US 11,952,241 B2
Elevator counterweight
Hugues Leger, Saint Alban de Roche (FR); and Franck J. Det, Gien (FR)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed by Otis Elevator Company, Farmington, CT (US)
Filed on Oct. 18, 2022, as Appl. No. 17/968,183.
Claims priority of application No. 22305094 (EP), filed on Jan. 28, 2022.
Prior Publication US 2023/0242378 A1, Aug. 3, 2023
Int. Cl. B66B 17/12 (2006.01); B66B 1/28 (2006.01); B66B 1/34 (2006.01); B66B 11/00 (2006.01); B66B 5/00 (2006.01)
CPC B66B 17/12 (2013.01) [B66B 1/28 (2013.01); B66B 1/3476 (2013.01); B66B 11/006 (2013.01); B66B 5/0006 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An elevator system, comprising:
an elevator car;
an elevator counterweight including a first part configured to be connected, in use, to a suspension member of an elevator system, wherein the first part is arranged to receive an additional mass when the first part is connected to the suspension member, such that a mass of the elevator counterweight can be varied;
a mass variation system, wherein the mass variation system is arranged to add additional mass to the first part and/or remove additional mass from the first part, so that a mass of the elevator counterweight can be varied;
a controller, wherein the controller is arranged to control the mass variation system to add or remove the additional mass from the first part of the elevator counterweight; and
a dynamic display, wherein the dynamic display is arranged to display a current duty load, wherein the current duty load varies in correspondence with variation in the mass of the elevator counterweight.