Patents by Inventor Yuming Duan

Yuming Duan 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).

  • Short-current protection action current adjusting method and device thereof and device for multi-pole electromagnetic release
    Patent number: 9991078
    Abstract: A short-circuit protection action current adjusting method and a device thereof for a multi-pole electromagnetic release.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: June 5, 2018
    Assignee: NOARK ELECTRICS (SHANGHAI) CO. LTD.
    Inventors: Denggui Ao, Yongfu Xu, Yuming Duan
  • SHORT-CURRENT PROTECTION ACTION CURRENT ADJUSTING METHOD AND DEVICE THEREOF AND DEVICE FOR MULTI-POLE ELECTROMAGNETIC RELEASE
    Publication number: 20170133186
    Abstract: A short-circuit protection action current adjusting method and a device thereof for a multi-pole electromagnetic release.
    Type: Application
    Filed: January 16, 2015
    Publication date: May 11, 2017
    Inventors: Denggui AO, Yongfu XU, Yuming DUAN
  • Low-voltage circuit breaker with a capability of tripping quickly
    Patent number: 6977567
    Abstract: This invention discloses a low-voltage circuit breaker with a capability of tripping quickly. Its main feature is that at least one of the side faces of the contact device provides an open flange which has an internal through hole, and the bottom of a rotating shaft disposed on the bottom part provides a stressed member. The stressed member receives the over-pressure airflow escaping from the open flange of the contact device to generate a force. The force is passed to the activating member by the rotating shaft and is magnified, then hits the latch quickly and makes a trip. An intermediate step is bypassed due to the force produced earlier, the force which is produced by the electromagnetism part in the heat energy and electromagnetic system, so that the low-voltage breaker can open quickly and reduces opening time greatly and improve the breaking capability.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: December 20, 2005
    Assignee: Zhejiang Chint Electrics Co. Ltd.
    Inventors: Ran Li, Yuming Duan, Guangshu Zheng, Talyu Wang
  • Low-voltage circuit breaker with a capability of tripping quickly
    Publication number: 20050151607
    Abstract: This invention discloses a low-voltage circuit breaker with a capability of tripping quickly. Its main feature is that at least one of the side faces of the contact device provides an open flange which has an internal through hole, and the bottom of a rotating shaft disposed on the bottom part provides a stressed member. The stressed member receives the over-pressure airflow escaping from the open flange of the contact device to generate a force. The force is passed to the activating member by the rotating shaft and is magnified, then hits the latch quickly and makes a trip. An intermediate step is bypassed due to the force produced earlier, the force which is produced by the electromagnetism part in the heat energy and electromagnetic system, so that the low-voltage breaker can open quickly and reduces opening time greatly and improve the breaking capability.
    Type: Application
    Filed: March 10, 2005
    Publication date: July 14, 2005
    Inventors: Ran Li, Yuming Duan, Guangshu Zheng, Talyu Wang