公开(公告)号：US20210277697A1

公开(公告)日：2021-09-09

申请号：US17193440

申请日：2021-03-05

申请人： Abloy Oy

发明人： Harri JUNTUNEN

IPC分类号： E05F3/10 ,  E05F3/12

摘要： A cam action door closer comprising a body, a spring, a speed control channel system and a latching control channel system, a closing control piston having a piston head and a circular side. The closing control piston has a cutting on the side of the closing control piston and on the piston head, the cutting forming a control edge at its end. The cutting has a length between the piston head and the control edge. The speed control channel system comprises a speed connecting channel, which is located in such a way that the control edge is arranged to close it.