US4749388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for drying moist air
Assignee: Solvay SA
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Filing: 1987-01-29
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Granted: 1988-06-07
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Expires: 2007-01-29
Abstract
Abstract Device for drying moist air, comprising, in an enclosure (1) provided with openings (5, 6) for the admission and removal of air, a receptacle (10) for a solid desiccant and, under the latter, a layered structure (19) of superposed mats of a filter medium.
Inventors
- 👤 Alfred Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:34
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01D53/261; F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
Device for drying moist air, comprising, in an enclosure (1) provided with openings (5, 6) for the admission and removal of air, a receptacle (10) for a solid desiccant and an air- and liquid-permeable packing material (19) arranged under the receptacle (10), characterized in that the packing material (19) is a layered structure consisting of several individual, horizontal, superposed mats made of a filter medium (20, 21, 22, 23, 24) constituted by entangled fiber flock, said mats resting upon one another whereby said solid desiccant forms a liquid solution which percolates through said entangled fiber flock mats as the moist air travels countercurrently through said entangled fiber flock mats.
Claim 2
Dependent Claim
109 words
Device for drying moist air, comprising, in an enclosure (1) provided with openings (5, 6) for the admission and removal of air, a receptacle (10) for a solid desiccant and an air- and liquid-permeable packing material (19) arranged under the receptacle (10), characterized in that the packing material (19) is a layered structure consisting of several individual, horizontal, superposed mats made of a filter medium (20, 21, 22, 23, 24) constituted by entangled fiber flock, said mats resting upon one another whereby said solid desiccant forms a liquid solution which percolates through said entangled fiber flock mats as the moist air travels countercurrently through said entangled fiber flock mats.
Claim 3
Dependent Claim
29 words
Device according to claim 1, characterized in that the layered structure (19) comprises an alternation of mats of loose flock (20, 22) and mats of pressed flock (21, 23).
Claim 4
Dependent Claim
38 words
Device according to claim 2, characterized in that the thickness of the mats of pressed flock (21, 23) and the thickness of the mats of loose flock (20, 22) are in a ratio of between 1:20 and 1:10.
Claim 5
Dependent Claim
37 words
Device according to any one of claims 1, characterized in that the layered structure (19) rests on a grid (17) forming the bottom of the enclosure (1) and defining the abovementioned openings for the admission of air.
Claim 6
Dependent Claim
26 words
Device according to claim 4, characterized in that the layered structure (19) rests on the grid (17) by means of a mat of loose flock (20).
Claim 7
Dependent Claim
17 words
Device according to any one of claims 1, characterized in that the fibres are made of polyethylene.
Claim 8
Dependent Claim
34 words
Device according to any one of claims 1, characterized in that it comprises a fan designed to generate an upward flow of air, successively through the layered structure and in contact with the desiccant.
Claim 9
Dependent Claim
23 words
Device according to any one of claims 1, characterized in that the desiccant is calcium chloride in particulate form and contains a surfactant.
Claim 10
Dependent Claim
27 words
Device according to any one of claims 1, characterized in that the receptacle (10) for the desiccant comprises a series of vertical pockets with a perforated wall.
Claim 11
Dependent Claim
17 words
Device according to claim 9, characterized in that the pockets (10) contain an internal stiffening bracing (16).
References Cited (Backward Citations)
US2363262A
Cited
US2535144A
Cited
US2922488A
Cited
US3221478A
Cited
US3248861A
Cited
US3392511A
Cited
US4064876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |