FIELD: manufacture of pumps, engines and compressors. SUBSTANCE: machine is provided with sleeves of nonlinear and curvilinear configuration located in sleeve unit revolving around axis which may coincide with or cross the axis of rotation of shaft on side of their center of curvature. Pistons revolve together with sleeves around inclined axis which coincides with axis of rotation of sleeves or passes through the same center without relative overlapping of elements. Machine is additionally provided with centering members for centering the sleeve unit on drive shaft and flexible members pressing the sleeve unit through centering members in direction of members ensuring the reciprocating motion. EFFECT: enhanced reliability. 17 cl, 13 dwg
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