Concealed door closer

US9145726B2 · kind B2 · utility

Assignee

• Oubao Security Technology Co., Ltd. · CN

Inventors

• Haojie Li · 东风镇, CN
• Zhenfeng Fu · Lishui, CN
• Guowei Jiang · Jiangmen, CN
• Zhenbo Wu · Lishui, CN
• Hongbo Liu · Jilin, CN
• Weibin Lan · Lishui, CN
• Chenxi Zhu · Fairfax, US
• Jun Zhang · Longbeilingcun, CN
• Maochen Zhang · Lishui, CN

Key dates

• Filing date: Mar 13, 2014
• Grant date: Sep 29, 2015
• Expiry date: Mar 13, 2034

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E05Y2201/636
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A concealed door closer includes a housing, an input shaft and an output shaft, the input shaft being connected to a motor, wherein a joining member is arranged between the input shaft and the output shaft, and two ends of the joining member are respectively provided with an upper connection piece and a lower connection piece, which are connected to a roller via vertical rotation shaft, and wherein both the input shaft and the output shaft are provided with a left connection piece and a right connection piece, which are horizontally connected to the roller via a horizontal rotation shaft. The components in the door closer have a simple structure and may be easily processed and assembled. The size of the joint after assembly is equivalent to that of the joining member, so the overall size is small.