Patent US3798849A successfully refreshed from Google Patents.
US3798849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hyperbolic paraboloid roof structure
Assignee: Individual
•
Filing: 1972-07-03
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Granted: 1974-03-26
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Expires: 1992-07-03
Abstract
Abstract A roof structure for a hanger or the like in which first and second roof sections having the shapes of parts of respective first and second hyperbolic paraboloids, having common base lines are joined along a line lying on the locus of an arch common to the two paraboloids to form a roof having openings of predetermined height between spaced roof supports. Reinforcing girders around the edges of the roof are formed with triangular cross sections made up of hyperbolic paraboloid surfaces joined by vertical edges.
Inventors
- 👤 D Biggs
- 👤 E Konkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:40
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/32; E04B7/00; E04B7/08; E04B7/10; E04B7/102; E04H; E04H6/00; E04H6/44; E04B2001/3235
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
292 words
A roof structure having hyperbolic paraboloid sections, said roof structure comprising: a first section cementitious having the shape of a predetermined part of a hyperbolic paraboloid generated with reference to a preselected grid, said first section having outer edge terminating outlying portions and an arch portion; a second section cementitious having the shape of a predetermined part of a hyperbolic paraboloid generated with reference to said preselected grid, said second section having outer edge terminating outlying portions and an arch portion that is substantially identical to the arch portion of said first section, the arch portion of said second section being positioned adjacent to the arch portion of said first section, so that said arch portions define a common arch therebetween; a third section having the shape of a predetermined part of a hyperbolic paraboloid, said third section having one portion positioned adjacent to predetermined outlying portions of said first section and having another portion positioned adjacent to predetermined outlying portions of said second section with said one portion of said third section outwardly terminating at outer edges spaced with respect to the outer edges of said first section and inwardly terminating at inward edges in contact with said first section inwardly of the outer edges thereof, and said another portion of said third section outwardly terminating at outer edges spaced with respect to the outer edges of said second section and inwardly terminating at inward edges in contact with said second section inwardly of the outer edges thereof; and joining means having one portion joining outer edges of said first and third sections and another portion joining outer edges of said second and third sections whereby a roof structure reinforcing member is formed about said outer edged of said roof structure.
Claim 2
Dependent Claim
292 words
A roof structure having hyperbolic paraboloid sections, said roof structure comprising: a first section cementitious having the shape of a predetermined part of a hyperbolic paraboloid generated with reference to a preselected grid, said first section having outer edge terminating outlying portions and an arch portion; a second section cementitious having the shape of a predetermined part of a hyperbolic paraboloid generated with reference to said preselected grid, said second section having outer edge terminating outlying portions and an arch portion that is substantially identical to the arch portion of said first section, the arch portion of said second section being positioned adjacent to the arch portion of said first section, so that said arch portions define a common arch therebetween; a third section having the shape of a predetermined part of a hyperbolic paraboloid, said third section having one portion positioned adjacent to predetermined outlying portions of said first section and having another portion positioned adjacent to predetermined outlying portions of said second section with said one portion of said third section outwardly terminating at outer edges spaced with respect to the outer edges of said first section and inwardly terminating at inward edges in contact with said first section inwardly of the outer edges thereof, and said another portion of said third section outwardly terminating at outer edges spaced with respect to the outer edges of said second section and inwardly terminating at inward edges in contact with said second section inwardly of the outer edges thereof; and joining means having one portion joining outer edges of said first and third sections and another portion joining outer edges of said second and third sections whereby a roof structure reinforcing member is formed about said outer edged of said roof structure.
Claim 3
Dependent Claim
36 words
The roof structure of claim 1, wherein outer edges of said first and second sections are spaced from one another a distance less than the distance between the outer and inner edges of said second section.
Claim 4
Dependent Claim
30 words
The roof structure of claim 1 wherein the outer edges of said first and second sections are in substantially vertical alignment so that said joining means is substantially vertically positioned.
References Cited (Backward Citations)
US2511974A
Cited
US2928360A
Cited
US2961802A
Cited
US3263322A
Cited
US3137097A
Cited
US3206895A
Cited
US3215153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |