US3984221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elongated retainer strips for fibrous filter batts
Assignee: Industrial Air LLC
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Filing: 1975-09-25
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Granted: 1976-10-05
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Expires: 1995-09-25
Abstract
Abstract An elongated, generally U-shaped in cross-section, retainer strip, of the type which includes longitudinally extending, resilient, confronting semi-walls extending inwardly and downwardly from the free ends of the legs to grip the edges of a fibrous filter mat, includes a pair of exterior flanges. One exterior flange extends in spaced, parallel relation to one of the walls of the retainer strip to mount the retainer strip on a planar portion of a filter frame without rivets or cement. The other exterior flange extends in spaced, parallel relation to another wall of the retainer strip to secure the edges of a conventional screen or mesh backing member eliminating sheet metal tabs.
Inventors
- 👤 Worth Bagley Cotton, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:38
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0005; B01D46/10; B01D46/12; B01D46/121; B01D46/56; B01D46/58
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
205 words
An improved elongated retainer strip for securing a fibrous filter mat and a backing screen to the supporting frame of a filter cell, wherein said elongated gripping strip is of the type generally having a base wall, a pair of side walls extending upwardly from each edge of said base wall and a downwardly and inwardly extending resilient semi-wall depending from the free end of each of said side walls terminating in spaced free edges to define a slot in opposing relationship to said base wall, wherein said improvement comprises: a. a first flange integrally depending from one edge of said base wall and extending in parallel, spaced relation to the outer surface of said base wall and defining a first longitudinally extending trackway between said flange and said base wall for receiving and retaining one of said backing screen and said supporting frame; and b. a second flange integrally depending from one edge of one of said side walls and extending in parallel, spaced relation to the outer surface of said one side wall and defining a second longitudinally extending trackway between said second flange and said one side wall for receiving and retaining the other of said supporting frame and said backing screen.
Claim 2
Dependent Claim
205 words
An improved elongated retainer strip for securing a fibrous filter mat and a backing screen to the supporting frame of a filter cell, wherein said elongated gripping strip is of the type generally having a base wall, a pair of side walls extending upwardly from each edge of said base wall and a downwardly and inwardly extending resilient semi-wall depending from the free end of each of said side walls terminating in spaced free edges to define a slot in opposing relationship to said base wall, wherein said improvement comprises: a. a first flange integrally depending from one edge of said base wall and extending in parallel, spaced relation to the outer surface of said base wall and defining a first longitudinally extending trackway between said flange and said base wall for receiving and retaining one of said backing screen and said supporting frame; and b. a second flange integrally depending from one edge of one of said side walls and extending in parallel, spaced relation to the outer surface of said one side wall and defining a second longitudinally extending trackway between said second flange and said one side wall for receiving and retaining the other of said supporting frame and said backing screen.
Claim 3
Dependent Claim
39 words
The retainer strip according to claim 1 wherein said second flange depends from said side wall at a point adjacent to the end of said base wall which forms, with said first flange, the opening to said first trackway.
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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |