Creamy substance dispenser having non-return valve

Abstract

A creamy substance dispenser has a substantially rigid casing bounding a cylindrical chamber fillable with a creamy substance. A movable piston is slidable on the surface of the chamber for sealingly closing one end of the chamber. A dispensing chamber is separated from the cylindrical chamber by a transverse wall having apertures communicating the cylindrical chamber with the dispensing chamber and appendices projecting about the apertures. A profiled body formed of an elastically deformable material is fixed to the rigid casing and defines an outwardly facing portion of the dispensing chamber. The profiled body has a delivery hole and at least one rib projecting in proximity to the delivery hole and securely engaged with the appendices. A non-return valve has an appendix shaped to seal the delivery hole, and is positioned in the dispensing chamber to prevent return flow of creamy substance in the dispensing chamber to the cylindrical chamber. A guide member cooperates with the transverse wall to guide the non-return valve for movement between a position in which the appendix of the non-return valve seals the delivery hole and a position in which the non-return valve seals the aperture in the transverse wall. An elastically yieldable member reacts between the non-return valve and the transverse wall to urge the non-return valve to the position in which the appendix of the non-return valve seals the delivery hole.