Patent ID: 11952241
Assignee: OTIS ELEVATOR COMPANY
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. 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
at least one operation-mode display, wherein the operation-mode display is arranged to display an indication of an elevator mode of operation, wherein the mode of operation corresponds to a variation in the mass of the elevator counterweight.