US3862903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit filter retaining means
Assignee: American Air Filter Co Inc
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Filing: 1973-05-14
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Granted: 1975-01-28
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Expires: 1993-05-14
Abstract
Abstract A removable U-shaped filter retaining apparatus adapted to hold a unit filter in air tight relationship within a flow-through housing, one leg of the filter retaining apparatus being a biased wing portion which exerts constant pressure on the frame of a filter received by the retaining apparatus, the other leg of the filter retaining apparatus being an elongate channel member adapted to be attached to the filter housing. The biased wing portion further enables the filter retaining apparatus to accommodate filters of varying dimensions and provides for the filters to be easily inserted and removed from the housing.
Inventors
- 👤 Allan R Getzin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:24
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D2265/00; B01D2265/02; B01D2265/028; B01D2265/04; B01D2265/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A unit filter retaining apparatus adapted to be received in a flow-through housing comprising: a U-shaped body portion, one leg of said body portion being a resilient, inclined wing portion constructed to abut and urge the frame of a unit filter toward said flow-through housing and into sealing relationship when positioned in said flow-through housing; and, the other leg being an elongate channel portion having first and second essentially spaced parallel legs, said channel portion being adapted to receive an edge of said flow-through housing thereby attaching said retaining apparatus to said housing.
Claim 2
Dependent Claim
93 words
A unit filter retaining apparatus adapted to be received in a flow-through housing comprising: a U-shaped body portion, one leg of said body portion being a resilient, inclined wing portion constructed to abut and urge the frame of a unit filter toward said flow-through housing and into sealing relationship when positioned in said flow-through housing; and, the other leg being an elongate channel portion having first and second essentially spaced parallel legs, said channel portion being adapted to receive an edge of said flow-through housing thereby attaching said retaining apparatus to said housing.
Claim 3
Dependent Claim
24 words
The filter retaining apparatus of claim 1 wherein said body portion is integral with said first essentially parallel leg of said elongate channel portion.
Claim 4
Dependent Claim
36 words
The filter retaining apparatus of claim 2 wherein said elongate channel portion includes an inwardly curved portion contiguous with said second parallel leg to enhance the attachment of said filter retaining apparatus to said filter frame.
Claim 5
Dependent Claim
26 words
The filter retaining apparatus of claim 1 wherein said elongate channel portion opens in opposite direction to the direction of opening of said U-shaped body portion.
Claim 6
Dependent Claim
60 words
The filter retaining apparatus of claim 1 comprising at least two inclined edges located on said resilient inclined wing portion one of which is constructed to center a unit filter as it is being positioned in said flow-through housing and the other constructed to hold said unit filter in a centered condition after it has been positioned in said housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |