US3720033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof building element and method of making a roof
Assignee: BURLEIGH J VAN
•
Filing: 1970-08-13
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Granted: 1973-03-13
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Expires: 1990-08-13
Abstract
Abstract A roof is made by means of a building element in the form of sheet piling having a narrow weakened central zone transverse to its longitudinal direction, by which the panel is hoisted from, and attached to, the ridge beam, the panel thereby being automatically bent to form a gable roof section by gravity. The cross-sectional contour of the panel provides channels for insulation and ventilation.
Inventors
- 👤 Burleigh J Van
- 👤 C Breas
- 👤 M Breas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:39
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/20; E04B7/24; E04C; E04C2/00; E04C2/30; E04C2/40; E04C2/405
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A method of forming a roof span comprising providing a substantially planar roof spanning sheet having substantially continuous longitudinal ridges and a substantially castellated cross-section, said ridges being partly ground away in the longitudinal center of the sheet in a narrow zone along a line transverse to the longitudinal direction of the ridges and in which the corresponding outer ridge portions on one side of the neutral face are left intact, the roof spanning sheet being formed from resilient material at least in the area in the longitudinal center of said sheet where the ridges are partly removed, and hoisting the roof spanning sheet by its longitudinal center such that the planar legs of the sheet pivot about said longitudinal center and form upright legs of said roof span.
Claim 2
Independent Claim
129 words
A method of forming a roof span comprising providing a substantially planar roof spanning sheet having substantially continuous longitudinal ridges and a substantially castellated cross-section, said ridges being partly ground away in the longitudinal center of the sheet in a narrow zone along a line transverse to the longitudinal direction of the ridges and in which the corresponding outer ridge portions on one side of the neutral face are left intact, the roof spanning sheet being formed from resilient material at least in the area in the longitudinal center of said sheet where the ridges are partly removed, and hoisting the roof spanning sheet by its longitudinal center such that the planar legs of the sheet pivot about said longitudinal center and form upright legs of said roof span.
Claim 3
Independent Claim
129 words
A method of forming a roof span comprising providing a substantially planar roof spanning sheet having substantially continuous longitudinal ridges and a substantially castellated cross-section, said ridges being partly ground away in the longitudinal center of the sheet in a narrow zone along a line transverse to the longitudinal direction of the ridges and in which the corresponding outer ridge portions on one side of the neutral face are left intact, the roof spanning sheet being formed from resilient material at least in the area in the longitudinal center of said sheet where the ridges are partly removed, and hoisting the roof spanning sheet by its longitudinal center such that the planar legs of the sheet pivot about said longitudinal center and form upright legs of said roof span.
Claim 4
Independent Claim
129 words
A method of forming a roof span comprising providing a substantially planar roof spanning sheet having substantially continuous longitudinal ridges and a substantially castellated cross-section, said ridges being partly ground away in the longitudinal center of the sheet in a narrow zone along a line transverse to the longitudinal direction of the ridges and in which the corresponding outer ridge portions on one side of the neutral face are left intact, the roof spanning sheet being formed from resilient material at least in the area in the longitudinal center of said sheet where the ridges are partly removed, and hoisting the roof spanning sheet by its longitudinal center such that the planar legs of the sheet pivot about said longitudinal center and form upright legs of said roof span.
Claim 5
Dependent Claim
39 words
The method of claim 1 in which the ridges are partly removed to form a space having a V-shaped cross-section and in which the roof spanning sheet is hoisted to a ridge beam having a complementary V-shaped bottom cross-section.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |