Electrical generator or motor structure – Dynamoelectric – Reciprocating
Reexamination Certificate
2007-04-10
2007-04-10
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Reciprocating
C310S030000, C310S034000
Reexamination Certificate
active
10541230
ABSTRACT:
An electromagnetic drive device comprises a drive part (10) arranged to be reciprocated in the stroke direction (H) and possessing a circular or oval cross section, said drive part having a permanent magnet arrangement magnetized athwart the stroke direction (H), such arrangement possessing at least one pair of oppositely magnetized magnet portions (11through14) arranged sequentially in the stroke direction and being arranged in the intermediate space of a yoke arrangement (16) with pole pieces (19through22) provided in the direction of magnetization on opposite sides of the drive part (10). The yoke arrangement (16) possesses two pairs of pole pieces (19through22) delimiting the intermediate space and which are joined together by two yoke regions (23and24) extending essentially in parallelism to the stroke direction (H). At least one of the yoke regions (23and24) is surrounded by a coil (25and26) able to conduct current for performing a stroke. Each pair of pole pieces (19and21and respectively22and22) is provided with a pair of oppositely magnetized magnet portions (11, 12; 32, 33and, respectively,13, 14; 34, 35) of the permanent magnet arrangement. This means that it is simple to design for an extremely narrow overall size.
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Gerhartz Jürgen
Schwenzer Reinhard
Festo AG & Co.
Hoffman & Baron LLP
Scheuermann David W.
Schuberg Darren
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