Patent ID: 8448826

Claim:
A head for dispensing a dosage of a free-flowing substance from a source container, the head comprising: a slider, comprising a passage opening and a guide strip; a body, comprising: an end surface; an outlet opening; an area adapted for coupling the body with the source container or a closure lid of the source container; and a groove, at least a partial section of which is offset parallel to itself, the offset being matched to the respective widths of the guide strip and the groove, to serve to guide the slider in a linear movement thereof; and an aperture-setting member, arranged on the body for rotation about a rotary axis that is orthogonal to the end surface, the rotary movement thereof serving to actuate the slider, the aperture setting member comprising an orifice opening, configured such that, for any position of the aperture-setting member relative to the body, the outlet opening falls within the area of the orifice opening, and, as the slider moves in a linear path relative to the body, the flow rate of free-flowing substance through the passage opening is regulated.