Patents by Inventor Shu Dan ZHAO

Shu Dan ZHAO 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).

  • Brush for an electric motor
    Patent number: 9905983
    Abstract: A brush for an electric motor has a brush body having a front end surface configured to make sliding electrical contact with a commutator of the motor. First and second side surfaces are connected to the front end surface. The first side surface and the second side surface are positioned on opposite sides of the brush body in a rotational direction of the commutator. The front end surface has a first contact surface and a second contact surface that contact the commutator earlier than other regions of the front end surface, and are respectively positioned on diametrically opposed corners of the front end surface. In an initial state, the width of the contact area between the brush and the commutator is increased to extend the commutation time.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: February 27, 2018
    Assignee: Johnson Electric S.A.
    Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
  • Brush for an Electric Motor
    Publication number: 20160190757
    Abstract: A brush for an electric motor has a brush body having a front end surface configured to make sliding electrical contact with a commutator of the motor. First and second side surfaces are connected to the front end surface. The first side surface and the second side surface are positioned on opposite sides of the brush body in a rotational direction of the commutator. The front end surface has a first contact surface and a second contact surface that contact the commutator earlier than other regions of the front end surface, and are respectively positioned on diametrically opposed corners of the front end surface. In an initial state, the width of the contact area between the brush and the commutator is increased to extend the commutation time.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 30, 2016
    Inventors: Fa Yun QI, Shu Dan ZHAO, Cheng Shun DU, Rui Feng QIN
  • Electrical brush
    Patent number: D782979
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: April 4, 2017
    Assignee: Johnson Electric S.A.
    Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
  • Electrical brush
    Patent number: D783531
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: April 11, 2017
    Assignee: Johnson Electric S.A.
    Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
  • Electrical brush
    Patent number: D783532
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: April 11, 2017
    Assignee: Johnson Electric S.A.
    Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
  • Electrical brush
    Patent number: D784927
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: April 25, 2017
    Assignee: Johnson Electric S.A.
    Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
  • Electrical brush
    Patent number: D790469
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: June 27, 2017
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin