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:
Nov. 17, 2009
Filed:
Dec. 19, 2008
Method and system for detecting and stopping uncontrolled movement of an elevator car in an elevator
Tatu Mattila, Helsinki, FI;
Seppo Ketoviita, Hyvinkää, FI;
Timo Syrman, Hyvinkää, FI;
Kone Corporation, Helsinki, FI;
Abstract
Method and system for detecting and stopping uncontrolled movement of the car () in an elevator. In the method movement of the car is detected with the first movement detection means () when the brake () of the drive machinery () is in the braking status with the purpose of holding the car in its position without moving. A first control signal is formed if the car moves in the aforementioned situation. Movement of the car is stopped on the basis of the first control signal with a separate stopping appliance () with respect to the brake of the drive machinery. The operating condition of the first movement detection means are tested with the second movement detection means () during driving of the car in order to detect a fault situation. A second control signal is formed for the elevator control when a fault situation is detected, in which case the elevator control drives the car to the next stopping floor and prevents the subsequent run of the car.