Patent ID: 6935540

Claim:
A dispensing assembly for dispensing a substance from a receptacle, the receptacle comprising a neck and a rim, the dispenser assembly comprising: pump assembly that comprises at least an exit tube through which the substance leaves the pump assembly, and a dip tube coupled to the exit tube and extending into the receptacle for transporting substance from the receptacle towards the exit tube; a ferrule for maintaining a coupling of the pump assembly to the receptacle, the ferrule comprising an outer surface and an interior cavity, an aperture through which at least the exit tube of the pump assembly extends, an a plurality of bendable and depending legs for engaging the rim of the receptacle; a gasket, positioned in the interior cavity of the ferrule and having an opening through which the pumping assembly is positioned, the gasket being in frictional engagement with the ferrule and for at least maintaining an airtight seal between the pumping assembly and the receptacle; and an annular collar, the collar having an inner surface and an outer surface, the inner surface comprising outwardly projecting elongated ribs, the ribs extending along the inner surface thereof and non-orthogonally to a longitudinal axis of the collar; wherein the ribs are angled along the inner surface of the collar and the frictional engagement between the gasket and the ferrule is sufficient such that: the collar is caused to rotate along the outer surface of the ferrule as the collar is pressed towards the receptacle; and the elongated ribs form complementary elongated grooves in the outer surface of the ferrule as the collar is being fitted thereon; wherein the plurality of depending legs are locked in engagement with the rim of the receptacle to maintain the coupling of the ferrule with the receptacle; whereby an airtight seal is provided between the dispensing assembly and the receptacle when the collar is positioned over the ferrule and the collar secures the engagement of the legs with the rim of the receptacle.