Dust collector
US4789387A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1983 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Nov 14, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/313
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention provides a filter apparatus for use in air pollution control which includes at least one hollow filter assembly disposed in a hopper and having an open upper end registering with a wall opening. Contaminated air is introduced into the hopper through an inlet and is caused to flow into an exhaust chamber through the filter and the opening. The filter apparatus includes an end plate supporting the filter assembly and sealing the lower end of the filter assembly. The filter apparatus also includes a nozzle spaced above the filter assembly for selectively directing a reverse pulse of air into the open upper end of the filter such that the reverse air pulse enters the filter assembly and flows through the filter medium in the reverse of the direction of contaminated airflow to thereby remove accumulated contaminants from the filter medium. The nozzle is constructed such that the air pulses emitted from the nozzle propagate toward the wall opening in a cone-shaped pattern with the base of the cone engaging the wall at the wall opening and surrounding the open end of the filter, and such that the air pulses propagate downwardly into the filter assembly and impinge directly u…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.