US5509948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable two-stage air cleaner
Assignee: Air Maze Corp
•
Filing: 1994-05-06
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Granted: 1996-04-23
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Expires: 2014-05-06
Abstract
Abstract A disposable two-stage air cleaner includes a housing forming an air inlet, a separation chamber, a dirt collection chamber, and an air outlet. A filter element is located between the separation chamber and the air outlet. The air inlet moves the air in a circular pattern in the separation chamber, whereby dirt is thrown outwardly by centrifugal force. An air scavenging system is employed in which air laden with dirt from the first-stage separation chamber is scooped into the dirt collection chamber and air from the dirt collection chamber is allowed to recirculate into the separation chamber after the air flow has been slowed so that the dirt falls from the air stream. The air cleaner thus provides performance which is equal to or better than reusable air cleaners of the prior art.
Inventors
- 👤 Dennis B. Keller
- 👤 Donald R. Denton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:11
CPC Classifications
B; B01; B01D; B01D50/00; B01D50/20; F; F02; F02M; F02M35/00; F02M35/02; F02M35/022; F02M35/024
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
An air cleaner, which comprises: a housing including a separation chamber, an air inlet to the separation chamber, a dirt collection chamber, and an air outlet; a filter element between the separation chamber and the air outlet; a flow director associated with the air inlet for moving the air in a circular pattern in the separation chamber, whereby dirt is thrown outwardly by centrifugal force; and an air scavenging system including a first passage for withdrawing dirt laden air from the separation chamber into a dirt collection chamber, a flow retarder in the dirt collection chamber for slowing the velocity of the dirt laden air entering the dirt collection chamber through the first passage to allow dirt to fall from the air, and a second passage separate from the first passage and located in an annular zone spaced radially inward from said first passage for allowing air in the dirt collection chamber to exit back to the air separation chamber.
Claim 2
Dependent Claim
160 words
An air cleaner, which comprises: a housing including a separation chamber, an air inlet to the separation chamber, a dirt collection chamber, and an air outlet; a filter element between the separation chamber and the air outlet; a flow director associated with the air inlet for moving the air in a circular pattern in the separation chamber, whereby dirt is thrown outwardly by centrifugal force; and an air scavenging system including a first passage for withdrawing dirt laden air from the separation chamber into a dirt collection chamber, a flow retarder in the dirt collection chamber for slowing the velocity of the dirt laden air entering the dirt collection chamber through the first passage to allow dirt to fall from the air, and a second passage separate from the first passage and located in an annular zone spaced radially inward from said first passage for allowing air in the dirt collection chamber to exit back to the air separation chamber.
Claim 3
Dependent Claim
17 words
An air cleaner according to claim 1, wherein the housing is generally cylindrical and includes end caps.
Claim 4
Dependent Claim
22 words
An air cleaner according to claim 2, wherein the end caps have buttons thereon for mounting the air cleaner on a bracket.
Claim 5
Dependent Claim
25 words
An air cleaner according to claim 1, wherein the first passage includes a scoop extending into the air separation chamber in a radially outward position.
Claim 6
Dependent Claim
24 words
An air cleaner according to claim 1, wherein the flow retarder includes a baffle in the dirt collection chamber adjacent to the scavenging system.
References Cited (Backward Citations)
US1864201A
Cited
US1760705A
Cited
US1854010A
Cited
DE849950C
Cited
US3928007A
Cited
US3876400A
Cited
US3898064A
Cited
US4217118A
Cited
US4261710A
Cited
US4350509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-23 | 1999-10-23 | 2000-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-23 | 2003-10-23 | 2004-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-23 | 2007-10-23 | 2008-04-23 | $7700.00 | Window Closed / Lapsed |