Dual element air filter
US4129429A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1977 |
| Grant date | Dec 12, 1978 |
| Priority date | — |
| Expiry date | Jun 30, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2275/205
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air filter for filtering particulate matter from air flowing therethrough to a point of use requiring clean air, includes an imperforate front wall, a perforate back wall and opposite, imperforate side walls. The front wall is smaller in height than the back wall and a pair of pleated filter elements extend from the top of the front wall to the top of the back wall and from the bottom of the front wall to the bottom of the back wall, respectively, defining a wedge-shaped outlet space between the filter elements extending from the front wall to the back wall and being larger toward the back wall. A plurality of the filters are adapted to be stacked one on top of the other to define a plurality of inlet spaces therebetween and a plurality of outlet spaces. Reinforcing members are interposed between the filter elements in each filter, whereby the filter is enabled to support the weight of a man thereon. The filter is thus simple and rugged in construction and provides a large filtration area in a minimum amount of space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.