Patents by Inventor JinKyu Ryu

JinKyu Ryu 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).

  • Elevator door stopping device
    Patent number: 9783392
    Abstract: An elevator door stopping device which can prevent that elevator door is closed by itself when power supplied to a motor for opening and closing the elevator door is interrupted, an improvement of the elevator door stopping device characterized in that a first magnetic body is fixed on a shaft rotating in interlock with opening and closing of the elevator door so as to generate a magnetic force in a radial direction perpendicular to the shaft, and a second magnetic body is fixed on a fixed face spaced apart from the first magnetic body at a predetermined interval in the radial direction in such a manner that the second magnetic body has the opposite pole to the first magnetic body, so that a magnetic force is generated between the first magnetic body and the second magnetic body in the radial direction perpendicular to the shaft.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: October 10, 2017
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Jung Sam Kim, Jinkoo Lee, Hansoo Shim, JinKyu Ryu
  • Elevator Door Stopping Device
    Publication number: 20160009529
    Abstract: An elevator door stopping device which can prevent that elevator door is closed by itself when power supplied to a motor for opening and closing the elevator door is interrupted, an improvement of the elevator door stopping device characterized in that a first magnetic body is fixed on a shaft rotating in interlock with opening and closing of the elevator door so as to generate a magnetic force in a radial direction perpendicular to the shaft, and a second magnetic body is fixed on a fixed face spaced apart from the first magnetic body at a predetermined interval in the radial direction in such a manner that the second magnetic body has the opposite pole to the first magnetic body, so that a magnetic force is generated between the first magnetic body and the second magnetic body in the radial direction perpendicular to the shaft.
    Type: Application
    Filed: September 12, 2013
    Publication date: January 14, 2016
    Inventors: Jung Sam Kim, Jinkoo Lee, Hansoo Shim, JinKyu Ryu