Pumps

Claim 1

A MOTOR SECTION FOR USE IN A FLUID OPERATED PUMP, COMPRISING: A HOUSING, A MOTOR CYLINDER HAVING AN OVATE AXIAL BORE DISPOSED IN SAID HOUSING; CYLINDRICAL SUPPORTING SLEEVES IN SAID HOUSING AT OPPOSITE ENDS OF SAID MOTOR CYLINDER AND HAVING REDUCED BORES AXIALLY ALIGNED WITH THE BORE OF SAID MOTOR CYLINDER; AN ELONGATE MOTOR ROTOR SECTION ROTATABLY MOUNTED IN SAID HOUSING AND HAVING AXIALLY ALIGNED SUPPORTING SHAFTS AT ITS ENDS DISPOSED IN THE REDUCED BORES OF SAID SUPPORTING SLEEVES AND AN ENLARGED CYLINDRICAL CENTRAL HUB DISPOSED IN SAID OVATE BORE OF SAID MOTOR CYLINDER; A PLURALITY OF LONGITUDINALLY EXTENDING RADIALLY MOVABLE VANES DISPOSED IN CIRCUMFERENTIALLY SPACED LONGITUDINALLY EXTENDING SLOTS FORMED IN SAID HUB AND SAID SHAFTS OF SAID MOTOR ROTOR SECTION, SAID VANES BEING CONFINED IN SAID OVATE BORE OF SAID MOTOR CYLINDER BY SAID SUPPORTING SLEEVES AND MOVABLE IN SEALING ENGAGEMENT WITH THE OVATE BORE OF SAID MOTOR CYLINDER, SAID OVATE BORE PROVIDING AT LEAST A PAIR OF LOBE ENLARGEMENTS IN SAID BORE WHICH SAID VANES SLIDABLY SEALINGLY ENGAGE; INLET PORT MEANS FOR POWER FLUID FROM THE EXTERIOR OF SAID MOTOR SECTION TO ONE SIDE OF EACH LOBE OF SAID OVATE BORE OF SAID MOTOR CYLINDER; OUTLET PORT MEANS FROM THE OPPOSITE SIDE OF EACH OF SAID LOBES OF SAID BORE OF SAID MOTOR CYLINDER TO THE EXTERIOR OF SAID MOTOR HOUSING; SAID VANES SEPARATING FLUID FLOWING THROUGH SAID INLET PORT MEANS TO SAID LOBES FROM FLUID FLOWING THROUGH SAID OUTLET PORT MEANS FROM SAID LOBES OF SAID MOTOR SECTION; FLOW PASSAGES IN SAID SUPPORTING SLEEVES SEPARATELY COMMUNICATING THE INLET PORT MEANS AND THE OUTLET PORT MEANS OF SAID MOTOR CYLINDER WITH THE PORTIONS OF THE SLOTS IN THE SHAFTS OF SAID ROTOR SECTION FOR CONDUCTING FLUID PRESSURE FROM THE INLET PORT MEANS TO THE ENDS AND INNER EDGES OF THE VANES IN SAID SLOTS IN SAID HUB OF SAID MOTOR SECTION AND FOR CONDUCTING FLUID PRESSURE FROM THE OUTLET PORT MEANS TO THE ENDS AND INNER EDGES OF THE VANES IN SAID SLOTS FOR EQUALIZING THE PRESSURES APPLIED TO THE ENDS AND INNER EDGES OF SAID VANES BY THE FLUIDS PASSING THROUGH THE LOBES OF THE MOTOR CYLINDER.