Cmi Limited

Other

David L Garbelman

Arthur G Shaw

George W Swisher, Jr

William H Minor

Paul E Bracegirdle

Herbert E Jakob

Stuart W Murray

Raymond E Montgomery

An improved ceramic tile conveyor is provided having a pair of guide plates extending substantially the length of the conveyor. The guide plates provide an impact barrier protecting the ceramic tile from damage caused by contact with the revolving flights of the slat conveyor.

Ceramic tile conveyor

This application discloses several components relating to a heating apparatus which preferably are used in conjunction with each other in an apparatus for heating solid granular or particulate material, such as aggregate used to make asphalt concrete. One component of the present invention includes a heater-condenser unit which indirectly heats the material by circulating heat transfer fluid within hollow plates contained in a housing holding the material. The material is heated, the heat transfer fluid is condensed and a condensate removal means associated with the hollow plates removes the condensate from the housing. The heat transfer fluid used in the heater-condenser preferably is supplied in the form of a vapor or gas evolved from liquid contained in material heated by another type of heater. In this other type of heater, the material to be dried enters a chamber containing hollow heat exchange plates through which a primary heat transfer fluid is circulating. The material is heated to a temperature at which the liquid is evaporated and the evolved vapor is collected within the heater, routed through an accumulating apparatus and transferred out of the heater to the heater-condenser. Other components associated with the present invention include a material flow control apparatus to be attached to the bottom of a bottom discharging solid material containing hopper. The flow control apparatus includes a plurality of bars adjustably extending into the hopper.

Heating and/or drying apparatus

Annular lands are mounted on the inner periphery of the tubular shell of a drum for an asphalt mixing apparatus of the type wherein the drum is disposed on a slant and rotated so that flighting arranged about the inner periphery of the drum lifts and drops aggregate and asphalt across the drum to transport the aggregate and asphalt toward the lower end of the drum. Portions of the flighting are mounted in the inner periphery of the shell and portions are mounted on the annular lands. The lands reduce the inside diameter of the drum in selected regions thereof to establish differing advance rates of aggregate and asphalt through the drum in different regions thereof so as to selectively vary the density of veils of asphalt and aggregate across the drum with axial location within the drum.

Drum for an asphalt mixing apparatus

An improved method and apparatus for producing hot mix asphalt wherein flights provided in a mixer drum for cascading aggregate and asphalt across the mixer drum are constructed to establish a plurality of cascade zones, having differing cascade densities, in different portions of the mixer drum. High density cascade zones are provided to maximize the transfer of heat to aggregate; to shield cooler portions of the drum from hotter portions thereof, and to capture fines which would otherwise pass through the drum.

Method and apparatus for establishing aggregate cascade zones in an

An improved method and apparatus for producing hot mix asphalt utilizing new aggregate and a previously manufactured and laid asphalt mix which has been reduced to form recyclable aggregate, wherein the new aggregate is fed into the input end of a rotating mixer drum and cascaded repeatedly through a flame extending from the input end of the mixer drum to a first medial portion thereof and the recyclable aggregate is fed radially into the mixer drum at a second medial portion thereof intermediate the first medial portion and the output end of the mixer drum, the new aggregate shielding the mixer drum from the flame and confining the flame to the portion of the mixer drum between the input end and the first medial portion thereof.

Method and apparatus for producing hot mix asphalt utilizing recyclable

Apparatus for producing hot mix asphalt utilizing new aggregate and a previously manufactured and layed asphalt mix which has been reduced to form recyclable aggregate, comprising a cylindrical mixer drum supported for rotation about its longitudinal axis, a burner assembly for producing a flame in the drum extending from a first end of the drum to a medial portion thereof, a conveyor assembly extending from a second end of the drum to a medial portion thereof for feeding the recyclable aggregate into a medial portion of the drum, means for feeding the new aggregate into the first end of the drum and for injecting asphaltic oil into the drum, the drum being provided with a plurality of mixing flights for mixing the asphaltic oil, new aggregate and recyclable aggregate for discharge as a hot mix asphalt from the second end of the drum.

Growing community of inventors

Edmond, OK, United States of America

David L Garbelman