公开(公告)号：US20230184017A1

公开(公告)日：2023-06-15

申请号：US18164565

申请日：2023-02-03

Applicant: NINGBO PENTAGON DAMPER CORPORATION

Inventor： Mingliang LAI ,  Feifei ZHANG ,  Jing ZHANG

IPC: E05F3/10 ,  E05F1/12 ,  E05F3/20

CPC classification number: E05F3/10 ,  E05F1/1253 ,  E05F3/20 ,  E05Y2201/21 ,  E05Y2201/254 ,  E05Y2201/264 ,  E05Y2201/474 ,  E05Y2201/628 ,  E05Y2201/638 ,  E05Y2600/46 ,  E05Y2800/404 ,  E05Y2900/132

Abstract: A door closer is provided. The door closer includes a first connecting plate and a second connecting plate. The first connecting plate is connectable to an external door frame, the second connecting plate is connectable to a door body connecting portion. Connecting rod assemblies and return springs are mounted in the door body connecting portion. One end of the connecting rod assembly passes through the second connecting plate and is hinged to the first connecting plate. When a door is opened, an external door body drives the first connecting plate and the second connecting plate to overturn, and after the connecting rod assembly pulls the door body connecting portion, the return spring is compressed. When the door is closed, the return spring pulls the door body to close automatically.