Leydig, Voit & Mayer, Ltd.
Portable mixer for mixing ground rubber into liquid asphalt
 The mixer includes a cylindrical mixing tube substantially submerged in the liquid asphalt and a paddle assembly extending axially through the mixing tube. An auger drives the ground rubber into an upstream end portion of the mixing tube and into the liquid asphalt therein. The paddle assembly draws the ground rubber and the liquid asphalt from the upstream end portion of the mixing tube and through the mixing tube. In addition, the paddle assembly accelerates the rubber-asphalt mixture as it proceeds through the mixing tube whereupon the mixture is discharged through a downstream end of the mixing tube. The mixing tube is formed with longitudinally spaced openings to allow additional asphalt to enter the mixing tube as the velocity of the mixture increases. Curved plates which are secured to the tips of paddles aligned with the longitudinally spaced openings cover and uncover the openings to prevent the paddles from driving ground rubber and liquid asphalt outwardly through the openings as those paddles rotate past the openings. Shelves located directly upstream of the longitudinally spaced openings direct the flow of the mixture generally away from the openings to further prevent the mixture from flowing outwardly through the openings. 
E. D. Etnyre & Co.
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inventional inventional additional inventional inventional
Thomas R. Patrick C.
Brown O'Brien