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:
Jul. 05, 2016
Filed:
Nov. 09, 2011
Holger Freitag, Bochum, DE;
Giorgio Maccioni, Witten, DE;
Giuliano Persico, Wetter, DE;
Terex MHPS IP Management GmbH, Duesseldorf, DE;
Abstract
The invention relates to a circuit arrangement comprising a hoist controller () of a hoist (), a control pendant () having an emergency stop switch (), and a control line () which electrically connects the hoist controller () to the control pendant () and has a control voltage applied thereto. In order to provide a circuit arrangement for monitoring an emergency stop switch of a hoist having a pendant switch, which circuit arrangement can be used to reliably detect a short circuit, it is proposed to assign a controller () to the emergency stop switch (), which controller superimposes a cyclical pulse on the control voltage, and to design the hoist controller () in such a manner that said hoist controller monitors the cyclical pulse and switches the hoist () to a safe state in the absence of the cyclical pulse.