US5064453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter system
Assignee: International Air Filter Inc
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Filing: 1989-11-30
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Granted: 1991-11-12
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Expires: 2009-11-30
Abstract
Abstract This disclosure relates to a filter system with refillable filter beds containing filter media. The media is drained from the filter beds through filter media outlets located directly under the refillable filter beds. The filter media is kept below desorption temperature by opening a bypass air inlet and using a blower.
Inventors
- 👤 William W. Jacquish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:13
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0446; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/70; B01D2257/708; B01D2258/00; B01D2258/02; B01D2258/0258; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40084; B01D2259/41
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
An air filter system comprising: a housing; a main airflow inlet; a main airflow outlet; at least one prefilter; at least one refillable filter bed; a filter media outlet; a filter media inlet; a bypass airflow inlet; a bypass airflow inlet valve; a blower; and a thermostat; said filter media outlet being located directly below said refillable filter bed and operable to drain said refillable filter bed when said filter media outlet is open; said filter media inlet being located above said refillable filter beds and operable to add filter media to said refillable filter beds; said filter media outlet including closure means closing said filter media outlet when said air filter system if filtering air; said refillable filter bed containing a filter media; said filter media having a desorption temperature; said refillable filter bed having a filter bed temperature; and said thermostat opening said bypass airflow inlet valve when said filter bed temperature is near said description temperature.
Claim 2
Dependent Claim
159 words
An air filter system comprising: a housing; a main airflow inlet; a main airflow outlet; at least one prefilter; at least one refillable filter bed; a filter media outlet; a filter media inlet; a bypass airflow inlet; a bypass airflow inlet valve; a blower; and a thermostat; said filter media outlet being located directly below said refillable filter bed and operable to drain said refillable filter bed when said filter media outlet is open; said filter media inlet being located above said refillable filter beds and operable to add filter media to said refillable filter beds; said filter media outlet including closure means closing said filter media outlet when said air filter system if filtering air; said refillable filter bed containing a filter media; said filter media having a desorption temperature; said refillable filter bed having a filter bed temperature; and said thermostat opening said bypass airflow inlet valve when said filter bed temperature is near said description temperature.
Claim 3
Dependent Claim
52 words
The air filter system of claim 1, further including: a thermostat; wherein said filter beds contain a filter media; said refillable filter beds have a filter bed temperature; said filter media has a desorption temperature; and said thermostat starts said blower when said temperature in filter bed is near said desorption temperature.
Claim 4
Dependent Claim
13 words
The air filter system of claim 1, further including: an energy recovery device.
Claim 5
Dependent Claim
27 words
The air filter system of claim 1 wherein: said filter media inlet includes closure means closing said filter media inlet when said filter system is filtering air.
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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) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |