Immersion type electro-motor for fuel supply

摘要

The motor includes a commutator brush which comprises a brush body formed through sintering so that it comprises an insertion hole. A connection clamp comprises an end section which is inserted in the insertion hole. A metal powder, pref. copper powder, is arranged in the insertion hole to firmly hold connecting wires in the hole. A surface of the metal powder is covered with a conductive material, which does not react with sulphur. The conductive material consists pref. of tin, gold, nickel, zinc or their respective alloys.