Rotating and reciprocating piston device

A rotating and reciprocating piston device comprising:

• chambers disposed about a chamber axis, the chambers having two ends and a port for passage of a fluid at each one of the ends of the chambers;
• pistons having two ends, each one of the pistons slidably positioned within a respective one of the chambers thereby determining a space at either end of each piston within its respective chamber;
• a track forming a closed circuit through which the chamber axis passes;
• and
• guiding devices, each one of the guiding devices for guiding a respective one of the pistons along the track;
• wherein during operation:
• the device cycles through a plurality of stages wherein a position of a piston within its respective chamber determines the stage for that piston and hence the space on either side thereof;
• each piston slides within its respective chamber and thereby continuously varies the space at either end of each piston within its respective chamber;
• and
• each port admits or exhausts the fluid respectively to or from the space depending on the stage of the plurality of stages.