Rotating fluid cylinders

Claim 1

IN A ROTATING, DOUBLE ACTING FLUID CYLINDER CONSTRUCTION HAVING A ROTATABLE CYLINDER BARREL CLOSED BY AXIALLY SPACED HEADS, A PISTON WITHIN AND ROTATABLE WITH SAID BARREL AND RECIPROCABLE BETWEEN SAID HEADS, A PISTON ROD UNITARILY MOVABLE WITH SAID PISTON AND PROJECTING FROM ONE SIDE THEREOF AND OUTWARDLY OF SAID BARREL THROUGH ONE OF SAID HEADS, THE IMPROVEMENT COMPRISING A STATIONARY FLUID DISTRIBUTING CONSTRUCTION, INCLUDING A STATIONARY BODY HAVING AN OPENING ADAPTED TO RECEIVE FLUID UNDER PRESSURE FROM A SOURCE, CONCENTRIC INNER AND OUTER TUBES WITH AN ANNULAR SPACE THEREBETWEEN, BOTH TUBES HAVING INNER ENDS EXTENDING THROUGH AN OPENING IN THE OTHER OF SAID HEADS WHEREBY SAID ANNULAR SPACE ESTABLISHES COMMUNICATION BETWEEN A FLUID CONNECTION AT THE OUTER END OF SAID OUTER TUBE AND THE BARREL SPACE AT THE OPPOSITE SIDE OF SAID PISTON, SEAL AND BEARING MEANS BETWEEN SAID OUTER TUBE AND THE OPENING IN SAID OTHER HEAD TO PROVIDE FOR ROTATIONAL MOVEMENT OF SAID OTHER HEAD RELATIVE TO SAID OUTER TUBE WITHOUT FLUID LEAKAGE, THE OUTER END OF SAID INNER TUBE BEING CONNECTED TO SAID STATIONARY BODY IN FLUID TIGHT MANNER AND WITH ITS INTERIOR IN COMMUNICATION WITH THE OPENING IN SAID BODY, THE INNER END OF SAID INNER TUBE SLIDABLY FITTING WITHIN AN AXIAL OPENING IN SAID PISTON AND ESTABLISHING COMMUNICATION BETWEEN SAID BODY OPENING AND THE BARREL SPACE AT SAID ONE PISTON SIDE, AND THE OUTER TERMINAL END OF SAID OUTER TUBE BEING ABUTTED AGAINST AND HELD TO SAID STATIONARY BODY IN FLUID TIGHT MANNER TO SEAL THE OUTER END OF SAID ANNULAR SPACE.