F04B 27/0644

Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary {having cylinders in star- or fan-arrangement, the connection of the pistons with an actuating element being at the outer ends of the cylinders rotary cylinder block with two or more series radial piston cylinder units directly located side by side cylinder block and actuating cam both rotating}