Claw rotor compressors are rotary positive displacement machines with built-in compression. They are characterized by greater performance if compared to Roots blowers and are more efficient in discharging gas at pressures substantially higher than at suction. This paper aims at proposing a rotor profile suitable for the claw-type mechanism, with thorough indication of the profile geometry. After presenting some graphical cases of rotor profiles, drawn according to the proposed geometry, comparisons with a reference profile suggest that the proposed one seems to be preferable from a filling point of view.

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