Rotary fluid motor

Claim 1

A ROTARY FLUID MOTOR COMPRISING A CASING HAVING A SMOOTH ARCUATE INTERNAL SURFACE CONTOURED SYMMETRICALLY WITH RESPECT TO AN AXIS AND OPPOSING INTERNAL SIDE SURFACES FORMED SYMMETRICALLY WITH RESPECT TO THE SAME AXIS, SAID SIDE SURFACES CLOSING OPPOSITE ENDS OF SAID ARCUATE SURFACE TO FORM A CHAMBER, A SHAFT JOURNALED FOR COAXIAL ROTATION WITH THE AXIS AND WITH RESPECT TO SAID CHAMBER, A BODY IN SAID CHAMBER MOUNTED ON SAID SHAFT FOR ROTATION RELATIVE SAID CASING, SAID BODY HAVING SIDE SURFACES IN NONCONTACTING FLUID-SEALING RELATION TO THE INTERIOR SURFACES OF SAID CASING CHAMBER, SAID BODY HAVING A PERIPHERAL SURFACE EXTENDING BETWEEN SAID SIDE SURFACES, SAID PERIPHERAL SURFACE BEING FORMED WITH A PLURALITY OF LOBES UNIFORMLY SPACED THEREAROUND, SAID LOBES HAVING OUTER EXTTREMITIES ADAPTED FOR NONCONTACTING FLUID-SEALING RELATION TO SAID ARCUATE SURFACE, SAID CASING BEING FORMED WITH A PLURALITY OF RADIALLY EXTENDING SLOTS OPENING ONTO SAID ARCUATE SURFACE, EACH SAID LOBE HAVING AN AREA FOR NON-CONTACTING FLUID-SEALING RELATION WITH SAID ARCUATE SURFACE SUFFICIENTLY LARGE TO CLOSE THE SLOT OPENING WHEN THE LOPE IS OPPOSITE SAID SLOT, SAID SLOTS BEING UNIFORMLY SPACED AROUND SAID ARCUATE SURFACE AND BEING MORE NUMEROUS THAN SAID LOBES, A VANE HAVING OPPOSING SMOOTH FACES FOR SLIDABLY SUPPORTING A VANE IN EACH SAID SLOT, EACH SAID VANE HAVING AN END SURFACE FOR BEARING IN FLUID-SEALING RELATION AGAINST SAID PERIPHERAL BODY SURFACE, SAID VANES HAVING SIDE SURFACES ADAPTED FOR NON CONTACTING FLUID-SEALING COOPERATION WITH THE INTERNAL SIDE SURFACES OF SAID CHAMBER CASING, MEANS FOR BIASING SAID VANES INTO FLUID SEALING CONTACT WITH SAID PERIPHERAL BODY SURFACE, WHEREBY THERE ARE FORMED PLURAL FLUID PRESSURE COMPARTMENTS EACH BOUNDED BY A PORTION OF THE ARCUATE CHAMBER SURFACE, THE PERIPHERAL BODY SURFACE AND A VANE FACE, SAID COMPARTMENTS BEING ALTERNATELY AND SEQUENTIALLY TRANSMUTABLE THROUGH A POWER PHASE AND AN EXHAUST PHASE IN RESPONSE TO ROTATION OF SAID BODY RELATIVE SAID CASING, AN INLET FORMED IN EACH SAID VANE FOR PRESSURIZED FLUID COMMUNICATION TO EACH SAID COMPARTMENT DURING THE POWER PHASE THEREOF, AND AN EXHAUST OUTLET FORMED IN SAID VANE FOR FLUID COMMUNICATION FROM EACH SAID COMPARTMENT DURING THE EXHAUST PHASE THEREOF, WHEREBY FLUID PRESSURE IN COMPARTMENTS IN THE POWER PHASE CAUSES EXPANSION OF SAID COMPARTMENTS WITH CONSEQUENT ROTATION OF SAID BODY RELATIVE SAID CASING AND CAUSES EXHAUST OF FLUID FROM COMPARTMENTS IN THE EXHAUST PHASE.