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| Number | Title | Issue Date |
| 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 |
| 6634780 | Asphalt plant having centralized media burner and low fugitive emissions An asphalt plant includes a plurality of asphalt processing components including a first set of components producing volatile emissions and a second set of components requiring process heat. A separate central burner assembly is adapted to supply heat ene... | 10/21/2003 |
| 6164809 | Counter-flow asphalt plant with independently rotatable dryer and mixer A counter-flow asphalt plant with a separately controlled and operated dryer 50 and mixer 52 in which virgin aggregate, recycle material and liquid asphalt are mixed to produce an asphaltic composition. The dryer 50 is rotated by a variable dryer drive 58... | 12/26/2000 |
| 6146007 | Asphalt plant having centralized media burner and low fugitive emissions An asphalt plant including a plurality of asphalt processing components, with a selected first set of the components producing volatile emissions and a selected second set requiring process heat energy. A central burner assembly is connected to the select... | 11/14/2000 |
| 5735223 | Method for disposing of paper in an asphalt plant An asphalt plant for producing asphalt paving, the asphalt plant including: a) a dryer unit for heating stone aggregate, the dryer unit including a container and a burner for producing a flame to provide thermal energy for heating the stone aggregate in t... | 04/07/1998 |
| 5423606 | Batch asphalt plant having RAP weigh hopper and pugmill scavenging system A designated amount of recycled asphalt product (RAP) is fed to the pugmill of a batch asphalt plant during the production of hot mix asphalt (HMA) at a controlled rate so as not to overload the pugmill scavenging system. The designated amount of RAP is m... | 06/13/1995 |
| 5403085 | Process for introducing material into a treatment device In an apparatus for heating and mixing a particulate material composition, an elongated drum is supported for rotation on a frame and hot gases are supplied to the drum at an output end of the drum and directed toward an input end. An outer shell encircle... | 04/04/1995 |
| 5378060 | Combustion chamber having reduced NOX emissions A combustion chamber having improved heating efficiency and reduced NOx emissions includes a reduced diameter throat and a stepped configuration within the chamber. The chamber configuration encourages efficient combustion to reduce NOx | 01/03/1995 |
| 5294197 | Asphalt manufacturing assembly An asphalt manufacturing assembly (10) is disclosed that includes a rotatable cylindrical dryer drum (11) having an opening (14) in the front (12) for receiving virgin asphalt aggregate and for permitting the exhaust of fumes and an opening (18) in the ba... | 03/15/1994 |
| 5273355 | Aggregate dryer and soil incinerator An apparatus is disclosed which is adapted to heat and dry stone aggregate useful in the production of asphalt paving, and which also has the ability to incinerate contaminated soil. The apparatus comprises a rotary drum for heating and drying the stone a... | 12/28/1993 |
| 5174650 | Dual drum recycle asphalt drying and mixing method and apparatus An asphalt drum drying and mixing plant capable of using recycled pavement aggregate material includes two interacting drums, each being heated to different temperatures. A first drum is a parallel flow drying and mixing drum. The recycled material is int... | 12/29/1992 |
| 5090813 | Dual drum recycle asphalt drying and mixing method and apparatus An asphalt drum drying and mixing plant capable of using recycled pavement aggregate material includes two interacting drums, each being heated to different temperatures. A first drum is a parallel flow drying and mixing drum. The recycled material is int... | 02/25/1992 |
| 5002398 | Apparatus for and methods of producing a hot asphaltic material A continuous process aggregate drying and mixing plant for producing a hot asphaltic material, such as is used for paving highways or the like, includes a combination of a drum drier and a pugmill. Both the drum drier and the pugmill are supported by a co... | 03/26/1991 |
| 4932785 | Aggregate drying system with improved aggregate dryer and mass flow apparatus This invention relates to an improved aggregate drying apparatus and method where the dried aggregate is particularly useful for making hot mix asphalt. In accordance with the system, heat typically lost in exhaust gases and moisture evaporated in a heate... | 06/12/1990 |
| 4910540 | Countercurrent asphalt drum dryer/mixer A drum mixer having a internal combustion gas cylinder extending substantially the length of the drum mixer is provided. Hot combustion gases are generated by a flame within the cylinder. The combustion gases within the cylinder flow in a countercurrent d... | 03/20/1990 |
| 4898472 | Plant of batch system for producing a composite paving material by using a bituminous waste pavement material Disclosed is a plant of batch system for producing a composite paving material by using a bituminous waste pavement material, which comprises a heating means equipped with a new aggregate material introduction shoot and a bituminous waste material introdu... | 02/06/1990 |
| 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 |
| 4695186 | Asphalt handling apparatus Asphalt handling apparatus includes a carriage portion, a hopper portion, a hopper heating portion, an asphalt dispensing portion, a liquid tack material dispensing portion and an equipment lifting portion. The hopper portion includes an elongated trough ... | 09/22/1987 |
| 4579458 | Method and apparatus for the production of asphalt concrete In the batchwise production of asphalt concrete only such aggregate is utilized, as comprises a coarse-grained portion, a fine-grained portion and a filler portion. The coarse-grained portion and the bituminous binder used are mixed in a mixer, and the fi... | 04/01/1986 |
| 4555182 | Apparatus and 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... | 11/26/1985 |
| 4325641 | Conversion tank for recycling asphaltic shingle tabs An apparatus for and a method of recycling asphaltic waste shingles. The apparatus includes an elongated conversion tank into which an asphaltic oil, preferably preheated, and shingle tabs are admitted. The shingle tabs are dissociated into substantially ... | 04/20/1982 |
| 4277180 | Method and apparatus for making bituminous mixtures A bituminous mixture of aggregate and a bituminous binder, especially for road construction or repair is prepared by mixing a batch of still moist aggregate with the bituminous binder in a pressurized mixing container. The gauge pressure in the mixing con... | 07/07/1981 |
| 4155654 | Apparatus for continuous preparation of sulfur asphalt binders and paving compositions Apparatus is disclosed for continuous preparation of a blend of liquid sulfur in fluid asphalt in specified proportions to provide a dispersion of fine sulfur droplets in the asphalt, particularly suitable for coating onto aggregate to form "hot mix" for ... | 05/22/1979 |
| 4136964 | Apparatus for simultaneously mixing and conveying particulate material Apparatus for simultaneously mixing and conveying particulate material, the apparatus comprising a housing having an input end and an output end disposed vertically higher than the input end, means for feeding the particulate material into the input end o... | 01/30/1979 |
| 4096588 | Recycled asphalt-aggregate process and apparatus In a process for recycling asphalt and aggregate containing composition, the improvement comprises separating the composition into a plurality of portions having different particle sizes, ranging from coarse to fine, introducing the particle portions into... | 06/20/1978 |
| 4095285 | Device for the preparation of coated products for construction and maintenance of highways A device for the preparation of coated products, particularly, but not exclusively, for the construction and maintenance of highways, from aggregate, finely divided material and a binder, comprising a cylindrical drum having an inlet end and an outlet end... | 06/13/1978 |
