公开(公告)号：US20170362055A1

公开(公告)日：2017-12-21

申请号：US15609496

申请日：2017-05-31

申请人： Ari KATTAINEN ,  Juha-Matti AITAMURTO ,  Claus INGMAN ,  Ferenc STAENGLER ,  Gergely HUSZAK ,  Tuomas NYLUND

发明人： Ari KATTAINEN ,  Juha-Matti AITAMURTO ,  Claus INGMAN ,  Ferenc STAENGLER ,  Gergely HUSZAK ,  Tuomas NYLUND

IPC分类号： B66B5/00 ,  B66B1/28 ,  B66B5/02 ,  B66B9/00

CPC分类号： B66B5/0031 ,  B66B1/28 ,  B66B5/02 ,  B66B9/00 ,  B66B13/22

摘要： In modern elevators, safety circuits are used for preventing the operation of an elevator having possibly safety related problems. Sometimes the problem is in the safety circuit itself, and the operation could be continued. In a disclosed arrangement, groups of at least two independent safety circuits are used. The operation of the elevator can be continued in the case where one safety circuit in each group indicates that there is a possible problem. Thus, one deficient safety switch in one safety circuit does not prevent the operation.