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:
May. 26, 2026
Filed:
Nov. 09, 2023
Otis Elevator Company, Farmington, CT (US);
Heping Qiu, Shanghai, CN;
Tongqiu Liu, Shanghai, CN;
Ming Yin, Shanghai, CN;
Tingting Wang, Shanghai, CN;
Hongliang Tian, Shanghai, CN;
Guoping Pan, Shanghai, CN;
Baoxiang Cen, Shanghai, CN;
Longwen Wang, Shanghai, CN;
Lan Wang, Shanghai, CN;
OTIS ELEVATOR COMPANY, Farmington, CT (US);
Abstract
A device for detecting a function of a contactor, the contactor is configured to short three-phase phase lines of an elevator motor together by closing contacts, the device including: a voltage signal source coupled with the contactor; a voltage detection unit coupled with the three-phase phase lines of the elevator motor; a switching unit arranged between the contactor and the voltage signal source and between the voltage detection unit and the three-phase phase lines, in a detection mode, the switching unit is configured to conduct the voltage signal source to the contactor to provide a voltage detection signal to the three-phase phase lines via the contactor and to conduct the voltage detection unit to the three-phase phase lines, the voltage detection unit being configured to measure voltage of the three-phase phase lines and to output measurement to a control unit.