ALEXANDRIA, Va., March 12 -- United States Patent no. 12,246,947, issued on March 11, was assigned to CEDES AG (Landquart, Switzerland).
"Method for safeguarding the car of an elevator" was invented by Marcial Lendi (Nafels, Switzerland) and Martin Hardegger (Sargans, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The method according to the invention is a method for safeguarding the car of an elevator, which is provided to form regular unlocking zones in the region around the envisaged stopping points at the stories, against unintended movement. The method monitors the speed of the car, the height position of the car in the elevator shaft and the status of the locking of the car door, and identi...