Patent ID: 7882988
Filing Date: 2011-02-08
Classification: B05B

Abstract:
1. A pump for dispensing a liquid or semi-liquid product, designed to be used, in particular, in the pharmaceutical or cosmetic field, said pump comprising a pump body and a dispensing head manually movable on the pump body between an inactive position and a punctual product-dispensing position, the dispensing head comprising: a cylinder forming a dosage chamber, said chamber communicating with a liquid intake tube by means of a device forming an intake valve, said cylinder being slidingly mounted in the pump body; a channel allowing the product or air to pass from the dosage chamber towards an ejection orifice of the liquid product or air, an exhaust valve made up of a rod, the bottom end of which seals the dosage chamber at the top, and which comprises means for airtightly sealing the channel consisting of a peripheral shoulder capable of coming to a rest against a matching sealing seat, the channel being opened by separating the shoulder from the seat of the cylinder after the rod reaching its stop early during the axial movement of the cylinder in the pump body and, a push button fitted onto the top part of the cylinder by means of a first skirt and designed to activate the axial movement of the cylinder, characterised in that said sealing seat is arranged in the cylinder, while the channel is arranged between the outer wall of the cylinder and the inner wall of the first skirt.