Filter for air handling equipment
US4627863A · kind A · utility
Inventor
Key dates
| Filing date | Jul 31, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Jul 31, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter apparatus for air handling systems in which the air inlet grille of the system is provided with an additional filtration medium which extends across the full flow passage area of the grille. In the preferred form of the invention, the filter medium is in the form of a flexible sheet material wrapped on a hollow core shell which is housed in a storage enclosure along side the grille. The sheet filter medium is drawn out from the storage chamber through a discharge slot across the full length of the grille, and suitable guide means is provided to assure proper positioning of the filter medium to cover the entire flow passage area of the grille. The mounting of the roll in the storage chamber is such as to provide a frictional engagement which permits the roll to rotate to pay off the filter medium, but with sufficient friction to avoid overrunning. The filter medium is preferably one of those disclosed in U.S. Pat. Nos. 4,239,516 and 4,239,278.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.