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:
Apr. 13, 2021
Filed:
Apr. 01, 2020
Kone Corporation, Helsinki, FI;
Andreas Tautz, Helsinki, FI;
KONE CORPORATION, Helsinki, FI;
Abstract
A method for controlling a passenger conveyor, which passenger conveyor includes an endless band of conveying elements, the endless band including an inclined conveying section; a drive shaft arranged to drive the endless band of conveying elements when rotated; a motor for rotating the drive shaft; a first sensing arrangement for sensing a rotation speed of the motor; a brake activatable to act directly on the drive shaft or an element fixedly connected to it for stopping rotation of the drive shaft; and a control system. The method includes rotating the drive shaft with the motor; and sensing rotation speed of the motor with the first sensing arrangement. The passenger conveyor includes a second sensing arrangement for sensing rotation speed of the drive shaft, and the method includes sensing rotation speed of the drive shaft with the second sensing arrangement; detecting deviation between the rotation speed of the motor and the rotation speed of the drive shaft or a multifold thereof; and activating the brake for stopping rotation of the drive shaft if deviation, in particular deviation meeting predefined criteria, is detected between the rotation speed of the motor and the rotation speed of the drive shaft or a multifold thereof, wherein said multifold equals to the rotation speed of the drive shaft multiplied with a preset factor n, wherein n preferably equals to transmission ratio between the drive shaft and the motor. A passenger conveyor implementing the method is also disclosed.