The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
Feb. 04, 2021
Otis Elevator Company, Farmington, CT (US);
Zhenhong Li, New Britain, CT (US);
Ben Guo, West Hartford, CT (US);
OTIS ELEVATOR COMPANY, Farmington, CT (US);
Abstract
An illustrative example embodiment of an elevator control system includes a drive configured to control power provided to an elevator machine, a machine power switch module configured to selectively disconnect power from the elevator machine, and a brake power switch module configured to selectively disconnect power from a brake associated with the elevator machine. A monitor module includes a first monitor unit and a second monitor unit. Each monitor unit is configured to monitor a condition of the machine power switch module and the brake power switch module. The monitor units each provide an output to the other monitor unit including a current condition of the machine power switch module and a current condition of the brake power switch module as detected by that monitoring unit. Each of the monitor units is configured to determine whether there is correspondence between the outputs.