US 12,325,611 B2
Lifting device for lifting a payload within an elevator shaft in a controllable manner
Gabriele Bizzozero, Gisikon (CH); and Stefan Weber, Niederwil (CH)
Assigned to INVENTIO AG, Hergiswil (CH)
Appl. No. 17/758,715
Filed by Inventio AG, Hergiswil (CH)
PCT Filed Jan. 20, 2021, PCT No. PCT/EP2021/051177
§ 371(c)(1), (2) Date Jul. 13, 2022,
PCT Pub. No. WO2021/148456, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 20152594 (EP), filed on Jan. 20, 2020.
Prior Publication US 2023/0042428 A1, Feb. 9, 2023
Int. Cl. B66C 15/02 (2006.01); B66B 9/00 (2006.01); B66B 19/00 (2006.01); B66C 25/00 (2006.01)
CPC B66C 15/02 (2013.01) [B66B 19/002 (2013.01); B66C 25/00 (2013.01); B66B 9/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An elevator system comprising:
an elevator car displaceable within a lower region in an elevator shaft; and
a lifting device arranged in the elevator shaft above the lower region for lifting a payload in a controllable manner, the lifting device comprising:
a platform adapted to be fixed in the elevator shaft;
a holding device adapted to be fixed to a payload;
a lifting cable attached to the holding device;
a pulling device secured to the platform;
a securing cable interacting with the holding device at a first coupling point and with the platform at a second coupling point;
a catching device;
a counterweight attached to the securing cable;
wherein the pulling device actively and controllably displaces the lifting cable relative to the platform;
wherein the lifting device displaces the securing cable relative to the catching device when there is a relative movement between the holding device and the platform such that the securing cable remains tensioned between the first coupling point and the second coupling point by the counterweight; and
wherein the catching device blocks a further relative movement between the securing cable and the catching device when the lifting cable fails.