# US 11,305,293 B2 · Method and apparatus for recycling asphalt milings > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,293 B2 - Document ID: US11305293B2 - Status: Granted - Kind: B2 - Application number: 16/737,687 - Filed: 2020-01-08 - Published: 2021-07-08 - Granted: 2022-04-19 - Earliest claimed: 2020-01-08 - Applicants: Hector DeFino - Inventors: Hector DeFino - Web page: https://patentgrep.com/patent/US11305293B2 ## CPC - B02C 23/30: the applied gas acting to effect material separation (B02C23/34 takes precedence) - B02C 15/004: {Shape or construction of rollers or balls} - B09B 3/30: involving mechanical treatment (involving an extraction step B09B3/80) - B09B 3/38: Stirring or kneading - C10C 3/007: {winning and separation of asphalt from mixtures with aggregates, fillers and other products, e.g. winning from natural asphalt and regeneration of waste asphalt} - E01C 19/05: Crushing, pulverising or disintegrating apparatus ({preparing and placing involving breaking E01C19/466} ; in general B02C); Aggregate screening, cleaning, {drying} or heating apparatus; {Dust-collecting arrangements specially adapted therefor} - E01C 19/1004: {Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof (E01C19/1036 takes precedence)} - B02C 17/16: Mills in which a fixed container houses stirring means tumbling the charge - B02C 17/163: {Stirring means} - B02C 17/22: Lining for containers - B02C 2015/002: {combined with a classifier} - B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02}) - B09B: DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR - C10C: WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID (compositions of bituminous materials C08L95/00; carbon filaments by decomposition of organic filaments D01F9/14) - E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H) ## Abstract Apparatus and method for recycling asphalt millings containing bitumen and stone. A milling tube is provided having an outer tube and an inner tube axially aligned with and substantially contained within the outer tube, the inner tube having a diameter less that a diameter of the outer tube to thus define a mixing space between the inner and outer tubes. At least one of the inner and outer tubes is adapted to rotate relative to the other. An inlet is provided to the mixing space to receive the asphalt millings. A plurality of inner tube projections project radially outward from a surface of the inner tube toward the outer tube, and a plurality of outer tube projections project radially inward from a surface of the outer tube toward the inner tube. The milling tube facilitates the separation of the asphalt millings into bitumen and stone as one of the inner and outer tubes rotates relative to the other. Preferably, at least one of the outer and inner tubes contains an abrasive coating on a surface thereof, the inner tube projections and outer tube projections are comprised of wire rope, and an inlet is provided in the outer tube through which cold air can be applied to the mixing space. ## Claims ### Claim 1 Apparatus for recycling asphalt millings, said millings containing bitumen and stone, said apparatus comprising: a. a milling tube having an outer tube and an inner tube axially aligned with and contained within said outer tube, said inner tube having a diameter less than a diameter of said outer tube to thus define a mixing space between said inner and outer tubes, either one of said inner and outer tubes rotating relative to and separately from the other, b. an inlet to said mixing space adapted to receive said asphalt millings; c. a plurality of inner tube projections projecting radially outward from a surface of said inner tube toward said outer tube; d. a plurality of outer tube projections projecting radially inward from a surface of said outer tube toward said inner tube; e. whereby said milling tube facilitates the separation of said asphalt millings into bitumen and stone as one of said inner and outer tubes rotates relative to the other. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein at least one of said outer and inner tubes contains an abrasive coating on a surface thereof. ### Claim 3 (depends on 2) The apparatus of claim 2 wherein said inner tube projections and outer tube projections are comprised of wire rope. ### Claim 4 (depends on 2) The apparatus of claim 2 further comprising an inlet in said outer tube through which cold air can be applied to said mixing space. ### Claim 5 (depends on 2) The apparatus of claim 2 wherein said inner tube rotates within said outer tube. ### Claim 6 (depends on 5) The apparatus of claim 5 wherein said abrasive coating is located on an interior surface of said outer tube. ### Claim 7 (depends on 2) The apparatus of claim 2 further comprising an input conveyor adapted to feed said asphalt millings to said inlet to said mixing space.