Patents by Inventor Hongjiang CAO

Hongjiang CAO 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).

  • Magnetic latching relay of parallel type magnetic circuit
    Patent number: 9754750
    Abstract: A magnetic latching relay of a parallel type magnetic circuit, forming two parallel permanent magnetic circuits on the permanent magnetic circuit of a relay; one of the permanent magnetic circuits is used to provide adequate attraction to an armature, so that permanent magnetic attraction can achieve a balance of applied forces with the counter-force provided by a movable spring, so as to realize relay bistability or state transition more stably.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: September 5, 2017
    Assignee: Xiamen Hongfa Electroacoustic Co., Ltd.
    Inventors: Wenzhi Cai, Zhonghua Tan, Hongjiang Cao, Jinqiang Liu
  • Magnetic Latching Relay of Parallel Type Magnetic Circuit
    Publication number: 20160196942
    Abstract: A magnetic latching relay of a parallel type magnetic circuit, forming two parallel permanent magnetic circuits on the permanent magnetic circuit of a relay; one of the permanent magnetic circuits is used to provide adequate attraction to an armature, so that permanent magnetic attraction can achieve a balance of applied forces with the counter-force provided by a movable spring, so as to realize relay bistability or state transition more stably.
    Type: Application
    Filed: July 22, 2014
    Publication date: July 7, 2016
    Inventors: Wenzhi CAI, Zhonghua TAN, Hongjiang CAO, Jinqiang LIU