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. 28, 2007
Filed:
Feb. 15, 2005
Siegfried Seidler, Villingen-Schwenningen, DE;
Francisco Rojo Lulic, St. Georgen, DE;
Wolfgang Laufer, Aichhalden, DE;
Siegfried Seidler, Villingen-Schwenningen, DE;
Francisco Rojo Lulic, St. Georgen, DE;
Wolfgang Laufer, Aichhalden, DE;
ebm-papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
A motor structure resistant to liquid intrusion features two modules, the first having an electronically commutated external-rotor motor (), which motor comprises an internal stator () that is arranged on a bearing tube () and is separated by a first air gap () from an external rotor (), which latter comprises a rotor cup () that is open at one end and is joined at its other end to a shaft () that is journalled in the bearing tube (), further having a permanent-magnet arrangement (), arranged at the open end of the rotor cup (), for magnetic interaction with a second permanent-magnet rotor (), forming part of the second module. The first module is separated from that second rotor () by a second air gap and forms therewith a magnetic coupling (), so that a rotation of the permanent-magnet arrangement () brings about a rotation of that second rotor (). A hermetic separation of the two modules is accomplished using a non-ferromagnetic separating element () arranged in the second air gap. The second module can safely be used to handle liquid, e.g. as a pump.