US Patent 10086395 Dispenser

The invention relates to a dispenser (1) for dispensing liquid to pasty masses, with a dispenser head (2) that can move under exposure to a spring force for dispensing mass (M), a storage chamber (3) and a pump chamber (4) exhibiting an inlet valve (11) and an outlet valve (12), wherein the dispenser head (2) incorporates a dispenser opening (5) and, in order to seal or release the dispenser opening (5), a closure piston (6) that can be moved in the direction of its longitudinal axis (L), exhibits a distal end allocated to the dispenser opening and a proximal end, and is situated in a mass space (9) of the dispenser head, wherein a section (10) that connects the pump chamber (4) to the mass space (9) further empties into the mass space (9) between the distal and proximal end of the closure piston (6), wherein said connecting section exhibits a central axis (A). In order to favorably design such a dispenser as relates to introducing the dispensing process, it is proposed that the outlet valve (12) of the pump chamber (4) be rigidly coupled with the dispenser head (2), and, when actuated in a first movement segment of the dispenser head that already involves a release of the closure opening (5), a movement into the open position take place, for example the outlet valve (12) enter the pump chamber (4), without otherwise making the pump chamber (4) smaller, at least not significantly.