Therefore, when the rotor shaft rotates, the blades are introduced and exit from the rotor shaft and the half round shoes, swing and copy the stator contour and vary {HEAD ~ the volume} of the chambers; in this way, the blade control and guidance system is eliminated, high operating speeds under high pressures are obtained, with very good yield and {TAIL ~ reduced manufacturing costs}, which is the object of the instant invention 
Therefore , when the rotor shaft rotates , the blades are introduced and exit from the rotor shaft and the half round shoes , swing and copy the stator contour and vary { HEAD ~ the volume } of the chambers ; in this way , the blade control and guidance system is eliminated , high operating speeds under high pressures are obtained , with very good yield and { TAIL ~ reduced manufacturing costs } , which is the object of the instant invention
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