Patent ID: 6539986
Filing Date: 2003-04-01
Classification: F04B

Abstract:
A liquid discharging apparatus comprising:a pump body incorporating an elastically deformable pump member therein and having a pump chamber expanding and contracting by said pump member; an inflow passage provided between said pump chamber and a liquid storage tank containing liquid, and provided with such an inflow side valve as to open when said pump member executes an operation of a suction stroke; a pressure regulating passage provided between said pump chamber and a pressure regulating opening portion, and provided with such a pressure regulating valve as to open when said pump member executes a discharging operation of an exhaust stroke and to keep pressure inside said pump chamber constant; and a discharge passage provided between a discharge nozzle and said pump chamber, and provided with such a discharge side valve as to open when said pump member executes an operation of a discharge stroke.