Abstract: An electric motor has a tubular housing part, permanent magnets arranged inside the housing part, a rotatable motor armature with a collector having a running surface, a plurality of sliding brushes having sliding surfaces abutting against the running surface of the collector, and an element for loading the motor armature in direction of its rotary axis toward the sliding brushes so that the running surface of the collector which in its projection is formed as an annular surface abuts against the sliding surfaces of the sliding brushes.

Abstract: The apparatus for feeding fuel to a motor vehicle engine from a fuel tank includes a pump portion and a direct current drive motor located in a housing part and through which the fuel flows. The commutator device of the drive motor includes commutator brushes located on the positive side and on the negative side; brush contact springs made from electrically conductive material located on the positive side and on the negative side, and a collector having a sliding surface for the brushes which are pressed on it during operation by the contact springs. To improve reliability of operation of the apparatus a negative potential is applied to the brush contact springs on the positive side and on the negative side and the brush contact springs on the positive side are electrically insulated from the commutator brushes on the positive side.

Abstract: In a device for supplying fuel from a supply tank to an internal combustion engine of a motor vehicle, which comprises a fuel supply aggregate having a suction opening and at least one pump stage, a degassing passage which connects a pump chamber of the pump stage to the supply tank opens into an upwardly extending and upwardly open channel which is formed between a cup-shaped element and a housing portion of the aggregate so as to separate steam bubbles from fuel.