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:
Aug. 11, 2026
Filed:
Oct. 13, 2022
Otis Elevator Company, Farmington, CT (US);
Guosong Li, Tianjin, CN;
OTIS ELEVATOR COMPANY, Farmington, CT (US);
Abstract
A self-checking device and method for an elevator braking device and an elevator system. The self-checking device includes an inductance testing module configured to measure an electromagnetic brake coil inductance L of the braking device; and a processing module electrically connected to the inductance testing module, and storing a mathematical model of an air gap a between the movable plate and the static plate with respect to the brake coil inductance L in a brake state; the processing module is configured to execute a checking mode in the brake state of the braking device, and in the checking mode, the processing module receives a current inductance Lmeasured by the inductance testing module, calculates a current air gap abased on the mathematical model stored, and determines a wear degree of the friction lining based on the current air gap acalculated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile