Hydraulic fluid energy translating device

Claim 1

A HYDRAULIC FLUID PRESSURE ENERGY TRANSLATING DEVICE COMPRISING, A ROTATABLE BODY HAVING A PLURALITY OF CYLINDER BORES WITHIN EACH ONE OF WHICH A CYLINDRICAL PISTON IS ROTATABLE AND RECIPROCABLE; A CYLINDRICAL PISTON MOUNTED WITHIN EACH OF SAID CYLINDER BORES; A FORCE TRANSMITTING SHOE ENGAGEABLE WITH ONE END OF EACH OF SAID PISTONS; A PLATE-LIKE CAM MEANS FOR IMPARTING RECIPROCATING MOTION TO EACH OF SAID PISTONS WITHIN ITS BORE THROUGH SAID SHOES; MEANS ON EACH OF SAID PISTONS FORMING A PAIR OF AXIALLY SPACED HYDROSTATIC BALANCE PADS IN OPPOSITE SIDES THEREOF OPERABLE BETWEEN EACH OF SAID PISTONS AND ITS BORE TO COUNTERBALANCE LATERAL FORCE IMPARTED TO SAID PISTON BY SAID PLATE-LIKE CAM MEANS; AND A KNUCKLE JOINT BETWEEN EACH OF SAID SHOES AND PISTONS OPERABLE TO PERMIT ROTATION OF SAID PISTON IN ITS BORE WHILE SIMULTANEOUSLY PREVENTING ROTATION OF SAID PISTON ABOUT ITS OWN AXIS TO MAINTAIN SAID AXIALLY SPACED HYDROSTATIC BALANCE PAD MEANS ORIENTED COUNTER TO THE LATERAL FORCE IMPARTED TO SAID PISTON BY SAID CAM MEANS.