Patent ID: 7821173

Claim:
A bell-armature coil for an electric motor, the bell-armature coil comprising: a hollow, self supporting cylindrical coil winding forming a coil opening at one end and which has a skewed winding defining a cylindrical wall of the coil winding that is wound from a winding wire forming a continuous winding; and a coil former plate including a printed circuit board, the coil former plate inserted into the coil opening, wherein the coil winding has conductor ends which are connected to the printed circuit board, the coil former plate forms a winding aid that includes winding projections arranged on a circumference of the printed circuit board, the winding wire is wound around each of the winding projections so as to form the coil winding without extending across the printed circuit board, and wherein the bell-armature coil forms an active part of a rotor of the electric motor.