US5141706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air purification unit
Assignee: Individual
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Filing: 1989-06-30
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Granted: 1992-08-25
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Expires: 2009-06-30
Abstract
Abstract An air purification unit including a housing of substantially rectangular solid configuration and having an inlet and an outlet, a diagonal partition in the housing dividing it into substantially equal inlet and outlet chambers, first filters in communication with the inlet chamber for removing gases and particulate matter entering the inlet chamber, second filters in communication with the outlet chamber for removing submicron particles, and a specialized motorized impeller mounted on the diagonal partition for moving air from the inlet chamber to the outlet chamber, the motorized impeller including a stationary inlet ring secured to the partition, a stationary motor housing portion fixed relative to the partition and a rotatable motor housing portion carrying a backwardly rotatable impeller wheel for drawing air through the center of the impeller wheel as it rotates and forcing it radially outwardly through the impeller wheel to thereby pressurize air in the outlet chamber.
Inventors
- 👤 Donald L. Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:11
CPC Classifications
A; A62; A62B; A62B11/00; F; F24; F24F; F24F8/00; F24F8/10; F24F8/108; F24F8/15; F24F8/158
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
231 words
An air purification unit comprising a housing of substantially rectangular configuration including a plurality of sides, an air inlet in one of said sides, an air outlet in another of said sides, a diagonal partition in said housing dividing said housing into an air inlet chamber in communication with said air inlet and an air outlet chamber in communication with said air outlet, an opening in said partition, filter means in said housing for purifying air passing therethrough, and a motorized impeller assembly effectively mounted on said partition for moving air from said inlet chamber to said outlet chamber through said opening and pressurizing air in said outlet chamber and forcing air from said outlet chamber through said air outlet, said motorized impeller assembly including a rotatable fan housing portion and a stationary housing portion, bracket means secured to said stationary housing portion for fixedly mounting said impeller in said air outlet chamber, a shroud, means fixedly mounting said shroud at said opening for guiding air passing from said inlet chamber to said outlet chamber through said opening, an impeller fixedly secured to said rotatable fan housing portion, said impeller including an inlet shroud located in contiguous relationship to said shroud for receiving air from said shroud, said impeller also including a plate spaced from said inlet shroud and a plurality of blades affixed between said inlet shroud and said plate.
Claim 2
Dependent Claim
231 words
An air purification unit comprising a housing of substantially rectangular configuration including a plurality of sides, an air inlet in one of said sides, an air outlet in another of said sides, a diagonal partition in said housing dividing said housing into an air inlet chamber in communication with said air inlet and an air outlet chamber in communication with said air outlet, an opening in said partition, filter means in said housing for purifying air passing therethrough, and a motorized impeller assembly effectively mounted on said partition for moving air from said inlet chamber to said outlet chamber through said opening and pressurizing air in said outlet chamber and forcing air from said outlet chamber through said air outlet, said motorized impeller assembly including a rotatable fan housing portion and a stationary housing portion, bracket means secured to said stationary housing portion for fixedly mounting said impeller in said air outlet chamber, a shroud, means fixedly mounting said shroud at said opening for guiding air passing from said inlet chamber to said outlet chamber through said opening, an impeller fixedly secured to said rotatable fan housing portion, said impeller including an inlet shroud located in contiguous relationship to said shroud for receiving air from said shroud, said impeller also including a plate spaced from said inlet shroud and a plurality of blades affixed between said inlet shroud and said plate.
Claim 3
Dependent Claim
21 words
An air purification unit as set forth in claim 1 wherein said inlet and outlet chambers are of substantially equal size.
Claim 4
Dependent Claim
30 words
An air purification unit as set forth in claim 1 wherein said filter means includes first filter means in said air inlet, and second filter means in said air outlet.
Claim 5
Dependent Claim
46 words
An air purification unit as set forth in claim 3 wherein said housing includes a top side and a front side adjacent thereto, and wherein said air inlet is in said top side of said housing, and wherein said air outlet is in said front side.
Claim 6
Dependent Claim
23 words
An air purification unit as set forth in claim 4 wherein said first filter means includes a tray of pelletized air purifying material.
Claim 7
Dependent Claim
21 words
An air purification unit as set forth in claim 5 wherein said first filter means includes material for trapping particulate matter.
Claim 8
Dependent Claim
21 words
An air purification unit as set forth in claim 6 wherein said second filter means comprises a high efficiency particulate filter.
Claim 9
Dependent Claim
27 words
An air purification unit as set forth in claim 7 wherein said air outlet includes a grille for moving the outlet air in a substantially columnar shape.
Claim 10
Dependent Claim
46 words
An air purification unit as set forth in claim 1 wherein said housing includes a top side and a front side adjacent thereto, and wherein said air inlet is in said top side of said housing, and wherein said air outlet is in said front side.
Claim 11
Dependent Claim
119 words
An air purification unit comprising a housing including a top side and a front side, an air inlet in said top side, an air outlet in said front side oriented at substantially 90° to said air inlet, a diagonal partition in said housing dividing said housing into an air inlet chamber in communication with said air inlet and an air outlet chamber in communication with said air outlet, filter means in said housing for purifying air passing therethrough, and air moving means effectively mounted on said partition for moving air from said inlet chamber to said outlet chamber and pressurizing air in said outlet chamber and forcing air from said outlet chamber through said outlet substantially only by pressure.
Claim 12
Dependent Claim
119 words
An air purification unit comprising a housing including a top side and a front side, an air inlet in said top side, an air outlet in said front side oriented at substantially 90° to said air inlet, a diagonal partition in said housing dividing said housing into an air inlet chamber in communication with said air inlet and an air outlet chamber in communication with said air outlet, filter means in said housing for purifying air passing therethrough, and air moving means effectively mounted on said partition for moving air from said inlet chamber to said outlet chamber and pressurizing air in said outlet chamber and forcing air from said outlet chamber through said outlet substantially only by pressure.
Claim 13
Dependent Claim
21 words
An air purification unit as set forth in claim 10 wherein said inlet and outlet chambers are of substantially equal size.
Claim 14
Dependent Claim
30 words
An air purification unit as set forth in claim 10 wherein said filter means comprise first filter means in said air inlet, and second filter means in said air outlet.
Claim 15
Dependent Claim
23 words
An air purification unit as set forth in claim 12 wherein said first filter means comprises a tray of pelletized air purifying material.
Claim 16
Dependent Claim
21 words
An air purification unit as set forth in claim 13 wherein said first filter means includes material for trapping particulate matter.
Claim 17
Dependent Claim
21 words
An air purification unit as set forth in claim 14 wherein said second filter means comprises a high efficiency particulate filter.
Claim 18
Dependent Claim
111 words
An air purification unit comprising a housing including a plurality of sides, an air inlet in one of said sides, an air outlet in another of said sides, a diagonal partition in said housing dividing said housing into an air inlet chamber in communication with said air inlet and an air outlet chamber in communication with said air outlet, filter means in said housing for purifying air passing therethrough, and air moving means effectively mounted on said diagonal partition for moving air from said inlet chamber to said outlet chamber and pressurizing air in said outlet chamber and forcing air from said outlet chamber through said outlet substantially only by pressure.
Claim 19
Dependent Claim
111 words
An air purification unit comprising a housing including a plurality of sides, an air inlet in one of said sides, an air outlet in another of said sides, a diagonal partition in said housing dividing said housing into an air inlet chamber in communication with said air inlet and an air outlet chamber in communication with said air outlet, filter means in said housing for purifying air passing therethrough, and air moving means effectively mounted on said diagonal partition for moving air from said inlet chamber to said outlet chamber and pressurizing air in said outlet chamber and forcing air from said outlet chamber through said outlet substantially only by pressure.
Claim 20
Dependent Claim
21 words
An air purification unit as set forth in claim 16 wherein said inlet and outlet chambers are of substantially equal size.
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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) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |