Rotary swinging subassembly and device for cointegrated fluidic multiplexing and volumetric pumping of a fluid

The invention relates to a rotary swinging subassembly (1) for volumetrically pumping a fluid, wherein said subassembly comprises a hollow body (2) through which pipes (CPi, CDi) pass, a piston (4) accommodated in said cavity (25) defining a work chamber (5) therewith, said piston (4) comprising a recess (43) which is in fluid communication with said work chamber (5) and which is capable of a rotary swinging motion to optionally position the recess (43) in alignment with a pipe (CPi, CDi) and to vary the volume of said work chamber (5), a jacket (3) through which the openings (OPi, ODi) pass, said jacket being inserted between said piston (4) and said body (2) and suitable for adopting different consecutive fluid configurations in each of which each pipe (CPi, CDi) is selectively in an off-state or on-state. A rotary swinging pumping device comprises such a rotary oscillating subassembly (1), drive means and mechanical coupling means.