POSITIVE-DISPLACEMENT MACHINE Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: positive-displacement machine has hollow cylindric housing with face covers, four displacers, and drive. The displacers are mounted inside the housing to define chambers of variable volume. The displacers are made up as semi-cylinders and pivotally interconnected. The drive is kinematically coupled with the pivot of at least one of the displacers. The inner surface of the housing is provided with at least one cogs and the outer surface of one of the displacers is provided with at least one hollow to provide gear engaging whose gear ratio is two. The diameters of the smooth parts of the inner surface of the housing and the outer surface of the displacers are equal to the diameters of the initial circumference of the engaging. EFFECT: enhanced efficiency. 2 dwg