Hydraulic machines of the barrel and swash plate type

Claim 1

A HYDRAULIC MACHINE WHICH COMPRISES, IN COMBINATION, A FIXED CASING, A BARREL JOURNALLED IN SAID CASING ABOUT A FIRST AXIS, SAID BARREL FORMING A PLURALITY OF FIRST CYLINDERS PARALLEL TO SAID AXIS AND DISTRIBUTED ABOUT IT, A PLURALITY OF FIRST PISTONS FITTING SLIDABLY IN SAID CYLINDERS, RESPECTIVELY, A CAM MOUNTED IN SAID CASING, SAID CAM BEING OF REVOLUTION ABOUT A SECOND AXIS INTERSECTING SAID FIRST AXIS, A SWASH MEMBER PIVOTALLY MOUNTED ON SAID CAM ABOUT SAID SECOND AXIS, A THRUST BEARING BETWEEN SAID SWASH MEMBER AND SAID CAM, COOPERATING GEAR MEANS CARRIED BY SAID BARREL AND SAID SWASH MEMBER FOR CAUSING THEM TO ROTATE ABOUT SAID FIRST ARM AND SAID SECOND AXIS, RESPECTIVELY, WITH THE SAME RESPECTIVE SPEEDS OF REVOLUTION, A PLURALITY OF LINKS EACH PROVIDED AT ONE END TO ONE OF SAID PISTONS AND AT THE OTHER END TO SAID SWASH MEMBER AT A POINT THEREOF LOCATED IN THE PLANE PASSING THROUGH SAID POINT INTERSECTION AND PERPENDICULAR TOP SAID SECOND AXIS, A FIXED VALVE MEMBER IN SAID CASING ADJACENT SAID BARREL AND PROVIDED WITH A SUCTION CHAMBER AND A DELIVERY CHAMBER, SAID VALVE MEMBER HAVING A SURFACE OF REVOLUTION ABOUT SAID FIRST AXIS AND SAID BARREL HAVING A SURFACE IDENTICAL TO SAID VALVE MEMBER SURFACE AND SLIDABLE THEREON, SAID CYLINDERS OPENING INTO SAID BARREL SURFACE, AND SAID VALVE MEMBER PROVIDED WITH PORTS OPENING INTO SAID VALVE MEMBER SURFACE AND COMMUNICATING WITH SAID SUCTION CHAMBER AND SAID DELIVERY CHAMBER, RESPECTIVELY, SAID SWASH MEMBER BEING PROVIDED WITH A PLURALITY OF SECOND CYLINDERS FORMED THEREIN PARALLEL TO SAID SECOND AXIS AND DISTRIBUTED ABOUT IT, A PLURALITY OF SECOND PISTONS FITTING SLIDABLY IN SAID SECOND CYLINDERS, RESPECTIVELY, A CIRCULAR TRACK FIXED WITH RESPECT TO SAID CAM AND COAXIAL THEREWITH, A MEMBER SWIVELLED TO EACH OF SAID SECOND PISTONS RESPECTIVELY AND BEARING SLIDABLY ON SAID TRACK, AND MEANS FOR SUPPLYING A FLUID UNDER PRESSURE INTO THE SPACES, BETWEEN SAID SECOND CYLINDERS AND THE RESPECTIVE SECOND PISTONS FITTING SLIDABLY THEREIN, LOCATED ON THE OTHER SIDES OF SAID SECOND PISTONS FROM SAID TRACK FOR AT LEAST THOSE OF SAID SECOND CYLINDERS THAT ARE NEAREST TO SAID BARREL, WHEREBY THE FORCES APPLIED ON SAID THRUST BEARING ARE REDUCED.