Inventor
CHENG LIFEI
CN5 patents
Patents
5 patentsUS11764716B1Sep 19, 2023
Determination of operation mode for AC asynchronous three-phrase motor in escalator system
OTIS ELEVATOR CO0 citations57
US11078050B2Aug 3, 2021
Speed detection device and passenger conveyer device
OTIS ELEVATOR CO0 citations57
US12122640B2Oct 22, 2024
Heating control device and method for escalator system or moving sidewalk system
OTIS ELEVATOR CO0 citations54
US10865074B2Dec 15, 2020
Handrail automatically tensioning system and a method for adjusting tension level of handrail
OTIS ELEVATOR CO0 citations48
US11993486B2May 28, 2024
Apparatus and method for controlling passenger transportation device
OTIS ELEVATOR CO0 citations46