Patent US3668840A successfully refreshed from Google Patents.
US3668840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner
Assignee: Individual
•
Filing: 1970-03-06
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Granted: 1972-06-13
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Expires: 1990-03-06
Abstract
Abstract An air cleaner utilizing a series of elongate, inverted U-shaped air foils is disclosed herein. An oil retaining tray is disposed adjacent the air inlet of an enclosure which also has an air outlet. The air foils are disposed in the air inlet above the tray with the legs of the air foils extending downwardly to proximate the top of the tray. A fan is utilized to force air through the air inlet, over the legs of the air foils and then up through the inside of the air foils. Air and particles of dirt entrained in the air are accelerated along the legs of the air foils. The dirt particles attain sufficient inertia to plunge into the oil in the tray where those particles are retained while the clean air passes into the inside of the air foils.
Inventors
- 👤 Richard L Pierick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:41
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/021; F; F24; F24F; F24F8/00; F24F8/10; F24F8/117; F24F8/133; F24F8/80
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
181 words
An air cleaner comprising: an enclosure having an air inlet and an air outlet formed therein; means for forcing air into said enclosure through said air inlet and out of said enclosure through said air outlet; a plurality of liquid retaining means each comprising a removable tray disposed adjacent said air inlet; a plurality of series of air foils disposed in said air inlet each series of air foils aligned above and demountably disposed in one of said liquid retaining means, each of said air foils having an upper portion slanting upwardly from said inlet end to said discharge end and an elongate, inverted U-shaped configuration, and having a closed inlet end and an open discharge end and legs extending downwardly to proximate the top of said respective liquid retaining means, said legs being substantially aligned with the general direction of air flow through said air inlet; and a lateral member affixed to each of said air foils proximate the discharge ends, said member sealing the air inlet of said enclosure except for said open discharge ends of said air foils.
Claim 2
Dependent Claim
181 words
An air cleaner comprising: an enclosure having an air inlet and an air outlet formed therein; means for forcing air into said enclosure through said air inlet and out of said enclosure through said air outlet; a plurality of liquid retaining means each comprising a removable tray disposed adjacent said air inlet; a plurality of series of air foils disposed in said air inlet each series of air foils aligned above and demountably disposed in one of said liquid retaining means, each of said air foils having an upper portion slanting upwardly from said inlet end to said discharge end and an elongate, inverted U-shaped configuration, and having a closed inlet end and an open discharge end and legs extending downwardly to proximate the top of said respective liquid retaining means, said legs being substantially aligned with the general direction of air flow through said air inlet; and a lateral member affixed to each of said air foils proximate the discharge ends, said member sealing the air inlet of said enclosure except for said open discharge ends of said air foils.
Claim 3
Dependent Claim
33 words
The air cleaner of claim 1 wherein said legs extend downwardly into said means for retaining liquids and are substantially parallelly aligned with the general direction of air flow through said air inlet.
Claim 4
Dependent Claim
13 words
The air cleaner of claim 1 wherein said legs extend downwardly and outwardly.
Claim 5
Dependent Claim
29 words
The air cleaner of claim 1 wherein each of said trays has partitions formed therein extending upwardly to proximate the desired liquid level thereby minimizing spills of the liquid.
Claim 6
Dependent Claim
18 words
The air cleaner of claim 1 wherein said means for forcing air through said enclosure is a fan.
Claim 7
Dependent Claim
35 words
The air cleaner of claim 1 wherein a second lateral member is affixed to each series of said air foils proximate the inlet ends and extending upwardly to proximate the top of said air foils.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |