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:
Sep. 09, 2008
Filed:
Aug. 24, 2004
Holger Freitag, Bochum, DE;
Oliver Moll, Solingen, DE;
Erik Appel, Wetter, DE;
Ralf Eising, Herne, DE;
Udo Gersemsky, Herdecke, DE;
Burkhard Hasenack, Hagen, DE;
Anton Münzebrock, Dortmund, DE;
Giuliano Persico, Wetter, DE;
Holger Freitag, Bochum, DE;
Oliver Moll, Solingen, DE;
Erik Appel, Wetter, DE;
Ralf Eising, Herne, DE;
Udo Gersemsky, Herdecke, DE;
Burkhard Hasenack, Hagen, DE;
Anton Münzebrock, Dortmund, DE;
Giuliano Persico, Wetter, DE;
Demag Cranes & Components GmbH, Wetter, DE;
Abstract
A method for monitoring a chain pulley block and a chain pulley block apparatus with an electric actuator motor () that is connected at the drive side to a transmission () across a sliding clutch (). In order to achieve a safe operation of the chain pulley block, the speed of the transmission () is determined via a sensor (), the determined speed of the transmission () is compared in a control device () to the operating speed of the actuator motor () as determined from rated duty of the actuator motor () and if a deviation is found between the speed of the transmission () and the operating speed, allowing for tolerances and any transmission ratio of the transmission (), the actuator motor () is switched off.