Patent ID: 6878274
Filing Date: 2005-04-12
Classification: A23B

Abstract:
1. A device for filtering fluid substances, used for a meat material injecting machine, comprising a coarse filter provided with means for retaining and withdrawing from a fluid largest particles to produce pre-filtered fluid and at least a first filter and a second fine filter for retaining smallest particles remaining in said fluid after passing through said coarse filter, selecting means being arranged for selectively allowing said pre-filtered fluid to pass through at least said first fine filter and/or through said second fine filter towards a sucking outlet, wherein: said first and second fine filters are located within a container provided for temporarily retaining said pre-filtered fluid coming from said coarse filter; said container is provided with collecting means for collecting and directing said fluid towards the sucking outlet; said selecting means are associated with respective inlets of said collecting means; said first and second fine filters are mounted on independent supporting means fastened to said selecting means, each of said supporting means being susceptible to be independently placed in; a working position, in which said corresponding first or second fine filter is submerged, and said selecting means allow said fluid to pass through said corresponding first or second fine filter; and a cleaning position, in which said corresponding first or second fine filter is emerged at least in part, said selecting means block the passage of said fluid through said corresponding first or second fine filter, and said corresponding first or second fine filter is susceptible to be dismounted for being cleaned; and wherein said collecting means comprise at least one external cylindrical wall arranged in horizontal position in which said inlets are open while said selecting means comprise respective selector bodies having internally cylindrical walls in which passageways are open, the internally cylindrical walls of the selector bodies being tightly mounted on said externally cylindrical wall of said collecting means and susceptible to rotate thereabout, communicating said passage of said corresponding selector body with said respective inlet in said working position and interposing a closing portion of said corresponding internally cylindrical wall for closing said inlet in said cleaning position.