Pump and combination pump/mixer device

A pump/mixer device comprising:

• a main inlet located at a top or upper region of a pump/mixer, the main inlet configured to be secured to or integrated into a bottom of a vessel or container containing a liquid therein;
• an outer chamber disposed in the pump/mixer and fluidically connected to the main inlet;
• a plurality of lower chambers disposed in the pump/mixer beneath the outer chamber and fluidically connected to the outer chamber by respective check valves interposed between the outer chamber and the plurality of lower chambers, each lower chamber configured to receive the liquid from the outer chamber via the respective check valves;
• a central chamber disposed in the pump/mixer, the central chamber fluidically connected to the plurality of lower chambers with respective check valves interposed between the central chamber and the plurality of lower chambers, the central chamber configured to receive the liquid from the plurality of lower chambers via the respective check valves interposed between the central chamber and the plurality of lower chambers;
• at least one outlet fluidically connected to the central chamber;
• one or more additional liquid inlets fluidically coupled to the central chamber via respective inlet check valve(s) and coupled to respective liquid sources;
• and
• a moveable diaphragm disposed in each of the plurality of lower chambers, the moveable diaphragms interfacing with a respective actuating element driven by a nutating disk or wobble plate operatively coupled to a motor or drive unit, wherein actuation causes each of the moveable diaphragms to move in opposing directions;
• and
• wherein the outer chamber circumscribes the central chamber as an annulus.