Patent US4296692A successfully refreshed from Google Patents.
US4296692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway car ceiling panel
Assignee: Alstom SA
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Filing: 1979-09-06
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Granted: 1981-10-27
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Expires: 1999-09-06
Abstract
Abstract The invention relates to a ceiling component which is formed by a curved panel and has a support which supports a layer of sound-proofing and heat insulating material. The support is made in one piece and is constituted by a metal sheet whose edges are bent back on itself and then to form a flange projecting from one surface of said panel. The bent edges alone provide the rigidity necessary for the panel without requiring the use of ribs and girders.
Inventors
- 👤 Marc Roux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:50
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A ceiling component, in particular for rail vehicles, said component being formed by a curved panel and having a support which supports a layer of sound-proofing and heat insulating material, the improvement wherein the support is made in one piece and is constituted by a metal sheet having double edge portions forming a peripheral flange spaced slightly inwardly projecting from one surface of said panel, said double edge portions alone providing the rigidity necessary for the panel and wherein each edge portion is bent twice, firstly completely inwards on itself and, secondly, in a plane which is substantially perpendicular to the first bend and which alone forms the peripheral flange.
Claim 2
Dependent Claim
110 words
A ceiling component, in particular for rail vehicles, said component being formed by a curved panel and having a support which supports a layer of sound-proofing and heat insulating material, the improvement wherein the support is made in one piece and is constituted by a metal sheet having double edge portions forming a peripheral flange spaced slightly inwardly projecting from one surface of said panel, said double edge portions alone providing the rigidity necessary for the panel and wherein each edge portion is bent twice, firstly completely inwards on itself and, secondly, in a plane which is substantially perpendicular to the first bend and which alone forms the peripheral flange.
Claim 3
Dependent Claim
19 words
A component according to claim 1, wherein the metal sheet is perforated and is made of a light-weight metal.
Claim 4
Dependent Claim
48 words
A component according to claim 1, further including a cloth of the type made of synthetic fibre fabric and whose planar dimension corresponds substantially to that of said component and which is held by gripping its edges by means of the double edge portions of said metal sheet.
Claim 5
Dependent Claim
36 words
A component according to claim 1 or claim 3, wherein the peripheral flange fits said layer of sound-proofing and heat insulating material thereto, said layer being held by fixing means connected only to said flange edges.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |