US 12,246,947 B2
Method for safeguarding the car of an elevator
Marcial Lendi, Näfels (CH); and Martin Hardegger, Sargans (CH)
Assigned to CEDES AG, Landquart (CH)
Filed by Cedes AG, Landquart (CH)
Filed on May 29, 2020, as Appl. No. 16/887,495.
Claims priority of application No. 19177694 (EP), filed on May 31, 2019.
Prior Publication US 2020/0377334 A1, Dec. 3, 2020
Int. Cl. B66B 5/00 (2006.01); B66B 1/32 (2006.01); B66B 1/34 (2006.01); B66B 3/00 (2006.01); B66B 5/02 (2006.01)
CPC B66B 5/0031 (2013.01) [B66B 1/32 (2013.01); B66B 1/3492 (2013.01); B66B 3/002 (2013.01); B66B 5/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for safeguarding a car of an elevator, which is forms regular unlocking zones in a region around predetermined stopping points at floors of a building to prevent unintended movement, the method comprising the steps of:
monitoring a speed of the car, a height position of the car in an elevator shaft, and a locking status of a car door; and
identifying whether the car is stopping, a height position outside the regular unlocking zone, and an unlocked state of the car door, and having a first sub-method, wherein in the event that the car stops at a position outside of the regular unlocking zone with the car door in the unlocked state, a temporary unlocking zone is formed having an upper boundary and a lower boundary above and below the position where the car stops.