Pierburg Ag

Reinhard Thienelt

Ronald Rathke

Frank Schwabbauer

A wet-running direct-current motor for a fuel pump having a commutator ( ) formed from carbon lamellas ( ), and carbon brushes ( ) having brush running faces ( ) which are fluted in the direction of rotation. The fluting is obtained by curved, parallel ribs of triangular cross-sections whose apexes define the brush running face. The curved ribs have radii offset from the curvature of the commutator surface, the offset being achieved by offset of the center of the radius of each rib in a direction counter to the direction of relative rotation of the commutator and brushes. The motor is rendered usable for fuel pumps of diesel engines.

Growing community of inventors

Willich, Germany

Reinhard Thienelt