and 32 lead to fluid chambers 34 and 36 respectively that are on either side of piston 40 having fluid actuatable surfaces 41 and 43 and piston output numbers 42 and 44 passageways 30 and 32 can be selectively opened and closed with electrically operable valves 31 and 33 respectively valves 31 and 33 may each comprise a shape changing valve actuator member fixed at one end with the other end coupled to a movable closure member that is adapted to close and open the fluid communication passageway the valves could be accomplished in other manners such as with more traditional solenoid actuated closure members that can also be more traditional valve member constructions non limiting examples include ball valves gate valves and butterfly valves an alternative preferred embodiment is shown in fig2 the difference is that in this case actuator member 16 is coupled at its free end 22 to bellows members 50 that moves fluid in chamber 18 a the bellows can magnify the relatively small displacement of the actuator member to accomplish greater fluid displacement for a desired purpose 0033 fig3 shows one pump actuation and valve control scheme useful for any embodiment of the invention in this case the pump actuator member is excited by an oscillating current the valves are opened and closed at a frequency equal to the.