Patent ID: 7365469

Claim:
An armature packet ( 1 ) for an electric motor, comprising: a plurality of armature laminations ( 2 , 3 , 3 ′), wherein in each of said armature laminations ( 2 , 3 , 3 ′), a plurality of winding slots ( 4 ) for receiving an armature winding ( 5 ) is provided, wherein the winding slots ( 4 ) of adjacent armature laminations ( 2 , 3 , 3 ′) are located in alignment with one another and form a conduit ( 6 ), wherein the winding slots ( 4 ), associated with one conduit ( 6 ), of different armature laminations ( 2 , 3 , 3 ′) have different geometries, wherein each winding slot ( 4 ) has two undercuts ( 16 ), and wherein the winding slots ( 4 ) of a first armature lamination ( 2 ) of two adjacent laminations ( 2 , 3 , 3 ′) has a smaller cross section and a smaller constriction ( 15 ) than a second armature lamination ( 3 ) of said two adjacent laminations ( 2 , 3 , 3 ′).