Pump device

A device comprising:

• an actuator;
• a pump comprising a pump body including a first rack having first arms and a second rack having second arms that are interleaved with the first arms such that there are compartments between the first arms and the second arms, the first rack and the second rack being moveable relative to each other such that compartments are variable in size;
• flexible bladders disposed in the compartments, the flexible bladders containing at least one liquid;
• a plenum fluidly interconnecting interiors of the flexible bladders;
• and
• at least one common port fluidly connected with the interiors of the flexible bladders via the plenum,
• wherein the actuator is operable to actuate the pump body and thereby cause the first arms to move closer to the second arms to reduce the size of the compartments and thus compress the flexible bladders to expel the liquid from the interiors through the plenum to the at least one common port.

A method for using a device, the method comprising:

• providing a device that includes:
• a pump body having at least one variable-size compartment, the pump body configured to be actuated to change the size of the at least one variable-size compartment,
• flexible bladders disposed in the at least one compartment, and
• at least one common port fluidly connected with interiors of the flexible bladders;
• actuating the pump body to thereby change the size of the at least one variable-size compartment, wherein actuation of the pump body compresses or expands the flexible bladders in unison and thereby, respectively, either expels the interiors through the at least one common port or draws a vacuum into the interiors through the at least one common port.