Hydraulically-operated sewer cleaning machine

Claim 1

IN A SEWER CLEANING MACHINE FOR SELECTIVELY FEEDING A CONTINUOUS ELONGATED SEWER ROD IN OPPOSITE DIRECTIONS TO AND FROM A SEWER PIPE OR THE LIKE, IN COMBINATION, A RODSTORAGE CAGE ADAPTED TO RECEIVE THE ROD IN A COILED CONDITION, HAVING A FORWARD FEED APERTURE FOR THE ROD, AND ROTATABLE ABOUT A HORIZONTAL AXIS PASSING THROUGH THE FEED APERTURE, A DUAL-INPUT DIFFERENTIAL TRACTION DRIVE UNIT POSITIONED FORWARDLY OF THE BASKET AND INCLUDING A PAIR OF COOPERATING OPPOSITELY ROTATABLE FEED WHEELS THE PERIPHERIES OF WHICH ARE ENGAGEABLE UNDER PRESSURE WITH THE ROD ON OPPOSITE SIDE THEREOF FOR IMPELLING THE ROD HORIZONTALLY AND AXIALLY TO AND FROM THE FEED APERTURE, SAID DRIVE UNIT BEING MOUNTED FOR SIDE-OVER-SIDE ROTATION BODILY ABOUT THE HORIZONTAL AXIS OF MOVEMENT OF THE ROD WHEREBY THE FEED WHEELS ARE CONSTRAINED TO REVOLVE IN ORBITAL FASHION ABOUT THE ROD, SAID FEED WHEELS CONSTITUTING THE DIFFERENTIAL OUTPUT OF SAID DRIVE UNIT, A CAGE MOTOR FOR EFFECTING ROTATION OF SAID CAGE, A FEED MOTOR FOR EFFECTING FORE-AND-AFT FEEDING MOVEMNTS OF THE SEWER ROD, SAID CAGE CONSTITUTING A FIRST DIFFERENTIAL INPUT FOR SAID DRIVE UNIT, A ROTATABLE ELEMENT CONSTITUTING THE SECOND DIFFERENTIAL INPUT FOR SAID DRIVE UNIT, A SECONDARY DUAL-INPUT DIFFERENTIAL UNIT INCLUDING FIRST AND SECOND DIFFERENTIAL INPUTS AND A DIFFERENTIAL OUTPUT, A FIRST POWER TRAIN OPERATIVELY CONNECTING SAID CAGE MOTOR AND CAGE, A SECOND POWER TRAIN OPERATIVELY CONNECTING SAID CAGE MOTOR AND