Hydraulic motor

Claim 1

A HYDRAULIC MOTOR COMPRISING A HOUSING, A REACTION MEMBER JOURNALED IN SAID HOUSING FOR ROTATION ABOUT A FIRST AXIS, A VALVE PLATE IN SAID HOUSING HAVING A VALVING SURFACE DISPOSED ABOUT A SECOND AXIS A CYLINDER BLOCK IN SAID HOUSING HAVING A PORTING SURFACE SEATED AGAINST SAID VALVHOUSING HAVING A PORTING SURFACE SEATED AGAINST SAID VALVE ING SURFACE, CYLINDER BORES IN SAID CYLINDER BLOCK SUBSTANTIALLY PARALLEL TO SAID SECOND AXIS, PISTONS WITHIN EACH SAID CYLINDER BORES, CONNECTING ROD MEANS BETWEEN SAID PISTONS AND SAID REACTION MEMBER, MEANS URGING SAID CYLINDER BLOCK INTO SEALING ENGAGEMENT WITH SAID VALVING SURFACE, A DRIVE MEMBER JOURNALED FOR ROTATION ABOUT SAID SECOND AXIS AND DRIVINGLY CONNECTED TO SAID REACTION MEMBER FOR ROTATION THEREWITH, AND DRIVING CONNECTION MEANS BETWEEN SAID CYLINDER BLOCK AND SAID DRIVE MEMBER TO ROTATE SAID CYLINDER BLOCK SYNCHRONOUSLY WITH THE ROTATION OF SAID REACTION MEMBER, AND DRIVING CONNECTION MEANS BEING CONSTRUCTED AND ARRANGED TO PERMIT SAID CYLINDER BLOCK TO TILT AND TO RADIALLY LOCATE SAID CLYINDER BLOCK WITH RESPECT TO SAID DRIVE AND SAID VALVE PLATE TO MAINTAIN SEALING CONTACT BETWEEN SAID PORTING SURFACE AND SAID VALVING SURFACE, THE ENGAGEMENT OF SAID VALVING SURFACE AND SAID POURING SURFACE PROVIDING THE SOLE GUIDING SURFACE PREVENTING TILTING OF SAID CYLINDER BLOCK WITH RESPECT TO SAID VALVING SURFACE.