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| Number | Title | Issue Date |
| 8157431 | Low emission energy efficient 100 percent RAP capable asphalt plant An HMA plant which uses combination direct exhaust heated and indirectly steam heated pre-heating drum in combination with a sealed indirect hot oil heated rotary shaft mixer, where the steam given off from the heated HMA is maintained, separated from the sulfur con... | 04/17/2012 |
| 8066421 | Method of adding STMP to a gypsum slurry The disclosure relates to a method for effectively and efficiently adding sodium trimetaphosphate to a gypsum slurry. In one exemplary embodiment, the sodium trimetaphosphate is added at the same time as foam is added to the gypsum slurry through the foam waterline.... | 11/29/2011 |
| 8066422 | Material moisture content adjustment method When making moisture content adjustment by adding liquid such as water to a raw material such as pulverulent material including bentonite, uniform mixing of the liquid such as water with the raw material is given with relatively simple facilities, moisture content a... | 11/29/2011 |
| 7950841 | Concrete cooling injection unit and method of injecting a coolant into a concrete mixture A method and apparatus for cooling a mixture with an injection system. The injection system is adjustable to accommodate the relative position and particular specifications of a given container (e.g., concrete mixer). In one embodiment, the injection system is opera... | 05/31/2011 |
| 7357562 | Counter-flow drum mixer asphalt plant with two stage mixing zone A counter-flow drum mixer asphalt plant equipped with a secondary feeder for introducing RAP to direct radiant heat of the combustion zone. Heated virgin aggregate and RAP in the combustion zone are delivered through a transition piece to a first stage of the mixing... | 04/15/2008 |
| 7225932 | System units for treatment of aggregate material An aggregate storing and classifying mechanism for production of asphalt in plants, comprising a body (2) having plurality of circular sections (6) arranged in a manner of substantially surrounding the body (2) for storing aggregate material com... | 06/05/2007 |
| 7114843 | Method of manufacturing a bituminous coated aggregate mix A method of manufacturing a bituminous coated aggregate mix, said method comprising at least the following steps: (a) course aggregate are dried by heating; (b) an intermediate mix is formed by coating the course a... | 10/03/2006 |
| 7044630 | Counter-flow asphalt plant method A method for operating a counter-flow aggregate dryer for an asphalt plant in which primary aggregate materials are introduced into a first end of a horizontally rotating cylinder and travel to the second, discharge end of the cylinder through drying and combustion ... | 05/16/2006 |
| 6928891 | Material sample preparation apparatus and method An automated apparatus for preparing material samples includes a rotatable drum support assembly, a drum rotatably contacting the drum support assembly, a fan, and a powered drive mechanism. The drum includes a hollow main section and first and second hollow end sec... | 08/16/2005 |
| 6832850 | Hot-mix asphalt manufacturing system and method A hot-mix asphalt manufacturing system includes a counter-flow rotary dryer having a combustion chamber, an inlet for dry ingredients, an outlet for hot-mix asphalt, and a pollution control device. The pollution control system includes a pre-filter, a cooling device... | 12/21/2004 |
| 6780356 | Method for producing an inorganic foam structure for use as a durable acoustical panel A process and apparatus for creating an acoustically absorbent porous panel comprises the steps of dispensing cement and fibers with a dry mixer to create a dry mix and aqueous mixing water, surfactant and air with an aqueous mixer to create a foam. The process and ... | 08/24/2004 |
| 6733168 | Separating and sorting apparatus for asphalt An apparatus and method for testing asphalt in the field is described. The apparatus includes a motor for rotatively driving a chamber containing the asphalt to be tested. The chamber is rotated while cooler, ambient air is circulated through the asphalt particulate... | 05/11/2004 |
| 6676862 | Method for forming lightweight concrete block A method and apparatus for efficiently forming individual building units is provided, generally includes providing a plurality of molds, each capable of simultaneously forming a plurality of building units. Batches of cementitious slurry are individually ... | 01/13/2004 |
| 6533970 | Method for making aerated concrete blocks having at least one passageway drilled therein A method for making aerated concrete blocks includes dispensing materials for making aerated concrete into a mold and allowing the materials to rise and stiffen into a body. The body may be divided into an array of blocks which are then cured. At least on... | 03/18/2003 |
| 6425685 | Process for reclaiming salvaged asphalt A process for reclaiming salvaged asphalt includes feeding salvaged asphalt mixed with new sands, stones and tar in a designed proportion into a double-layer drying machine including inner and outer gyroscopic drums; indirectly heating the salvaged asphal... | 07/30/2002 |
| 6267847 | Pulper for a stock preparation system A pulper in a stock preparation system includes a housing with a fiber inlet, at least one water inlet, at least one outlet and an inner chamber. A plurality of stationary pulping foils are attached to the housing and extend into the inner chamber. A rota... | 07/31/2001 |
| 6030111 | Method of and system for recycling molding sand Molding sand of a used greensand mold is recycled by adding water and binder to sand particles fatigued by heating applied by a molten metal during molding and segregated from vigorous molding sand not directly heated by the molten metal and mixing the re... | 02/29/2000 |
| 5664881 | Counter-flow asphalt plant with multi-stage combustion zone overlapping the mixing zone A drum mixer is provided with a rotatable cylinder in which aggregates, reclaimed asphalt pavement and liquid asphalt are mixed to produce an asphaltic composition. The drum cylinder includes a first region, in which virgin aggregate is heated and dried b... | 09/09/1997 |
| 5277490 | Method and apparatus for producing bituminous mixtures Method and apparatus for producing mixtures containing bitumen, in which the material to be treated is conveyed by the force of gravity through a slit-type space between two vertically arranged heated surfaces.... | 01/11/1994 |
| 5201839 | Countercurrent drum mixer with second heat source An asphalt production system utilizing a pair of rotatable drums for producing an asphaltic composition is provided. The asphaltic composition is produced by separately heating a volume of virgin aggregate material in a countercurrent drum dryer and heati... | 04/13/1993 |
| 5100239 | Method of manufacturing concrete Method for manufacturing concrete by mixing concrete materials including a cement, aggregate, admixture and at least one of water and ice. The aggregate is moved prior the mixing and a low-temperature liquid is sprayed on the aggregate for cooling while t... | 03/31/1992 |
| 4989986 | Double counter flow drum mixer A drum mixer is provided for producing an asphaltic composition. The drum mixer utilizes a first heat source located at an intermediate position within the drum mixer for producing a first current of hot gases directed towards the entry end of the drum mi... | 02/05/1991 |
| 4957434 | Method and apparatus for treating asphaltic concrete paving materials A method of heating reclaimed asphalt paving is shown and described. An air sorter removes fine materials from the reclaimed asphalt paving, and an air circulating dryer which utilizes high velocity air impingement, removes the moisture from the material.... | 09/18/1990 |
| 4940334 | Reverse flow mixing method for direct-fired asphaltic concrete drum mixers A reverse flow post-mixer attachment for direct-fixed asphaltic concrete mixers includes a modified discharge box for the downstream end of the drum and an enclosure for the downstream portion of the drum forming a passage along the exterior of the drum. ... | 07/10/1990 |
| 4919538 | Drum mixer having a combined mixing and heating zone A combustion housing for surrounding a burner flame is provided at an intermediate location within a drum mixer. An annulus is formed by the combustion housing and the interior of the drum adjacent thereto. Hot virgin aggregate is mixed with cold recycle ... | 04/24/1990 |
| 4913552 | Countercurrent drum mixer A drum mixer having an countercurrent flow drying zone and a parallel flow mixing zone is provided for producing an asphaltic composition. The drum mixer utilizes a heat source located at an intermediate position therein for generating three streams of ho... | 04/03/1990 |
| 4887908 | Mobile asphalt crack sealant apparatus Disclosed is a mobile sealant material apparatus comprising a frame adapted for vehicular movement and bearing a scraped-surface, indirectly-heated jacketed vessel for housing heated, fluid sealant material. Heated fluid heating media is heated in heating... | 12/19/1989 |
| 4856202 | Method and apparatus for treating asphaltic concrete paving materials A method of heating reclaimed asphalt paving is shown and described. An air sorter removes fine materials from the reclaimed asphalt paving, and an air circulating dryer which utilizes high velocity air impingement, removes the moisture from the material.... | 08/15/1989 |
| 4787938 | Countercurrent drum mixer asphalt plant A drum mixer asphalt plant is provided with a rotatable cylinder 10 in which virgin aggregate, recycle material and liquid asphalt are mixed to produce an asphaltic composition and the hot gas stream for heating and drying the materials flow in countercur... | 11/29/1988 |
| 4738539 | Process and device for fabricating bituminous coated products from aggregates enclosing a large quantity of fines Process and device for fabricating bituminous coated products from aggregates enclosing a large quantity of fines, using a drying-mixing drum having a case (1) provided internally with fins of which some effect a complete raising of the aggregates in a dr... | 04/19/1988 |
| 4616934 | Drum mix asphalt plant with knock-out box and separate coater Asphalt plant apparatus comprising a drum dryer, a collection chamber or "knock-out box," a "baghouse," and a separate pugmill coater disposed directly underneath the collection chamber so that dust particles which settle out of the airstream in the colle... | 10/14/1986 |
| 4522498 | Asphaltic concrete recycle apparatus and method An apparatus for recycling asphaltic concrete comprises an elongated rotatable drum in which composition is introduced at a first end and recovered at the opposite second end, and having a burner extending into the drum so that the burner nozzle is locate... | 06/11/1985 |
| 4519711 | Drum mixer and method The productive capacity of a drum heater and mixer for asphalt paving composition intended for processing recycled materials can be increased substantially by spraying a curtain of water vertically into the pathway of the raw material as it falls into the... | 05/28/1985 |
| 4504149 | Closed end drum asphaltic concrete recycle apparatus and method Apparatus for recycling asphaltic concrete comprises an elongated drum having a first, open end, through which hot gases of combustion are directed and product is concurrently recovered, and a second, opposite end, through which composition to be treated ... | 03/12/1985 |
| 4481039 | Method for recycling asphaltic concrete An improved process for recycling asphaltic concrete comprises introducing asphaltic concrete particles at one end of an elongated rotating drum while supplying flame and hot gases of combustion to the drum at the opposite end, and introducing virgin aggr... | 11/06/1984 |
| 4439040 | Recycling apparatus for particulate asphaltic concrete An improved recycling apparatus for particulate asphaltic concrete comprises a rotatable drum in which the particulate composition is gradually heated between an input end and an output end having a retractable chute extending into a port at the output en... | 03/27/1984 |
| 4411530 | System and method for rapid beneficiation of Bentonite clay A system and method for rapid beneficiation of bentonite clay is disclosed. Beneficiation of the bentonite clay occurs through oxidation of structural ferrous iron. For rapid beneficiation, bentonite clay, preferably ground, is subjected to moist air whil... | 10/25/1983 |
| 4408985 | Method of fixing hazardous substances in waste foundry sand A method is disclosed for fixing certain dangerous substances into recyclable waste foundry sand so that they are less likely to leach out into the environment. The method uses a roasting process which causes the dangerous substances to form insoluble com... | 10/11/1983 |
| 4387996 | Batch method of recycling asphaltic concrete A batch method of producing asphalt-aggregate composition having a temperature of at least about 200° F. and at least about 20% used asphaltic concrete comprises heating solid particles of the used material in a first drum to a temperature of at least ab... | 06/14/1983 |
| 4332478 | Method and apparatus for reducing smoke emissions in an asphalt drum mixer A method and apparatus are disclosed which reduce smoke emissions in an asphalt drum mixer. A drum mixer heats virgin aggregate to a relatively high temperature in a first drying zone. Virgin asphalt and, in some cases, recycled pavement material containi... | 06/01/1982 |
