Patent US3969865A successfully refreshed from Google Patents.
US3969865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling structure
Assignee: Individual
•
Filing: 1974-08-26
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Granted: 1976-07-20
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Expires: 1994-08-26
Abstract
Abstract A ceiling structure having a plurality of ceiling sheets supported by a plurality of main beams and transverse suspension beams, the main beams on their upper part having resilient side webs to engage projections extending from the suspension beams, the main beams on their lower side having resilient web portions to secure some short beam-shaped suspension means, these suspension means having at their lower parts protruding suspension portions to engage grooves in adjoining ceiling sheets. This structure is easy to mount and permits a completely symmetrical pressure on the main beams during the mounting of each sheet.
Inventors
- 👤 Finn Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:45
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/22; E04B9/28; E04B9/06; E04B9/065; E04B9/067; E04B9/068; E04B9/18; E04B9/20; E04B9/24; E04B9/241; E04B9/242; E04B9/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
176 words
A ceiling structure of the type having a plurality of adjoining ceiling sheets having two mutually parallel grooves, said ceiling sheet being supported by suspension means shaped as in inverted T, the lower part of the suspension means being provided with protruding suspension portions, and the upper part of said suspension means being thickened, said suspension means being secured to a plurality of main beams being symmetrical with regard to a longitudinal central plane and at their lower parts being provided with resiliently movable end webs facing each other and their upper parts engaging parts of transverse suspension beams, characterized by each of the main beams having two side webs mutually connected by means of a resilient intermediate web which is U-shaped and having legs of lengths permitting the upper portions of the side webs to be displaced with respect to each other, said upper portion having flanges received by the suspension beams, said lower part of the main beams being provided with mutually facing end webs disposed in a plane perpendicular to said centre plane.
Claim 2
Dependent Claim
176 words
A ceiling structure of the type having a plurality of adjoining ceiling sheets having two mutually parallel grooves, said ceiling sheet being supported by suspension means shaped as in inverted T, the lower part of the suspension means being provided with protruding suspension portions, and the upper part of said suspension means being thickened, said suspension means being secured to a plurality of main beams being symmetrical with regard to a longitudinal central plane and at their lower parts being provided with resiliently movable end webs facing each other and their upper parts engaging parts of transverse suspension beams, characterized by each of the main beams having two side webs mutually connected by means of a resilient intermediate web which is U-shaped and having legs of lengths permitting the upper portions of the side webs to be displaced with respect to each other, said upper portion having flanges received by the suspension beams, said lower part of the main beams being provided with mutually facing end webs disposed in a plane perpendicular to said centre plane.
Claim 3
Dependent Claim
34 words
A ceiling struture according to claim 1 further characterized by a plurality of auxiliary beams for mounting ceiling sheets of fragile material, said auxiliary beams having grooves disposed to engage said protruding suspension portion.
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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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |