Hydraulic chain mover

Claim 1

A MACHINE OF THE CHARACTER DESCRIBED, COMPRISING A PAIR OF SPACED, PARALLEL CYLINDERS, A PISTON IN EACH CYLINDER ADAPTED TO MOVE FORWARDLY AND TO BE RETRACTED, A YOKE JOINING THE FORWARD ENDS OF THE PISTON, HYDRAULIC MEANS FOR EXTENDING AND RETRACTING THE PISTONS, A FIRST TUBE SECURED TO AND EXTENDING FORWARDLY FROM THE MIDDLE OF THE YOKE, A SELF-CLOSING GATE HINGED TO EFFECTIVELY CLOSE THE FORWARD END OF SAID FIRST TUBE AND ADAPTED TO OPEN FORWARDLY ONLY, A SECOND TUBE POSITIONED BEHIND AND IN SPACED ALIGNMENT RELATIVE TO THE FIRST TUBE, A SELF-CLOSING GATE HINGED TO EFFECTIVELY CLOSE THE FORWARD END OF SAID SECOND TUBE AND ADAPTED TO OPEN FORWARDLY ONLY, A SINGLE CHAIN PASSING THROUGH SAID TUBES TO BE ATTACHED TO A LOAD, SAID CHAIN COMPRISING LINKS ADJACENT ONES OF WHICH ARE AT RIGHT ANGLES TO EACH OTHER, WHEREBY THE GATE OF SAID FIRST TUBE HOLDS THE CHAIN WHEN SAID PISTONS ARE EXTENDED AND THE GATE OF SAID SECOND TUBE HOLDS THE CHAIN WHEN THE PISTONS ARE RETRACTED.