Liquid dispensing tap, particularly for dispensing liquids with higher densities from rigid vessels

Tap (1) for delivering liquid, particularly for delivering liquids with higher density from rigid vessels, comprising:

• a body (3) equipped with a connection part (40) to a vessel of liquid to be delivered and with a liquid delivering passage (5, 22);
• stem means (9) adapted to open and close the liquid delivering part (5);
• elastic actuating means (11) adapted to actuate said stem means (9) in their delivery opening and closing positions;
• air inlet and outlet means (13, 25, 28) in the body (3) and inside the vessel;
• valve means (7) adapted to open and close the air passage in said air inlet and outlet means (13, 25, 28);
• and
• non-return valve means (26) placed in said body (3) between said air inlet and outlet means (13, 25, 28) and a vessel interior, said non-return valve means (26) being adapted to be guided and driven by a pressure difference between outside the tap (1) and inside the vessel;
• characterised in that it further comprises a first engaging element (B) with anti-counterfeiting and protecting function, a second engaging element (C) with anti-counterfeiting and protecting function, adapted to operate with a plane (41) obtained on the tap body (1) to determine the correct positioning of the tap (1) on the vessel, a first small flexible lip (40) adapted to block the tap (1), and a third engaging element (A) with anti-counterfeiting and protecting function, shaped as a second small flexible lip at 180° from the first small lip (40), adapted to engage the external side of the first engaging element (B), generating a combination of forces which performs the anti-counterfeiting and protecting function.