US3740916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel construction
Assignee: Individual
•
Filing: 1971-03-24
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Granted: 1973-06-26
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Expires: 1991-03-24
Abstract
Abstract A tab-connected panel including a substantially rectangular sheet of metal which has had its opposite edges bent over toward each other to form spaced-apart edge margins spaced outwardly from and overlying the central expanse of the sheet. An elongated stiffener extends laterally of the sheet with its opposite ends wedged in the spaces between the edge margins and the central expanse. Tabs formed in the edge margins are bent over and into openings in the stiffener to secure the sheet to the stiffener. A raised ridge is formed along one edge of the panel and a groove is formed along its opposite edge so that similar panels placed in edge-to-edge relation will interlock.
Inventors
- 👤 P Kenaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:17
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/48; E06B3/485; E04; E04C; E04C2/00; E04C2/02; E04C2/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
231 words
A tab-connected panel comprising a sheet of metal having a central expanse, a pair of opposed connecting portions at opposite edges of the central expanse bent outwardly in the same direction from and at substantial angles relative to said central expanse, each connecting portion having an outer edge spaced outwardly from said central expanse, and opposed edge margins bent over toward each other from said outer edges of the connecting portions, said edge margins being spaced outwardly from and overlying portions of one face of said central expanse and having bendable tabs thereon, and an elongated stiffener extending laterally of and adjacent said face of the central expanse and having opposite end portions which are received in the spaces between said edge margins and the central expanse of such sheet, each end portion having an end extremity which abuts an inwardly facing surface of a connecting portion and an opening formed therein adjacent its associated edge margin, said opening being aligned with a tab on said edge margin and presenting a lip at a side of the opening nearest said end extremity of the stiffener, said lip having an undersurface which faces the central expanse of the sheet, a tab on the end margin being bent back on itself toward said end extremity of the stiffener, into said opening and under said lip to secure said edge margin to said stiffener.
Claim 2
Dependent Claim
231 words
A tab-connected panel comprising a sheet of metal having a central expanse, a pair of opposed connecting portions at opposite edges of the central expanse bent outwardly in the same direction from and at substantial angles relative to said central expanse, each connecting portion having an outer edge spaced outwardly from said central expanse, and opposed edge margins bent over toward each other from said outer edges of the connecting portions, said edge margins being spaced outwardly from and overlying portions of one face of said central expanse and having bendable tabs thereon, and an elongated stiffener extending laterally of and adjacent said face of the central expanse and having opposite end portions which are received in the spaces between said edge margins and the central expanse of such sheet, each end portion having an end extremity which abuts an inwardly facing surface of a connecting portion and an opening formed therein adjacent its associated edge margin, said opening being aligned with a tab on said edge margin and presenting a lip at a side of the opening nearest said end extremity of the stiffener, said lip having an undersurface which faces the central expanse of the sheet, a tab on the end margin being bent back on itself toward said end extremity of the stiffener, into said opening and under said lip to secure said edge margin to said stiffener.
Claim 3
Dependent Claim
78 words
The panel of claim 1 wherein said stiffener comprises a channel-shaped member including an elongated web and a pair of elongated, opposed marginal flanges extending outwardly in the same direction from one face of the web, the stiffener is positioned with said web substantially paralleling and spaced from the central expanse of said sheet and with outer edges of said flanges resting on said central expanse, and said opening in an end portion is formed in said web.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |