HEPA filter for venting chambers
US5814118A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1996 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Nov 18, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2265/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A high quality HEPA filter is used in a vent for venting a chamber containing a radioactive material such as a plutonium slurry. The filter element includes a stainless steel wire mesh tube which supports a sintered stainless steel filter media thereon. The wire mesh tube has a stainless steel end plate completely closing one end thereof and a stainless steel end plate with an exhaust outlet opening at the other end. The outlet opening communicates with a hollow core defined by the stainless steel wire mesh tube. The sintered stainless steel filter media has its longitudinal edges joined by a tungsten inert gas weld and is also welded directly to the end plates by completely closed circular welds. An annular housing of stainless steel surrounds the filter element in spaced relation thereto and has an axial inlet. The gas to be filtered flows into the inlet, around the filter element and through the sintered stainless steel filter media before exiting through the exhaust outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.