Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2007-08-28
2007-08-28
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S091000, C310S104000, C310S112000, C310S114000, C417S420000, C417S423110, C417S423120
Reexamination Certificate
active
10580143
ABSTRACT:
A motor structure resistant to liquid intrusion features two modules, the first having an electronically commutated external-rotor motor (20), which motor comprises an internal stator (22) that is arranged on a bearing tube (30) and is separated by a first air gap (24) from an external rotor (26; 92), which latter comprises a rotor cup (40) that is open at one end and is joined at its other end to a shaft (46) that is journalled in the bearing tube (30), further having a permanent-magnet arrangement (76), arranged at the open end of the rotor cup (40), for magnetic interaction with a second permanent-magnet rotor (92), forming part of the second module. The first module is separated from that second rotor (92) by a second air gap and forms therewith a magnetic coupling (94), so that a rotation of the permanent-magnet arrangement (76) brings about a rotation of that second rotor (92). A hermetic separation of the two modules is accomplished using a non-ferromagnetic separating element (82) arranged in the second air gap. The second module can safely be used to handle liquid, e.g. as a pump.
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Gebr. Reinfurt GmbH & Co. KG, “Small and Miniature Ball Bearings” catalog, Wurzburg, Germany 2006, re GRW bearings mentioned in present specification.
Laufer Wolfgang
Rojo Lulic Francisco
Seidler Siegfried
ebm-papst St. Georgen GmbH & Co. KG
Nguyen Tran
Oliver, Esq. Milton
Ware Fressola Van Der Sluys & Adolphson LLC
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