Feed hopper for providing preheated aggregate material
US5291876A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1991 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Oct 7, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for feeding preheated aggregate material, such as for the production of asphalt. A feed hopper includes a heater within its interior and positioned adjacent a slotted discharge opening at the lower end of the hopper. A tent-like cover is positioned above the heater to deflect aggregate material from contacting the upper portion of the heater and to transfer heat to the aggregate material in a uniform and efficient manner. The heater may preferably be a gas-fired radiant heater extending lengthwise parallel to and for the full length of the slotted discharge opening. A series of hoppers may be arranged in side-by-side relation and a common conveyor positioned beneath the individual feed conveyors of each hopper to direct the preheated aggregate material to a subsequent processing apparatus, such as a drum mixer or other dryer, used for the production of asphalt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.