Portable mixer for mixing ground rubber into liquid asphalt
US5478147A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1995 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Apr 13, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F27/15
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.