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:
Oct. 21, 2008
Filed:
Jan. 27, 2005
Volker Heinzer, Bochum, DE;
Olav Hennemann, Munster, DE;
Volker Heinzer, Bochum, DE;
Olav Hennemann, Munster, DE;
K.A. Schmersal Holding KG, Wuppertal, DE;
Abstract
A safety monitoring device is provided for a lift car which can be moved in a lift shaft by a traction drive via a lift control system and whose instantaneous position can be registered by a position registering device which supplies two position signals, produced independently of each other, in a predetermined time pattern, having two-channel evaluation of the position signals by means of a microprocessor in each case for location-dependent, instantaneous determination of the speed of the lift car and for comparison with a predefined movement profile, it being possible for a trigger signal that can be output via a safety relay stage to be generated if a predetermined instantaneous speed desired value is exceeded.