Hydraulic pumps

Claim 1

A HYDRAULIC PUMP COMPRISING AN ANNULAR CONTAINER FORMING A COLLECTION CHAMBER OF U-SHAPED CROSS-SECTION ROTATABLE ON A SHAFT AND ADAPTED TO RETAIN A QUANTITY OF COLLECTED LIQUID AT ITS OUTER PERIPHERY BY CENTRIFUGAL FORCE, MEANS FOR ROTATING SAID CONTAINER AT A HIGH SPEED TO IMPART A HIGH TANGENTIAL VELOCITY TO LIQUID INJECTED THEREIN, AT LEAST ONE LIQUID INLET PIPE MOUNTED ROTATABLY WITH SAID SHAFT AND EXTENDING RADIALLY INTO SAID CONTAINER, SAID MEANS ROTATING SAID INLET PIPE IN THE SAME DIRECTION AS THAT OF THE CONTAINER, SAID INLET PIPE TERMINATING IN AN INJECTION NOZZLE DISPOSED SUBSTANTIALLY TANGENTIALLY WITH RESPECT TO SAID OUTER PERIPHERY AND FACING IN ITS DIRECTION OF ROTATION, AT LEAST ONE FIXED LIQUID OUTLET PIPE EXTENDING RADIALLY INTO SAID CONTAINER TO A POINT NEAR ITS OUTER PERIPHERY SO AS TO SCOOP COLLECTED LIQUID THEREFROM, SAID CONTAINER BEING ROTATED AT A SPEED SUBSTANTIALLY HIGHER THAN THE SPEED OF THE INLET PIPE, WHEREBY HIGH PUMPING PRESSURES ARE CREATED, AND MEANS FOR MAINTAINING THE QUANTITY OF LIQUID RETAINED IN THE CONTAINER BETWEEN MAXIMUM AND MINIMUM LIMITS.