Abstract: A locking cam stop conducts rotation from a driving part, such as a tire ring, to a driven part, such as a rotary dryer or kiln. The device utilizes clamping cams with logarithmic profiles to secure the tire ring without welding or direct attachment, only frictional force. The cams provide immediate, powerful holding force in the desired direction, while allowing free counter-rotation when necessary. The device utilizes a tension link to maintain sufficient contact with the tire ring, ensuring that the cams will engage and hold the tire ring when necessary.

Abstract: A cam stop conducts rotation from a driving part, such as a tire ring, to a driven part, such as a rotary dryer or kiln. The cam stop includes a pair of support blocks securable to the driven part, and a cam rod rotatably coupled with the support blocks and extending between the support blocks. The cam rod includes a logarithmic spiral cam profile, and the cam rod is displaceable in a radial direction into engagement with the driving part by rotation according to the logarithmic spiral cam profile. Rotation of the tire ring may be conducted to the rotary drum by frictional engagement between the cam rod and the driving part.

Abstract: A method of making hot mix asphalt using recycled asphalt in which tertiary air is mixed with products of combustion at an exit of a refractory-lined chamber to produce hot controlled temperature process air, the temperature of the tertiary air being increased while the temperature of the products of combustion is decreased to adjust a temperature of the hot controlled temperature process air. Particles of the recycled asphalt are heated by exposing the particles to the hot controlled temperature process air in the rotary counter-flow dryer and mixer and moisture is removed from the recycled asphalt with the hot controlled temperature process air.

Abstract: A highly portable asphalt plant of substantial size and product manufacturing capacity carries the system components on the confines of two transportable vehicles. The two vehicles are arranged in a fashion whereby vehicle one is connected to vehicle two in an inline continuous fashion. Vehicle two contains an integrated inertial dust separator baghouse design and provides for the receiving of the rotary dryer drum mixer directly and without the use, of interconnecting ductwork.

Abstract: A method of making hot mix asphalt using recycled asphalt in which tertiary air is mixed with products of combustion at an exit of a refractory-lined chamber to produce hot controlled temperature process air, the temperature of the tertiary air being increased while the temperature of the products of combustion is decreased to adjust a temperature of the hot controlled temperature process air. Particles of the recycled asphalt are heated by exposing the particles to the hot controlled temperature process air in the rotary counter-flow dryer and mixer and moisture is removed from the recycled asphalt with the hot controlled temperature process air.

Abstract: A storage and discharge apparatus for particulate material includes a silo and a dispensing cone adjacent a lower end of the silo. The dispensing cone is formed in a partial conical shape and includes a fill portion oriented to face the lower end of the silo at a base end of the conical shape and a dispense portion at an apex end of the conical shape. The dispense portion includes extension sections that extend longitudinally outward from the apex end of the conical shape.

Abstract: A storage and discharge apparatus for particulate material includes a silo and a dispensing cone adjacent a lower end of the silo. The dispensing cone is formed in a partial conical shape and includes a fill portion oriented to face the lower end of the silo at a base end of the conical shape and a dispense portion at an apex end of the conical shape. The dispense portion includes extension sections that extend longitudinally outward from the apex end of the conical shape.

Abstract: A low emissions burner includes a diffusion burner surrounded by an annular array of premix burners. The diffusion burner operates at maximum swirl air flow and at a low constant fuel rate to reduce NOx emissions. The diffusion burner provides a stable swirling diffusion flame. An annular array of premix burners surrounds the diffusion burner and provides a non-swirling premix flame about the diffusion flame to advantageously provide a higher heat content about the periphery of the burner flame to facilitate industrial drying processes using the burner. The diffusion burner flame maintains the premixed flame stabilized. Water injection nozzles are provided each of the premix and diffusion burners.

Abstract: The silo includes at least three hoppers terminating in rectilinear discharge openings extending lengthwise transversely of a loading area below the discharge openings. Clam gates are movable between open and closed positions to discharge material. The discharge area at the bottom of the silo is increased, facilitating faster loading of trucks with the particulate material.

Abstract: The underwater electrical generator includes a stator core and counter-rotating turbine blades with permanent magnets in the hubs and windings in the core housing. When tethered by the nose of the housing, the water current rotates the turbine blades generating electrical current which is supplied for commercial use via the tether to a land-based utility. Ballast tanks are provided to maintain the generator at a predetermined depth. Small stator windings and permanent magnets are provided in the rotating hubs and core housing respectively to charge batteries in the hubs for altering the pitch of the blades such that the blades can be feathered for maintenance outages.

Abstract: The underwater electrical generator includes a stator core and counter-rotating turbine blades with permanent magnets in the hubs and windings in the core housing. When tethered by the nose of the housing, the water current rotates the turbine blades generating electrical current which is supplied for commercial use via the tether to a land-based utility. Ballast tanks are provided to maintain the generator at a predetermined depth. Small stator windings and permanent magnets are provided in the rotating hubs and core housing respectively to charge batteries in the hubs for altering the pitch of the blades such that the blades can be feathered for maintenance outages.

Abstract: The silo includes at least three hoppers, each formed by flat inclined plates along opposite sides and ends terminating in rectilinear discharge openings extending lengthwise transversely of a loading area for trucks below the discharge openings. Clam gates are movable between open and closed positions to discharge material into the truck bed. By using flat sided hoppers, the discharge area at the bottom of the silo is increased, facilitating faster loading of trucks with the particulate material.

Abstract: A bag house is mounted on a portable trailer and has a tube sheet with depending filter bags in part defining a first plenum for receiving a gas stream with fines and a second plenum for receiving clean gas from the filter bags. The fines are collected in one or more hoppers below the filter bags. A screw conveyor in each hopper has reverse flighting adjacent opposite ends for conveying separated fines longitudinally along and from adjacent opposite ends toward a central location intermediate the length of the housing. An elevation conveyor having an inlet located in the central location conveys the collected separated fines out of the housing to an external outlet for discharge into a surge operator.

Abstract: A low emissions burner includes a diffusion burner surrounded by an annular array of premix burners. The diffusion burner operates at maximum swirl air flow and at a low constant fuel rate to reduce NOx emissions. The diffusion burner provides a stable swirling diffusion flame. An annular array of premix burners surrounds the diffusion burner and provides a non-swirling premix flame about the diffusion flame to advantageously provide a higher heat content about the periphery of the burner flame to facilitate industrial drying processes using the burner. The diffusion burner flame maintains the premixed flame stabilized. Water injection nozzles are provided each of the premix and diffusion burners.

Abstract: A low emissions burner includes a diffusion burner surrounded by an annular array of premix burners. The diffusion burner operates at maximum swirl air flow and at a low constant fuel rate to reduce NOx emissions. The diffusion burner provides a stable swirling diffusion flame. An annular array of premix burners surrounds the diffusion burner and provides a non-swirling premix flame about the diffusion flame to advantageously provide a higher heat content about the periphery of the burner flame to facilitate industrial drying processes using the burner. The diffusion burner flame maintains the premixed flame stabilized. Water injection nozzles are provided each of the premix and diffusion burners.

Abstract: A inclined rotary drum mixer has flights for forming a veiling pattern of particles across the width of the drum for a substantial axial extent. The drum has a burner for flowing hot gases of combustion in heat transfer contact with the particle or aggregate veil. A diverter or interceptor is disposed in the drum for interrupting the cascading or veiling pattern to define a channel for flow of hot combustion gases free of heat transfer contact with the particles of the veiling pattern. By controlling the magnitude of the channel formed by the interceptor or diverter, the average exhaust gas temperature of the exhaust gases may be controlled.

Abstract: The counterflow drum mixer includes an elevated virgin aggregate inlet end and an opposite asphaltic product discharge end. A burner lies intermediate the ends and defines a combustion volume. Shield flights surround the combustion volume defining an annular chamber with the drum wall. Recycle material is supplied to the annular chamber at the upstream end of the combustion volume for heating by convection and conduction in the annular chamber. The virgin aggregate material flows through a drying zone, into the combustion volume and between the shield flights into the annular chamber for contact with and conductive heating of the recycle material. Radiant heat transfer from the combustion volume along radii of the drum to the annular chamber is prevented.

Abstract: An inclined counterflow rotating drum mixer has a burner head intermediate an aggregate inlet at one end of the drum and an asphaltic concrete discharge at the opposite end of the drum. A fan supplies secondary air to the burner through a motive tube having an opening in communication with a mixing chamber between the burner head and the discharge end of the drum to aspirate gases from the mixing chamber for flow through the burner flame. The aspiration creates a negative pressure in the mixing chamber, causing a reverse flow of a portion of the combustion gases from the dryer chamber into the mixing chamber for preheating RAP input to the mixing chamber. RAP is also preheated by providing a preheat chamber adjacent the flame zone but segregated from direct contact with the flame to preheat the RAP. Hot and dried virgin aggregate is mixed with the RAP in the preheat chamber and valves are provided to prevent gases evolved from the RAP in the preheat chamber from flowing into the drying chamber.

Abstract: An apparatus and method for operating a rotatable drying drum are disclosed herein. The drying drum has a burner for generating hot gases of combustion for flow through the drum to dry aggregate. The drum includes identical drying flights each having a generally U-shaped body having side walls extending from opposite edges of a base and terminating in first and second edges having different configurations and consequent different veiling effects in the dryer by securing the flights in one of a plurality of orientations within the drum. By reorienting the identical flights within the drying zone of the rotary drum dryer, the veiling patterns of the aggregate across the drum may be altered, hence adjusting the exhaust temperature.

Abstract: The storage silo has a frustoconical discharge chute terminating in an annular outlet member having an inflatable bladder about its margin. A gate is movable horizontally and, when in the vicinity of the opening near its closing position, movable both horizontally and vertically into engagement with the margin of the cylindrical wall member. The bladder is then inflated to engage the gate sealing between the outlet and the gate. To open the outlet, the bladder is deflated to a location above the margins of the opening whereby the gate may be moved vertically downwardly and horizontally away from the opening to discharge material from the silo.