# US 7,410,574 B2 · Magnetic particle filtration apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,410,574 B2 - Document ID: US7410574B2 - Status: Granted - Kind: B2 - Application number: 11/219,222 - Filed: 2005-09-02 - Published: 2008-01-24 - Granted: 2008-08-12 - Earliest claimed: 2004-03-03 - Assignees: Patent Innovations LLC - Inventors: John M. Hammond - Web page: https://patentgrep.com/patent/US7410574B2 ## CPC - B01D 35/06: Filters making use of electricity or magnetism (ultrafiltration, microfiltration B01D61/14; electrodialysis, electro-osmosis B01D61/42; devices comprising filters and magnetic separators B03C1/30) - B03C 1/286: {disposed at the inner circumference of a recipient, e.g. magnetic drain bolt} - B03C 2201/18: Magnetic separation whereby the particles are suspended in a liquid - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B) ## Abstract An apparatus for separating magnetic particles from a fluid, the apparatus comprising a tubular housing comprising an interior surface, an exterior surface, a first inlet port, a first outlet port, a second outlet port, and a channel; a tubular filter medium disposed within the tubular housing and comprising an inner surface and an outer surface, the filter medium partitioning the channel into a first passageway between the first inlet port of the tubular housing and the second outlet port of the tubular housing, and a second passageway in communication with the first outlet port of the tubular housing; and a wire coil wound around the exterior surface of the tubular housing, the wire coil comprising a first lead and a second lead. In operation, the wire coil is connected to a direct current power supply to effect enhanced separation of magnetic particles from a flowing fluid stream. ## Claims ### Claim 1 An apparatus for separating magnetic particles from a fluid, said apparatus comprising: a) a tubular housing comprising an interior surface, an exterior surface, a first inlet port, a first outlet port, a second outlet port, and a channel; b) a tubular filter medium disposed within said tubular housing and comprising an inner surface and an outer surface, said filter medium partitioning said channel into a first passageway between said first inlet port of said tubular housing and said second outlet port of said tubular housing, and a second passageway in communication with said first outlet port of said tubular housing; and c) a wire coil wound around said exterior surface of said tubular housing, said wire coil comprising a first lead and a second lead. ### Claim 2 (depends on 1) The apparatus as recited in claim 1, wherein said first passageway is formed within said inner surface of said tubular filter medium, and said second passageway is formed between said outer surface of said tubular filter medium and said interior surface of said tubular housing. ### Claim 3 (depends on 1) The apparatus as recited in claim 1, wherein said first passageway is formed between said outer surface of said tubular filter medium and said interior surface of said tubular housing, and said second passageway is formed within said inner surface of said tubular filter medium. ### Claim 4 (depends on 1) The apparatus as recited in claim 1, wherein said tubular filter medium disposed within said tubular housing is coaxial with said tubular housing. ### Claim 5 (depends on 4) The apparatus as recited in claim 4, wherein a first O-ring is disposed between said outer surface of said tubular filter medium and said interior surface of said tubular housing, and a second O-ring is disposed between said outer surface of said tubular filter medium and said interior surface of said tubular housing. ### Claim 6 (depends on 4) The apparatus as recited in claim 4, wherein said tubular filter medium comprises a first end comprising a first flare, and a second end comprising a second flare, and wherein each of said first flare and said second flare are in contact with said interior surface of said tubular housing. ### Claim 7 (depends on 1) The apparatus as recited in claim 1, wherein said apparatus further comprises an electrical power supply connected to said first lead and said second lead of said wire coil. ### Claim 8 (depends on 7) The apparatus as recited in claim 7, wherein said electrical power supply is adapted to provide either direct current or alternating current. ### Claim 9 (depends on 1) The apparatus as recited in claim 1 wherein said tubular filter medium is comprised of a magnetic material. ### Claim 10 (depends on 9) The apparatus as recited in claim 9, wherein said magnetic material is selected from the group consisting of iron, carbon steel, aluminum-nickel-cobalt alloy, samarium-cobalt alloy, and 400-series stainless steel. ### Claim 11 (depends on 10) The apparatus as recited in claim 10, wherein said tubular filter medium consists essentially of 400-series sintered stainless steel. ### Claim 12 An apparatus for separating magnetic particles from a fluid, said apparatus comprising: a) a tubular housing comprising an interior surface, an exterior surface, a first inlet port, a first outlet port, a second outlet port, and a channel; b) a tubular filter medium disposed within said tubular housing and comprising an inner surface and an outer surface, said filter medium partitioning said channel into a first passageway formed between said outer surface of said tubular filter medium and said interior surface of said tubular housing and in communication with said first inlet port of said tubular housing and said second outlet port of said tubular housing, and a second passageway formed within said inner surface of said tubular filter medium in communication with said first outlet port of said tubular housing; and c) a wire coil wound around said exterior surface of said tubular housing, said wire coil comprising a first lead and a second lead. ### Claim 13 (depends on 12) The apparatus as recited in claim 12, wherein said tubular filter medium disposed within said tubular housing is coaxial with said tubular housing. ### Claim 14 (depends on 13) The apparatus as recited in claim 13, wherein a first O-ring is disposed between said outer surface of said tubular filter medium and said interior surface of said tubular housing, and a second O-ring is disposed between said outer surface of said tubular filter medium and said interior surface of said tubular housing. ### Claim 15 (depends on 13) The apparatus as recited in claim 13, wherein said tubular filter medium comprises a first end comprising a first flare, and a second end comprising a second flare, and wherein each of said first flare and said second flare are in contact with said interior surface of said tubular housing. ### Claim 16 (depends on 12) The apparatus as recited in claim 12, wherein said apparatus further comprises an electrical power supply connected to said first lead and said second lead of said wire coil. ### Claim 17 (depends on 16) The apparatus as recited in claim 16, wherein said electrical power supply is adapted to provide either direct current or alternating current. ### Claim 18 (depends on 12) The apparatus as recited in claim 12, wherein said tubular filter medium is comprised of a magnetic material. ### Claim 19 (depends on 18) The apparatus as recited in claim 18, wherein said magnetic material is selected from the group consisting of iron, carbon steel, aluminum-nickel-cobalt alloy, samarium-cobalt alloy, and 400-series stainless steel. ### Claim 20 (depends on 19) The apparatus as recited in claim 19, wherein said tubular filter medium consists essentially of 400-series sintered stainless steel.