Patent ID: 7638061

Claim:
A fluid cleaning system, comprising: (a) a dirty fluid receptacle having a bottom, defining a inner surface, and a fluid fill height, said dirty fluid receptacle being adapted and configured to receive and contain a pool of dirty fluid to be cleaned; (b) a rotating magnetic structure, and a magnetic field emanating from said magnetic structure, said magnetic structure being mounted relative to said fluid receptacle such that a lower portion of said magnetic structure extends below the fluid fill height and an upper portion of said magnetic structure extends above the fluid fill height, and wherein given portions of an outer surface of said magnetic structure rotate below and above the fluid fill height, and pick up and separate particulate material from such fluid, thereby to clean such fluid; and (c) discharge structure adapted to remove such particulate material from said magnetic structure, and to convey such particulate material away from said magnetic structure toward a particulate discharge locus of said fluid cleaning system, said discharge structure further comprising a scraper conveyor, elements of said scraper conveyor traversing said dirty fluid receptacle, and scraping particles from the bottom inner surface of said dirty fluid receptacle and moving such particles toward the particle discharge locus.