AXIAL PISTON MACHINE Russian patent published in 2008 - IPC F01B3/08 

FIELD: engines and pumps.

SUBSTANCE: machine relates to machine building and can be used as pump or compressor to pump over liquids or gases. It incorporates casing, intake and outlet valves and drive shaft. Casing and shaft cylindrical spaces form a common cylindrical chamber housing two pistons dividing this chamber into three working cylinders. Pistons outer surfaces are furnished with closed helical grooves accommodating dogs linking pistons with casing. Pistons are splined to the drive shaft. Said spline allows together with helical grooves pistons translation in the opposite directions during drive shaft rotation.

EFFECT: simple design, high manufacturability, efficiency and dynamic balance.

2 dwg