
    Inventors: James Ching Sik Lau, Duncan Yiu Lung Wong, Chi Hang Ngai
  • Publication number: 20080001496
    Abstract: A small PMDC motor has a wound salient pole armature. The armature 22 has a winding guide 38 disposed within each winding tunnel 36 formed between adjacent salient poles of the armature. The winding guide 38 is arranged to separate the radially inner portion of the respective winding tunnel whereby windings 30 wound about the adjacent salient poles of the armature are restrained from entering into the opposite radially inner portion of the winding tunnel 36.
    Type: Application
    Filed: June 28, 2007
    Publication date: January 3, 2008
    Inventors: James Ching Sik Lau, Duncan Yiu Lung Wong, Chi Hang Ngai