US 12,246,948 B2
Method for moving an elevator car of an elevator in order to evacuate passengers, and brake opening device for moving an elevator car of an elevator
Steffen Bewersdorf, Unterägeri (CH)
Assigned to INVENTIO AG, Hergiswil (CH)
Appl. No. 17/757,894
Filed by Inventio AG, Hergiswil (CH)
PCT Filed Dec. 23, 2020, PCT No. PCT/EP2020/087819
§ 371(c)(1), (2) Date Jun. 23, 2022,
PCT Pub. No. WO2021/136738, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 19220186 (EP), filed on Dec. 31, 2019.
Prior Publication US 2023/0022982 A1, Jan. 26, 2023
Int. Cl. B66B 5/02 (2006.01)
CPC B66B 5/027 (2013.01) 15 Claims
OG exemplary drawing
 
1. A method for moving an elevator car of an elevator to evacuate passengers from the elevator car when a power failure occurs, wherein a brake blocks a vertical movement of the elevator car, the method comprising the steps of:
transmitting electrical power to the brake to release the brake and enable the vertical movement of the elevator car, the brake being adapted to move and be held in a plurality of positions ranging between a fully closed position and a fully open position according to the electrical power transmitted;
determining an actual speed at which the elevator car is moving;
comparing the determined actual speed with a predetermined target speed; and
continuously modulating the transmitted electrical power causing the brake to adjust to the positions between the fully closed position and the fully open position so that the determined actual speed reaches and maintains the target speed.