Fluid discharging device with a reciprocating pump member defining an outlet valve, and a valve member defining an outlet and suction valve

A fluid discharging device comprising a pump member, a valve member, a suction passage and an outlet capable of communicating with a measuring space to be closed by the pump member and the valve member, wherein;

• said valve member is provided with said outlet and is provided so as to be movable forward and backward in the axial direction of the outlet relative to the pump member, and this valve member is provided with a suction passage opening and closing portion capable of closing or opening said suction passage by being attached to or detached from said pump member with the forward or backward movement of it, and
• said pump member is provided with an outlet opening and closing portion capable of closing or opening the outlet by being attached to or detached from the outlet of the valve member and a measuring portion which is arranged in the shape of a concentric circle outside this outlet opening and closing portion and is capable of changing the volume of a measuring space by being moved forward and backward relative to said measuring space;
• and
• said fluid discharging device is provided with;
• an outlet opening and closing means for closing and opening the outlet by moving said outlet opening and closing portion forward and backward relative to the outlet, and can open the suction passage by detaching the suction passage opening and closing portion of the valve member from the pump member through energizing said valve member away from the pump member,
• a measuring portion moving means which is arranged in the shape of a concentric circle outside the outlet opening and closing means and can change the volume of the measuring space by moving said measuring portion forward and backward relative to the valve member,
• an energizing means for closing the suction passage by pressing said suction passage opening and closing portion against the pump member through energizing said valve member toward the pump member, and
• a driving means for driving said outlet opening and closing means and said measuring portion moving means respectively in their specified action manners.