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:
Jun. 27, 2006
Filed:
Jun. 28, 2004
Holger Freitag, Bochum, DE;
Anton Münzebrock, Dortmund, DE;
Burkhard Hasenack, Hagen, DE;
Giuliano Persico, Wetter, DE;
Erik Appel, Wetter, DE;
Holger Freitag, Bochum, DE;
Anton Münzebrock, Dortmund, DE;
Burkhard Hasenack, Hagen, DE;
Giuliano Persico, Wetter, DE;
Erik Appel, Wetter, DE;
Demag Cranes & Components GmbH, Wetter, DE;
Abstract
The invention concerns a drive arrangement of a lifting gear and/or a traveling gear, with a pole-reversible rotary-current motor with windings for at least two different actuating speeds, with a pole switching element connecting the rotary-current motor to a voltage supply for changing between the actuating speeds of the rotary-current motor. In order to create a drive arrangement of a lifting gear and/or a traveling gear with a rotary-current motor, whose switching behavior is optimized in relation to the actuation of the rotary-current motor, it is proposed that a power switching element () be hooked up in front of the pole switching element (), and it can be separated from the voltage supply via the power switching element () for the pole switching process of the rotary-current motor ().