Patent ID: 11938495
Assignee: APTAR RADOLFZELL GMBH
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. A discharge head for a liquid dispenser for dispensing pharmaceutical liquids or cosmetic liquids, the discharge head comprising:
a base and a push actuator which can be pressed down with respect to the base between an unactuated end position and an actuated end position in an actuation direction;
a liquid inlet for connection to a liquid store and a discharge opening for discharging liquid in an environment; and
a pump device which comprises a deformable pump chamber component which is open at both sides and which is secured to the base and to the push actuator and which surrounds a pump chamber being variable in terms of volume and which has an inlet valve and an outlet valve;
the outlet valve having a peripheral annular web which projects downward from an inner end wall of the push actuator in a direction of the base, the outlet valve having an outer side forming a circumferential valve face; and
a displacement structure at an inner side of the annular web, the displacement structure protruding downward from an inner end face of the push actuator, wherein the displacement structure has a receiving space which is open in a direction of the pump chamber and which is laterally closed by a surrounding wall;
the pump chamber having a maximum volume which is defined by an inner space of the pump chamber between the inlet valve and the outlet valve when the push actuator is arranged in the unactuated end position;
the receiving space having a receiving space volume which is formed by a part-volume of the pump chamber which is enclosed within the surrounding wall; and
a relationship between the receiving space volume and the maximum volume is between 1:50 and 1:10.