Patents by Inventor On Hing CHENG

On Hing CHENG 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).

  • Leaf blower
    Patent number: 8911221
    Abstract: A blower assembly for a leaf blower has a case, a motor, an impeller driven by the motor, and an axial fan driven by the motor. The axial fan and the impeller are connected to opposite ends of the motor. The case has an air inlet, an air outlet and an air channel communicating the air inlet with the air outlet. The impeller is disposed inside the air channel to move air through the air channel from the air inlet to the air outlet. The axial fan is arranged to generate an axial flow of air towards the motor to cool the motor.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: December 16, 2014
    Assignee: Johnson Electric S.A.
    Inventors: On Hing Cheng, Jicheng Pan, Chun Lei Zhang
  • Leaf Blower
    Publication number: 20110223048
    Abstract: A blower assembly for a leaf blower has a case, a motor, an impeller driven by the motor, and an axial fan driven by the motor. The axial fan and the impeller are connected to opposite ends of the motor. The case has an air inlet, an air outlet and an air channel communicating the air inlet with the air outlet. The impeller is disposed inside the air channel to move air through the air channel from the air inlet to the air outlet. The axial fan is arranged to generate an axial flow of air towards the motor to cool the motor.
    Type: Application
    Filed: March 10, 2011
    Publication date: September 15, 2011
    Inventors: On Hing CHENG, Jicheng Pan, Chun Lei Zhang