US4189990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
False ceiling
Assignee: GIF Gesellschaft fuer Ingenieurprojekte Freiburg mbH
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Filing: 1978-04-20
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Granted: 1980-02-26
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Expires: 1998-04-20
Abstract
Abstract A false ceiling wherein a frame supports a set of elongated parallel horizontal trough-shaped slats each of which resembles or constitutes a portion of a hollow cylinder. The slats have longitudinally extending openings flanked by elongated marginal portions. The opening of one of each pair of neighboring slats faces upwardly, and the opening of the other slat of such pair faces downwardly. One marginal portion of one slat of each pair of neighboring slats extends into the interior of the other slat of the same pair and vice versa, and such marginal portions are spaced apart from each other to define passages wherein air can flow from the upper side to the underside of the false ceiling or in the opposite direction. The slats whose openings face upwardly collect liquid and/or solid constituents of air which flows upwardly and impinges against the concave undersides of slats whose openings face downwardly.
Inventors
- 👤 Helmut Kittler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:00
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; E; E04; E04B; E04B9/00; E04B9/02
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
208 words
An air-permeable barrier, particularly a false ceiling or grate for interception of solid and/or liquid constituents of ascending air, comprising a plurality of parallel, substantially horizontal and substantially trough-shaped neighboring slats each bounding an internal space of a predetermined width and including two elongated marginal portions each having a marginal edge, said marginal edges flanking a substantially longitudinally extending opening and being spaced apart by less than said predetermined width as considered across said opening, the opening of one slat of each pair of neighboring slats facing substantially upwardly and the opening of the other slat of each pair of neighboring slats facing substantially downwardly, one marginal portion of one slat of each pair of neighboring slats extending with clearance through said opening and into said internal space of the other slat of the respective pair and vice versa, said marginal portions of each pair of neighboring slats cooperating with one another to define a respective passage through which air can flow between the upper side and the underside of the barrier said passages having flow-through cross-sectional areas which are narrower at, and wider at a distance from, the respective marginal edges of at least one of said cooperating marginal portions of the respective pair of neighboring slats.
Claim 2
Dependent Claim
208 words
An air-permeable barrier, particularly a false ceiling or grate for interception of solid and/or liquid constituents of ascending air, comprising a plurality of parallel, substantially horizontal and substantially trough-shaped neighboring slats each bounding an internal space of a predetermined width and including two elongated marginal portions each having a marginal edge, said marginal edges flanking a substantially longitudinally extending opening and being spaced apart by less than said predetermined width as considered across said opening, the opening of one slat of each pair of neighboring slats facing substantially upwardly and the opening of the other slat of each pair of neighboring slats facing substantially downwardly, one marginal portion of one slat of each pair of neighboring slats extending with clearance through said opening and into said internal space of the other slat of the respective pair and vice versa, said marginal portions of each pair of neighboring slats cooperating with one another to define a respective passage through which air can flow between the upper side and the underside of the barrier said passages having flow-through cross-sectional areas which are narrower at, and wider at a distance from, the respective marginal edges of at least one of said cooperating marginal portions of the respective pair of neighboring slats.
Claim 3
Dependent Claim
36 words
A barrier as defined in claim 1, wherein said slats constitute or resemble portions of hollow cylinders and the angular distance between said marginal edges, as measured across the respective openings, is less than 180 degrees.
Claim 4
Dependent Claim
21 words
A barrier as defined in claim 2, wherein the cross sections of said slats extend along arcs greater than 180 degrees.
Claim 5
Dependent Claim
40 words
A barrier as defined in claim 1, further comprising means for adjustably supporting at least some of said slats, such slats being adjustable with respect to said supporting means in directions to vary the effective cross-sectional areas of said passages.
Claim 6
Dependent Claim
27 words
A barrier as defined in claim 4, wherein said adjustable slats are turnable in said supporting means about axes which are parallel to the marginal edges thereof.
Claim 7
Dependent Claim
19 words
A barrier as defined in claim 4, further comprising means for holding said adjustable slats in selected adjusted positions.
Claim 8
Dependent Claim
40 words
A barrier as defined in claim 1, wherein said slats constitute portions of hollow cylinders and at least one of each pair of neighboring slats extends along an arc of approximately 270 degrees, as considered in the circumferential direction thereof.
Claim 9
Dependent Claim
39 words
A barrier as defined in claim 1, further comprising supporting means for said slats, said supporting means and said slats together constituting a self-supporting module which can be suspended from the structural ceiling of a room or the like.
Claim 10
Dependent Claim
42 words
A barrier as defined in claim 8, wherein each of said slats comprises a first and a second end portion and said supporting means comprises first and second panels extending substantially transversely, and connected to the respective end portions, of said slats.
Claim 11
Dependent Claim
21 words
A barrier as defined in claim 9, wherein said panels have arcuate slots for the respective end portions of said slats.
Claim 12
Dependent Claim
36 words
A barrier as defined in claim 10, wherein at least some of said slots extend beyond the marginal edges of the respective slats so that the corresponding slats are angularly adjustable with respect to said panels.
Claim 13
Dependent Claim
30 words
A barrier as defined in claim 11, wherein the length of said slots is such that the corresponding slats are turnable to and from positions of abutment with neighboring slats.
Claim 14
Dependent Claim
18 words
A barrier as defined in claim 1, wherein all of said slats are of identical size and shape.
Claim 15
Dependent Claim
27 words
A barrier as defined in claim 1, wherein the radii of curvature of slats whose openings face upwardly exceed the radii of curvature of the other slats.
Claim 16
Dependent Claim
59 words
A barrier as defined in claim 1, wherein each of said slats has a first and a second end portion and further comprising first and second supporting panels extending transversely of said slats and having complementary slots for the respective end portions of said slats, and means for holding said slats against lengthwise movement with respect to said panels.
Claim 17
Dependent Claim
29 words
A barrier as defined in claim 15, wherein said holding means comprises deformable projections forming part of said end portions and overlying the outer sides of the respective panels.
Claim 18
Dependent Claim
14 words
A barrier as defined in claim 1, further comprising a frame for said slats.
Claim 19
Dependent Claim
16 words
A barrier as defined in claim 17, wherein said slats are separably secured to said frame.
Claim 20
Dependent Claim
14 words
A barrier as defined in claim 1, wherein said slats consist of corrosion-resistant material.
Claim 21
Dependent Claim
13 words
A barrier as defined in claim 19, wherein said material is a metal.
Claim 22
Dependent Claim
15 words
A barrier as defined in claim 1, wherein said slats consist of synthetic plastic material.
Claim 23
Dependent Claim
62 words
A barrier as defined in claim 1, wherein said slats have first and second end portions and further comprising first and second supporting panels extending transversely of said slats and having complementary slots for the respective end portions of said slats, said panels and said slats together constituting a first module and further comprising a second module adjacent to said first module.
Claim 24
Dependent Claim
68 words
A barrier as defined in claim 22, wherein said second module is disposed at a level below said first module and one panel of said first module has a downwardly extending edge portion, one panel of said second module having a slit into which said edge portion extends and the panels of said first module being disposed substantially at right angles to the panels of said second module.
Claim 25
Dependent Claim
24 words
A barrier as defined in claim 23, wherein said edge portion extends into the upwardly facing opening of one slat of said second module.
Claim 26
Dependent Claim
20 words
A barrier as defined in claim 23, wherein said edge portion has several apertures for the flow of air therethrough.
Claim 27
Dependent Claim
51 words
A barrier as defined in claim 22, wherein one panel of said first module is adjacent to but spaced from one panel of said second module, said adjacent panels having downwardly extending edge portions and further comprising coupling means disposed between said adjacent panels and having sockets for said edge portions.
Claim 28
Dependent Claim
19 words
A barrier as defined in claim 26, wherein said coupling means has a concave upper side intermediate said sockets.
Claim 29
Dependent Claim
19 words
A barrier as defined in claim 26, wherein said edge portions have apertures for the passage of air therethrough.
Claim 30
Dependent Claim
44 words
A barrier as defined in claim 22, wherein said modules are coplanar and one panel of one said modules is adjacent to but spaced from one panel of the other of said modules, and further comprising an illuminating insert disposed between said adjacent panels.
Claim 31
Dependent Claim
23 words
A barrier as defined in claim 29, wherein said insert comprises a casing having two downwardly extending flanges secured to said adjacent panels.
Claim 32
Dependent Claim
26 words
A barrier as defined in claim 30, wherein said casing has an internal space and further comprising means for drawing air upwardly from said internal space.
Claim 33
Dependent Claim
57 words
A barrier as defined in claim 31, wherein said insert further comprises a light source in said casing, a light-transmitting pane below said source, and distancing means interposed between said casing and said pane to define a plurality of paths for the flow of air from below said pane, along said paths and into said internal space.
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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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |