Patent US3853519A successfully refreshed from Google Patents.
US3853519A
Expired / Lapsed
US
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Gas filter
Assignee: American Air Filter Co Inc
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Filing: 1972-10-03
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Granted: 1974-12-10
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Expires: 1992-10-03
Abstract
Abstract A gas filter of the type having a flow-through housing with a plurality of removable gas filter elements disposed therein, each filter element comprised of a frame perimetrically connecting opposed flow-through sidewalls of texturized expansiblecontractable sheet material, said filter elements containing activated granular carbon, the flow-through sidewalls exerting a positive compacting pressure on the contained granular carbon thereby preventing settling and channeling, and maintaining a gas flow-path of a minimum preselected length through the activated carbon.
Inventors
- 👤 J York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:25
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0027; B01D46/0036; B01D46/0002; B01D46/0005; B01D46/0006; B01D46/30; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
170 words
A gas filter comprising: a flow-through housing having a dirty gas inlet and a clean gas outlet; a plurality of removable gas filter elements each including a peripheral frame and two attached opposed flow-through faces, at least one of said faces being detachably mounted to said frame, said faces having planar surfaces of texturized expansible-contractable sheet material in a cross-section of peaks and valleys with a bi-axially oriented coefficient of restitution whereby the coefficient of restitution in either direction is greater than the coefficient of restitution for untexturized sheet material; mounting means for disposing said gas filter elements within said housing in spaced relationship; granular carbon filter material contained in said removable gas filter elements and held under compression by said expansiblecontractable teXturized sheet material faces to prevent settling thereof and insure that all gas passing therethrough passes a minimum preselected distance through said filter material whereby said gas filter elements eliminate the need for additional support means in order to maintain a constant pressure on said carbon filter material.
Claim 2
Dependent Claim
170 words
A gas filter comprising: a flow-through housing having a dirty gas inlet and a clean gas outlet; a plurality of removable gas filter elements each including a peripheral frame and two attached opposed flow-through faces, at least one of said faces being detachably mounted to said frame, said faces having planar surfaces of texturized expansible-contractable sheet material in a cross-section of peaks and valleys with a bi-axially oriented coefficient of restitution whereby the coefficient of restitution in either direction is greater than the coefficient of restitution for untexturized sheet material; mounting means for disposing said gas filter elements within said housing in spaced relationship; granular carbon filter material contained in said removable gas filter elements and held under compression by said expansiblecontractable teXturized sheet material faces to prevent settling thereof and insure that all gas passing therethrough passes a minimum preselected distance through said filter material whereby said gas filter elements eliminate the need for additional support means in order to maintain a constant pressure on said carbon filter material.
Claim 3
Dependent Claim
38 words
The gas filter of claim 1 wherein the said flow-through faces are of flat sheet steel, linearly compressed in the longitudinal direction to form peaks and valleys therein, giving said sheet steel a bi-axially oriented coefficient of restitution.
References Cited (Backward Citations)
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |