Disc pump with advanced actuator

A pump comprising:

• a pump body having pump walls substantially cylindrical in shape and having a side wall closed by two end walls for containing a fluid;
• an actuator disposed between the two end walls and being a first portion of a common end wall forming a first cavity and a second cavity, each cavity having a height (h) and a radius (r), wherein a ratio of the radius (r) to the height (h) is greater than about 1.2, the actuator operatively associated with a central portion of the common end walls and adapted to cause an oscillatory motion of the common end walls at a frequency (f), thereby generating radial pressure oscillations of the fluid within both the first cavity and the second cavity;
• an isolator extending from the periphery of the actuator to the side wall as a second portion of the common wall and flexibly supporting the actuator;
• a first aperture disposed at a location in the end wall associated with the first cavity and extending through the pump wall;
• a second aperture disposed at another location in the end wall associated with the first cavity and extending through the pump wall;
• a first valve disposed in one of the first and second apertures to enable the fluid to flow through the first cavity in one direction when in use;
• a third aperture disposed at a location in the end wall associated with the second cavity and extending through the pump wall;
• and
• a second valve disposed in the third aperture to enable the fluid to flow through the second cavity in both directions when in use.