Barber-Greene Company

Asphalt Product Technologies

Robert E Farnham

Fredric W Prill

Frederic W Prill

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 back (13) for discharging the heated aggregate and for permitting the introduction of air. A burner (41) adjacent the back (13) introduces a flame and heat into the dryer drum (11). A longitudinal air conduit (22) is formed by a stationary annular shroud (20) around the back portion of the dryer drum (11) that extends longitudinally beyond the dryer drum back end (13). The shroud (20) includes two controllable discharge openings (24,25). The assembly (10) further includes a separate rotatable cylindrical mixer drum (51) having a materials inlet (54) for receiving the aggregate discharged from the dryer drum (11), reclaimed asphalt pavement, liquid asphalt and fines and a discharge opening (58) for discharging asphalt. A scavenger fan ( 95) is disposed generally between the two drums (11,51). Each drum (11,51) further includes a plurality of longitudinally and radially projecting paddles (28,32) attached to each's back end (13,53).

Asphalt manufacturing assembly

An apparatus for remediating soil contaminated with combustible pollutants comprising means for initially heating the contaminated soil to a temperature sufficient to vaporize contaminants present therein, means for feeding the contaminated soil to the initial heating means, means for reheating gases created by vaporizing the contaminants, means for introducing the gases to the reheating means, means for cooling the gases, means for removing particulate matter from the gases, and means for exhausting the gases to the atmosphere.

Soil remediation apparatus and method for same

A trunnion assembly (10) for adjusting a rotating cylindrical container (16) having a circumferential tire (7) is disclosed. The assembly (10) includes a rotating roller (11) supported between a pair of brackets with bearings (12) that are attached to a first base plate (13A) pivotally supported on a second fixed base plate (13B). An elongated arm (14) is secured to the first base plate (13A) at one end and secured to a guide base plate (15) at the other end. A pair of spaced guide rollers (16) are mounted on the guide base plate (15). The circumferential tire (7) is positioned between the guide rollers (16) and the rollers (16) are positioned within a barrier assembly (20).

Self-adjusting trunnion assembly

A counterflow drum mixer producing less undesirable hydrocarbon gases and capable of more efficiently drying virgin aggregate. The drum mixer has a rotatable drum with first end receiving virgin aggregate and second end removing combined aggregate, reclaimed paving material, and mixed liquid asphalt. A burner projects into the drum from the outlet end and directs hot gases toward the inlet end. A reclaimed asphalt pavement inlet and a liquid asphalt inlet are located within the drum at a point isolated from the hot gases produced by the burner by a burner shield. When the drum mixer is operating, virgin aggregate moves down the drum toward the outlet counterflow to the drying hot gases projected toward the aggregate inlet by the burner. Reclaimed asphalt pavement is entered into the drum at a point behind the burner shield downstream (with respect to the flow of material) from the burner head producing the hot gases and is not exposed directly to those gases. Similarly, the liquid asphalt enters the drum in an inlet downstream of the burner shield, and fines may be mixed with the liquid asphalt at a mixing box. Less hydrocarbons are produced by this apparatus and method because the asphalt contained in the reclaimed asphalt paving material and the liquid asphalt are not directly exposed to radiation or the hot gases coming from the burner. The small amount of hydrocarbons produced are flowed into the burner to be incinerated.

Counterflow asphalt drum mixer producing less hydrocarbon emissions and

A system to detect partial or complete failure of an accurate meter measuring the flow of a liquid by using a sensor to measure the displacement of the pump as a back-up measurement. A computer is used to compare the feedback from the pump sensor with the meter reading, and if the difference between the two flow measurements is greater than a predetermined amount, an alarm will ring, the meter measurement will be ignored, the system shut down, or some other corrective action instituted by the computer. Redundancy is added to the system without the expense of obtaining an additional precision meter.

Safety back-up for metering pump control

The bottom end of a portable silo and elevator are each hingedly mounted to a base. The lower end of a mast is pivotally disposed in juxtaposition with said base and the upper end of the mast carries block and tackle means coupled to the silo and elevator for hingedly raising the same about the base.

Growing community of inventors

Naperville, IL, United States of America

Robert E Farnham