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. 17, 2010
Filed:
Apr. 14, 2006
Rudolf Eckenstein, Baar, CH;
Carlos Latorre Marcuz, Shanghai, CN;
Eric Birrer, Luzern, CH;
Karsten Gensicke, Buchrain, CH;
Rudolf Eckenstein, Baar, CH;
Carlos Latorre Marcuz, Shanghai, CN;
Eric Birrer, Luzern, CH;
Karsten Gensicke, Buchrain, CH;
Inventio AG, Hergiswil NW, CH;
Abstract
A method and detection system monitors the speed of an elevator car and, in case of excess speed caused by brake failure of a motor brake or shaft fracture of a drive pulley shaft, a safety circuit is opened and the detection system is transferred from a normal operational state (State) to a retardation state (State) in which it is monitored whether the elevator car is retarded after defined speed presets. After a successful retardation, the detection system is transferred to a state of standstill monitoring (State) in which it is monitored whether the elevator car leaves its standstill position. If the presets of Stateor Stateare not fulfilled, the detection system is transferred to a braking state of the brake (State) in which a brake which fixes the elevator car is activated.