Patent ID: 8534506

Claim:
A dispenser pack comprising a standard metering pump and a container that is tightly connected to said metering pump, comprising a closing cap that can be attached to a neck of the container, having a cylindrical wall that encloses an axial aperture that is arranged above an internal flange; a retainer for attaching the pump within the aperture of the closing cap, wherein an exterior flange of the retainer can be pressed against an annular seal on an outer face of the container neck so as to be sealed by the closing cap; a flow path defined between the retainer and the pump; a pump housing comprising a pump cylinder that surrounds a pump chamber, the retainer being a separate component from the pump housing; a pump piston which is arranged in the pump chamber so as to be slidable in a sealed manner and comprises a piston shaft which protrudes outward from the pump chamber and at its outer end comprises an activation and dispensing head; an axial outlet channel that extends through the piston shaft and the pump piston and connects the pump chamber to a dispensing aperture of the activation head; an inlet valve and an outlet valve for a free-flowing medium; and a helical compression spring which impinges on the pump piston, the volume of the container that contains the free-flowing medium can be adjusted to the decrease of the volume of the free-flowing medium to be dispensed from the container; and the annular seal having an inner hole rim resting against the outside of the pump housing so as to close the flow path to prevent ventilation of the container through the flow path, and wherein the annular seal comprises an annular lip which forms the hole rim and is pressed radially inward in the form of a truncated cone across an annular space in the flow path against the cylindrical outside of the pump housing so as to seal the flow path, the annular lip having a radial thickness that provides a radial space between the annular lip and the retainer.