US Patent Issued to Otis Elevator on Feb. 10 for "Self-checking device and method for elevator braking device and elevator system" (Chinese Inventors)

ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,545,552, issued on Feb. 10, was assigned to Otis Elevator Co. (Farmington, Conn.).

"Self-checking device and method for elevator braking device and elevator system" was invented by Guosong Li (Tianjin, China) and Hua Zhou (Tianjin, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A self-checking device and a self-checking method for an elevator brake device, as well as an elevator system. The self-checking device includes: a controller, which controls a voltage applied to an electromagnetic coil of the elevator brake device, and which is configured to: enable an elevator to enter a test mode; gradually increase the voltage applied to the electromagn...