Unit for dispensing at least one fluid product, in particular a cosmetic or pharmaceutical product

In a unit for dispensing at least one fluid product, said unit comprising:

• (a) a container;
• (b) a dispensing head;
• (c) said dispensing head including means defining at least one dispensing duct for said at least one fluid product to be dispensed, said dispensing duct having a first and a second end;
• (d) closing means situated at said second end of the said at least one dispensing duct;
• (e) said dispensing duct means comprising an obturator which forms part of a first component of the dispensing head made of an elastically deformable material and at least one seat which forms part of a second component of the dispensing head;
• (f) said obturator being adapted to be in contact with said seat when no dispensing is taking place, but to move away from said seat by elastic deformation under pressure of the product being dispensed and to reenter into contact with said seat by elasticity when dispensing stops;
• the improvement comprising:
• (g) said at least one dispensing duct comprising a first duct portion having one end in communication with a flexible enclosure for the product and a second end in communication with a one way valve means;
• said dispensing head including operating means for opening said one way valve means to cause the product to move through said one way valve means toward said obturator, said dispensing head including a constraining element engaging said obturator to restrain movement of said obturator during dispensing to thereby cause the product to be dispensed by movement along said dispensing duct to said second end thereof to be dispensed, said constraining element comprising a cover extending over at least a part of said obturator.