Pump for dispensing liquid or semi-liquid or semi-solid food products and machine comprising said pump

A pump for dispensing semi-liquid food products, comprising:

• an inlet opening,
• an outlet opening,
• a dispensing path between the inlet opening and the outlet opening;
• a rotor for pushing the product along the dispensing path, the rotor including an outer periphery;
• an airtight chamber interposed between the inlet and outlet openings, the airtight chamber having an inner periphery, the rotor positioned inside the inner periphery;
• the dispensing path being defined by a gap formed between the outer periphery of the rotor and the inner periphery of the airtight chamber;
• the inner periphery of the airtight chamber being elastically deformable and the outer periphery of the rotor including at least one protruding portion suitable for sealingly engaging the inner periphery of the airtight chamber to cyclically choke the gap;
• two rigid half-shells externally enclosing the airtight chamber, the two rigid half-shells being sealingly coupled to each other;
• two facing elastomeric elements housed within the two rigid half-shells, the two facing elastomeric elements delimiting at least a partially cylindrical central cavity and defining the elastically deformable inner periphery of the airtight chamber which is sealingly engaged by the outer periphery of the rotor.