Back to results
US 5,312,465 AGranted
Filtration apparatus with bag-like plenum chamber
AssigneeNone recorded
InventorRaine Riutta
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNone recorded
InventorRaine Riutta
Estimating the term…
An air filtering apparatus includes a fan body having an air intake and an air outlet. There is a fan within the body which draws air into the intake and forces it out of the outlet. There is at least one air filter between the intake and the outlet. A plenum chamber is connected to the fan body about the air outlet. The plenum chamber is a flexible bag of a sheet-like material which is inflated by air forced out of the outlet of the fan body. At least a portion of the plenum chamber is an air diffuser for air exiting the apparatus. The diffuser is more permeable than the filter.
An air filtering apparatus, comprising
An air filter apparatus, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
For discharging the filtered gas: containing fixed gas displacement elements or cores
Filters or filtering processes specially modified for separating dispersed particles from gases or vapours: particle separators, e.g. dust…
By separation, e.g. by filtering: using dry filter elements
Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser: formed as perforated walls, ceilings or floors
Term ended 12 Mar 2013 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The invention relates to air filters, particularly portable air filtration apparatuses intended to filter dust in industrial and commercial establishments.
2. Description of Related Art
In the drawings:
FIG. 1 is a front, side isometric view of an air filtering apparatus according to a first embodiment of the invention;
FIG. 2 is a rear, side isometric view thereof with the fan body partly broken away to show interior components thereof; and
Referring first to FIG. 1 and FIG. 2, these show a filtering apparatus generally at 10. The apparatus includes a fan body 12 having four sides 14, 16, 18 and 20. The mid section of each side is a closed panel, such as panel 22 on side 14. Each such panel is rectangular in this embodiment and made of sheet metal although alternative materials could be used instead. The upper portion of each side has a second panel, such as panel 24 on side 14. This panel is rectangular in this embodiment and of rigid, transparent acrylic, although alternative materials could be employed. Panel 24 and the corresponding panels on the other sides form a single member 26 extending about top 28 of the fan body 12.
The lower portion of the fan body has an air intake, shown generally at 30, which is formed by four air filters 32, one on each of the sides. These air filters serve as primary air filters for the air drawn in through the intake of the apparatus. Each of the air filters 32 is generally rectangular in shape and may be pleated. In this instance a Type DP sold under the trade mark AIRGUARD is used. This is manufactured by Airguard Industries, Inc. of Louisville, Ky., U.S.A. Other filters could be substituted.
The unit has a bottom 33 which is closed in this example and includes a dust collecting tray 34 shown in FIG. 2. There is a caster 36 fitted to the apparatus adjacent each corner of the bottom.