Air filter system and method of installation
US6719820B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 12, 2003 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Feb 12, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/31
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A filter retaining apparatus and method for installing a thicker filter in an existing conventional return air duct in a conventional heating and air conditioning system. The filter is commercially available but is thicker than one conventionally used in such systems. A thicker filter provides more efficient air filtration and has a longer life, thus, requires less frequent cleaning or replacement. The retaining apparatus is capable of retaining the thicker filter and is adaptable to the existing return air duct opening without modification of the existing opening or the grill cover. The apparatus has the same length and width dimensions as the existing thin filter and is mounted on the same landing surface. The greater depth of the apparatus extends into the air duct. Thus, from the room interior it is not possible to detect the use of the apparatus. The greater depth of the apparatus retains the thicker commercially available filter. Another embodiment of the retaining apparatus, can be adapted to an existing return air duct that is somewhat shallower in depth while still retaining the commercially available thicker filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.