Air filter assembly
US4701196A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/31
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air filter assembly (1) includes an outer casing (6) having end, rear and downstream portions which are generally planular and thus easily settable on the floor during installation, with the downstream portion being mountable flush to a furnace (3) or the like. An inner filter-holding drawer (7) is provided for easy insertion and removal from the open front casing portion. At least one end wall (10, 11) of the casing is provided with a springable latch (34) adjacent the casing front opening and which snappingly engages and holds a cover (9)in place when the drawer is within the casing. The drawer end walls (44, 45) include external grooves (52) which slide over rails (56) correspondingly mounted internally of the casing side walls. The tolerances are such that the grooves are wider than the rails. Protrusions (59) are disposed on the downstream sides of the rail rear end portions and are engaged by the downstream groove edges (55) as the drawer reaches its rearmost position, thus forcing the drawer's rear end portion downstream so that the grooves' rear upstream edges (54) move into sealing engagement with the upstream rear end portions (57) of the rails. A cam (60) is disposed …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.