Fluid pump

Claim 1

IN A FLUID PRESSURE ENERGY TRANSLATING DEVICE OF THE TYPE DESCRIBED, A HOUSING, A ROTATABLE BARREL DISPOSED IN THE HOUSING IN RADIALLY SPACED RELATION THERETO, A PLURALITY OF PISTONS SLIDABLY RECEIVED IN CYLINDERS IN THE BARREL FOR RECIPROCATION PARALLEL TO THE BARREL AXIS, ONE END OF EACH OF THE PISTONS PROJECTING FROM THE ADJACENT END OF THE BARREL, A CAM PLATE DISPOSED ADJACENT ONE END OF THE BARREL AND MOUNTED ON THE HOUSING FOR INCLINATION ABOUT AN AXIS AT RIGHT ANGLES TO THE BARREL AXIS, SPHERICAL BALL AND SOCKET JOINTS BETWEEN THE PROJECTING ENDS OF THE PISTONS AND SAID CAM PLATE TO PROVIDE FOR RECIPROCATION OF THE PISTONS IN SAID CYLINDERS RELATIVE TO THE BARREL IN RESPONSE TO ROTATION OF THE BARREL RELATIVE TO THE CAM PLATE, SAID JOINTS INCLUDING SHOES ENGAGING SAID CAM PLATE, A VALVE PLATE ENGAGING THE OPPOSITE END OF THE BARREL FOR CONTROLLING THE FLOW OF FLUID INTO AND OUT OF SAID CYLINDERS, A COAXIAL CYLINDRICAL SLEEVE-LIKE EXTENSION ON SAID ONE END OF THE BARREL, A DRIVE SHAFT FOR THE BARREL EXTENDING COAXIALLY THROUGH THE BARREL AND SAID SLEEVE-LIKE EXTENSION AND ROTATABLY SUPPORTED BY AXIALLY SPACED BEARINGS CARRIED BY SAID HOUSING, A COAXIAL ANNULAR LAND INTERMEDIATE THE