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AssigneeFais Inc.
InventorsPieter K. Borkent, Cory Roehm
Estimating the term…
An air filtration system including a pre-filtration unit having a filter section and a spacer section attached to the filter section and extending downstream from the filter section, a pre-filter attachment device having a pre-filter securing section and a first plurality of coupling members, and a filtration unit. The filter section includes a pre-filter. The spacer section includes an at least partially open end located on a downstream side of the spacer section to expose a downstream face of the pre-filter. The filtration unit includes a filter frame, an upper section thereof including an upstream-facing surface having a plurality of openings, a filter secured inside the lower section of filter frame, and a second plurality of coupling members located on the filter frame and coupleable with the first plurality of coupling members of the pre-filter attachment device to removeably secure the pre-filtration unit to the filtration unit.
An air filtration unit comprising:
An air filtration system comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
With multiple filtering elements, characterised by their mutual disposition: connected in series
In multiple arrangements: v-type arrangements
Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material: using folded, pleated material
Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours: non-permanent measures for…
About 4 years 10 months of term left · ends 29 Aug 2031 (estimated)
1. Field of the Invention
The field of the present invention is atmospheric air filtration units, and in particular, an air filtration unit having an air pre-filtration unit and pre-filter attachment device associated therewith for abutting the air pre-filtration unit to the air filtration unit.
2. Background
In the drawings, wherein like reference numerals refer to similar components:
FIG. 1 illustrates an upstream-side perspective view of a filtration unit according to a first embodiment;
FIG. 2 illustrates a downstream-side perspective view of the filtration unit according to the first embodiment;
A pre-filtration unit, filtration unit, and filtration system are illustrated in FIGS. 1-8. Wherever possible, the same reference characters are used in the figures and the description to refer to the same or like parts.
FIGS. 1 and 2 illustrate a filtration unit 10 according to a first embodiment. The filtration unit 10 can be constructed out of molded plastic materials, but may also be constructed out of metal or other suitable materials. The filtration unit 10 is a mini-pleat V-bank box-type air filter having an upstream side 19 that faces an airflow crossing through the filtration unit 10 and a downstream side 18. The filtration unit 10 includes a boxlike plastic filter frame 14 and a filter made up of a plurality of V-shaped mini-pleat pack filter cells 9 (90a-d). The filter frame 14 has an outer structure defined by opposing side panels 40a and 40b, side frame rails 11a and 11b, and rib sections 30a-c. Preferably, an outer rectangular periphery of the filter frame 14, when viewed from an upstream side, is 24 inches by 24 inches, or alternatively 24 inches by 12 inches, and a depth of the filter frame is 12 inches, although these dimensions might vary slightly and other sizes may conceivably be used.
In this embodiment, the side panels 40a and 40b are identical mirror images of each other, W-shaped, and respectively include inner sides 45a and 45b and outer sides 47a and 47b, as further shown in FIGS. 1, 2, 4 and 5. A plurality of V-shaped channels 54 are provided on the inner sides 45a and 45b to enclose and secure V-shaped ends (not depicted) of the V-shaped filter cells 90a-d. The V-shaped channels 54 provided on the inner sides 45a and 45b are connected at an upstream end of the inner sides 45a and 45b to define a continuous zigzagging channel 55 that zigzags along W-shaped ends 46 of the side panels from one upstream corner of the inner sides 45a and 45b to an opposite upstream corner of the inner sides of the side panels 45a and 45b. “Upstream” is defined as describing a position located closer to a source of an airflow, and “downstream” is defined as describing a position located further away from the source of the airflow than the “upstream” position. Similarly, when describing a location, “upper” is defined as describing a position located upstream of a “lower” position.