Stirring device of a machine for making liquid or semi-liquid food products
AssigneeAli Group S.R.L.—Carpigiani
InventorsAndrea Cocchi, Roberto Lazzarini
Life of this patent
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Abstract
A machine used for making liquid or semi-liquid food products, specifically ice cream, comprises a container for processing liquid or semi-liquid base products by means of a stirring device driven by a motor. The stirring device comprises an external mixing structure to which a shaft is fixed so that the motor can drive it in rotation. Keyed to the shaft are scraping elements which scrape the product off the inside walls of the processing container.
Claims7
A stirring device for a machine for making liquid or semi-liquid food products, where the machine comprises a container for processing a liquid or semi-liquid product, the stirring device being, in use, mounted inside the container to stir the liquid or semi-liquid product that is inside the container;
- the stirring device comprising:
- a central mounting element;
- an external mixing structure rotatably mounted inside the container and fixed to the central mounting element;
- at least one scraping element having an at least partly helical shape and being keyed to the central mounting element;
- wherein the central mounting element comprises a shaft with an at least partly prismatic cross section is prismatic on which the at least one scraping element is fitted by prismatic coupling to the shaft;
- wherein the at least one scraping element includes a plurality of scraping elements each having an at least partly helical shape and being keyed one after the other to the central mounting element;
- a locking and compacting mechanism acting on an outermost one of the scraping elements keyed to the shaft;
- wherein the locking and compacting mechanism comprises a flat, perforated element traversed by a first end of the shaft and adapted to be applied abuttably from an exterior on a first extremity of the external mixing structure, where the first end passes through a first hole made in the first extremity, the flat, perforated element being joined to a perforated disc by a rod which passes through a first lateral hole of the first extremity and is slidably inserted into a tube fixed to the perforated disc, where the perforated disc is applied abuttably from the exterior on a second extremity, opposite to the first extremity, of the external mixing structure, the perforated disc being fixed to a second end of the shaft which passes through a second hole in the second extremity while the tube passes through a second lateral hole of the second extremity, where the scraping elements are positioned between the first extremity and the second extremity of the external mixing structure.
Dependencies are inferred from the claim text.