Dry (non-lubricated) claw compressors have a promising future because they possess the advantages of both piston and rotary compressors. The rotor profiles have sophisticated form including several curves of similar type, combined so that the line of contact is always parallel to the rotor axis. We have considered the effect of the main geometric parameters of the profile (R, αR and r) on the rotor-swept area value, on the volume of the cavity and on the amount of leakage through the clearances. The study has been carried out by the developed computer program intended for selecting the optimal variant for the ratio of geometrical parameters of the profile. We have given the results of theoretical studies on the influence of the profile’s geometric parameters on integrated characteristics of a rotor-geared compressor. We have presented optimal relations between the parameters defining the geometry of gas distribution elements.