US4665674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grid ceiling
Assignee: Hunter Douglas Industries BV
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Filing: 1985-12-06
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Granted: 1987-05-19
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Expires: 2005-12-06
Abstract
Abstract A grid ceiling comprising a set of first parallel channel section elongate members and a set of second parallel channel section elongate members, the first members being so arranged transverse to the second members as to form a grid with polygonal spaces therein. Each channel shaped member includes a lower portion and two spaced side flanges extending upwardly therefrom. At least one integral hook is formed at each of the ends of the second members and co-operating first openings are formed in at least one side flange of the first members at first position situated at regular, spaced intervals therealong, so that the hooks of the second members can be engaged in said first openings to form said grid ceiling. A series of one or more second openings are formed in at least one side flange of the second member at second position situated at regular, spaced intervals therealong. The second openings are so shaped that, when the second members are cut at the relevant second positions transverse to the length of the second members, at least one of said integral hooks is formed.
Inventors
- 👤 Johannes A. Brugman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:57
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/12; E04B9/122; E04B9/127; E04B9/34; E04B9/345
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
A grid ceiling comprising a set of first parallel channel section elongate members and a set of second parallel channel section elongate members, the first members being arranged transverse to the second members, to form a grid with polygonal spaces therein, each channel shaped member including a lower portion and two spaced side flanges extending upwardly therefrom, at least one integral hook being formed at each of the ends of said second members and co-operating first openings being formed in at least one side flange of said first members at first positions situated at regular, spaced intervals therealong, so that the hooks of said second members can be engaged in said first openings to form said grid ceiling, a series of one or more second openings being formed in at least one side flange of said second member at second positions situated at regular, spaced intervals therealong, the second openings being so shaped that, when said second members are cut at the relevant second positions transverse to the length of the second member, at least one of said integral hooks is formed.
Claim 2
Dependent Claim
182 words
A grid ceiling comprising a set of first parallel channel section elongate members and a set of second parallel channel section elongate members, the first members being arranged transverse to the second members, to form a grid with polygonal spaces therein, each channel shaped member including a lower portion and two spaced side flanges extending upwardly therefrom, at least one integral hook being formed at each of the ends of said second members and co-operating first openings being formed in at least one side flange of said first members at first positions situated at regular, spaced intervals therealong, so that the hooks of said second members can be engaged in said first openings to form said grid ceiling, a series of one or more second openings being formed in at least one side flange of said second member at second positions situated at regular, spaced intervals therealong, the second openings being so shaped that, when said second members are cut at the relevant second positions transverse to the length of the second member, at least one of said integral hooks is formed.
Claim 3
Dependent Claim
81 words
A grid ceiling according to claim 1, wherein said second members are provided with supporting apertures or recesses to accommodate support means on grid panels mounted in said polygonal spaces, said supporting apertures or recesses being positioned on said at least one side flange of said second members, relative to said second openings which can form said hooks, so that said second openings are covered by the associated grid panels that are mounted in the respective spaces of the grid ceiling.
Claim 4
Dependent Claim
19 words
A grid ceiling according to claim 2, wherein said supporting apertures or recesses and said second openings are interconnected.
Claim 5
Dependent Claim
75 words
A grid ceiling according to claim 1, wherein said first members are provided with supporting apertures or recesses to accommodate support means on grid panels mounted in said spaces, said supporting apertures or recesses being positioned on said at least one side flange of said first member relative to said first openings, so that the first openings are covered by the associated grid panels that are mounted in the respective spaces of said grid ceiling.
Claim 6
Dependent Claim
23 words
A grid ceiling according to claim 4, wherein said supporting apertures or recesses of said first members and said first openings are interconnected.
Claim 7
Dependent Claim
45 words
A grid ceiling according to any preceding claim, wherein the second opening which can form the hooks are so shaped that, after cutting, at least one hook is produced on each of the two free ends caused by the cuts at the relevant second positions.
Claim 8
Dependent Claim
19 words
A grid ceiling according to claim 6, wherein the channel section elongate members are of V or U-shaped cross-section.
Claim 9
Dependent Claim
30 words
A grid ceiling according to claim 6, wherein said channel section elongate members include a lower web portion and two spaced side flanges extending substantially perpendicularly thereto and upwardly therefrom.
Claim 10
Dependent Claim
14 words
A grid ceiling according to claim 6, wherein said side flanges include inturned rims.
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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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |