Tap Made of Plastic Material for Delivering Liquids from Vessels

A tap for delivering liquids from a vessel, the tap comprising:

• an elongated supporting body equipped with an inclined internal contact surface next to its delivery end;
• an upper closing element and tamper-preventing seal which closes the delivery end of the supporting body;
• a dome-shaped elastic valve element at an opposite end with respect to the delivery end of the supporting body, the dome-shaped elastic valve element performing an automatic closure of the tap;
• and
• a plate operatively connected to the dome-shaped elastic valve element;
• a pin centrally placed inside the supporting body and equipped with an O-ring adapted to sealingly engage the inclined internal contact surface when the tap is closed, the dome-shaped elastic valve element being operatively connected to the pin;
• wherein the dome-shaped elastic valve element rests on the plate and pushes pin and O-ring against the inclined internal surface of the supporting body, performing an operating seal with the tap closed, and wherein, when an assembly of pin O-ring dome-shape elastic valve ends its operating stroke and the pin collides with an interior of the dome-shaped elastic valve element, the dome-shaped elastic valve element is blocked and simultaneously allows entering into the elongated supporting body liquid to be delivered, creating an open channel which allows the continuous delivery of the product contained in the vessel.