US4304739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaners
Assignee: Individual
•
Filing: 1979-12-06
•
Granted: 1981-12-08
•
Expires: 1999-12-06
Abstract
Abstract An air cleaner suitable for vehicles, ships, mines and tunnels has a tank for cleaning liquid, an extensible or flexible feed tube for air, and means for maintaining the outlet of the feed tube at the level of the cleaning liquid. The outlet is preferably floated on the cleaning liquid, rounded or circular in plan view, divided into chambers and provided with a depending skirt with an indented edge to help in maintaining the outlet upright by allowing the escape of gas and its exchange between compartments. More than one air feed tube may be provided.
Inventors
- 👤 John Thorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:50
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/021; E; E21; E21F; E21F5/00; E21F5/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
An air cleaner for contacting air with a cleaning liquid, comprising: a tank; a cleaning liquid contained in said tank and having an upper surface within said tank; an extensible feed tube having an outlet within said tank; means for drawing air through said feed tube; means for maintaining said outlet substantially at the surface of said cleaning liquid; and at least one vertically disposed sheet positioned and arranged with respect to said outlet and extending into said cleaning liquid surface to separate said outlet into plural chambers for stabilizing the outlet over the liquid.
Claim 2
Dependent Claim
95 words
An air cleaner for contacting air with a cleaning liquid, comprising: a tank; a cleaning liquid contained in said tank and having an upper surface within said tank; an extensible feed tube having an outlet within said tank; means for drawing air through said feed tube; means for maintaining said outlet substantially at the surface of said cleaning liquid; and at least one vertically disposed sheet positioned and arranged with respect to said outlet and extending into said cleaning liquid surface to separate said outlet into plural chambers for stabilizing the outlet over the liquid.
Claim 3
Dependent Claim
26 words
The air cleaner of claim 7, wherein said feed tube is divided at its outlet end into plural tubes, each communicating with one of said chambers.
Claim 4
Dependent Claim
33 words
The air cleaner of claim 7, wherein said means for maintaining the outlet at the level of the cleaning liquid comprises means for floating the outlet at the surface of the cleaning liquid.
Claim 5
Dependent Claim
33 words
The air cleaner of claim 8, wherein said means for maintaining the outlet at the level of the cleaning liquid comprises means for floating the outlet at the surface of the cleaning liquid.
Claim 6
Dependent Claim
26 words
The air cleaner of claim 7, 8, 9, or 10 wherein said outlet has a peripheral skirt having circumferentially spaced indentations along the lower margin thereof.
References Cited (Backward Citations)
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Cited
US773784A
Cited
US1064102A
Cited
US1447336A
Cited
FR1006412A
Cited
GB1037789A
Cited
DE1200995B
Cited
US3618298A
Cited
US4224042A
Cited
US4182617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |