In a liquid discharge control apparatus which uses a piezoelectric type diaphragm pump, an accumulator having a liquid accumulation cavity and a movable member is communicated to an outlet of the diaphragm pump. In discharge operation of the diaphragm pump, a quantity of the liquid in the liquid accumulation...http://www.google.se/patents/US7942650?utm_source=gb-gplus-sharePatent US7942650 - Liquid discharge control apparatus including a pump and accumulator with a movable member
