US Patent 7832503 Downhole motor with a continuous conductive path

A downhole drilling motor comprising a housing and a shaft extending within the housing, wherein the shaft is movable relative to the housing. Further, a conducting path extends within the housing between a first axial position and a second axial position. The conducting path comprises a housing conductor associated with the housing and a shaft conductor associated with the shaft, wherein the shaft conductor is capable of a movement relative to the housing conductor. An assimilating connector is interposed between the housing conductor and the shaft conductor for conductively connecting the housing conductor with the shaft conductor and for assimilating the movement of the shaft conductor relative to the housing conductor. The assimilating connector includes one or more of a rotary movement assimilating connector, a longitudinal movement assimilating connector and a transverse movement assimilating connector.