Patent ID: 9636610
Date: 2017-05-02
CPC Classifications: A23L,A23V,B01D

Claim:
1. A brine filtering device, applicable to a meat product injection machine, comprising a pre-filtering unit and a safety filtering unit, said pre-filtering unit comprising: a tub; a first pre-filtration drum and a second pre-filtration drum coaxially arranged to rotate together about a common horizontal rotation axis; the first pre-filtration drum having a first filtering wall arranged around said common horizontal rotation axis and opposite side walls, at least one of said side walls of the first pre-filtration drum being an open side wall; the second pre-filtration drum having a second filtering wall arranged around the common horizontal rotation axis, a closed side wall adjacent and facing said open side wall of the first pre-filtration drum, an opposite open side wall adjacent said safety filtering unit, and a perimetric flange extending radially outwards from one end of the second pre-filtration drum adjacent to said open side wall; a lower region of said first filtering wall and a lower region of said second filtering wall being located below said common horizontal rotation axis within said tub and for submersion in brine contained in the tub, the brine defining a brine level in the tub; a curved channel coaxial with the common horizontal rotation axis and located at one end of the tub, said curved channel having opposite ends located above the brine level and an intermediate region located below the brine level; a lower region of said perimetric flange of the second pre-filtration drum is located in the curved channel, wherein a friction fit between outer surfaces of the perimetric flange and inner surfaces of the curved channel form a seal therebetween; an inlet hopper located on an upper region of the first pre-filtration drum, said inlet hopper adapted to receive brine to be filtered and forcing by gravity the brine to be filtered into the first pre-filtration drum through the first filtering wall, wherein brine pre-filtered by the first pre-filtration drum is collected in the tub, brine in the tub entering the second pre-filtration drum only through said submerged lower region of the second filtering wall by hydrostatic pressure; a first scraper arranged to scrape an outer surface located outside the tub of the first filtering wall of the first pre-filtration drum and a second scraper arranged to scrape an outer surface located outside the tub of the second filtering wall of the second pre-filtration drum; said safety filtering unit comprising: a tank having a side wall attached to said end of the tub closed by the curved channel and the perimetric flange, said tank being in communication with the tub through the open side wall of the second pre-filtration drum, wherein brine in the second pre-filtration drum flows into the tank through only the open side wall of the second pre-filtration drum and over said intermediate region of the curved channel; and at least one safety filter sleeve located in said tank and connected to an outlet of the tank.