Patent US3757478A successfully refreshed from Google Patents.
US3757478A
Expired / Lapsed
US
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Lightweight hyperbolic paraboloid roof structure
Assignee: Individual
•
Filing: 1972-04-04
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Granted: 1973-09-11
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Expires: 1992-04-04
Abstract
Abstract The roof structure comprises at least one hyperbolic paraboloid formed by structural tension members stretched between bending stress resistant structural boundary members. The boundary members forming the edge members of the roof comprise thin trusses.
Inventors
- 👤 E Pryor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:54
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04B7/10; E04B7/102
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
142 words
A hyperbolic paraboloid roof structure comprising at least one hyperbolic paraboloid bounded by bending stress resistant structural boundary members, said boundary members being arranged substantially in a parallelogram configuration when viewed as vertically projected onto a horizontal plane, the boundary members forming the edge members of said roof structure comprising thin trusses arranged with the thickness dimensions thereof substantially in the vertical direction, the inner portions of each hyperbolic paraboloid comprising a plurality of structural tension members arranged in a crisscross pattern, each of said tension members being substantially parallel to one pair of said boundary members when said tension members and said boundary members are viewed as vertically projected onto a horizontal plane, each of said tension members being connected between the members of the other pair of said boundary members, said tension members being subjected substantially exclusively to tension stress.
Claim 2
Dependent Claim
142 words
A hyperbolic paraboloid roof structure comprising at least one hyperbolic paraboloid bounded by bending stress resistant structural boundary members, said boundary members being arranged substantially in a parallelogram configuration when viewed as vertically projected onto a horizontal plane, the boundary members forming the edge members of said roof structure comprising thin trusses arranged with the thickness dimensions thereof substantially in the vertical direction, the inner portions of each hyperbolic paraboloid comprising a plurality of structural tension members arranged in a crisscross pattern, each of said tension members being substantially parallel to one pair of said boundary members when said tension members and said boundary members are viewed as vertically projected onto a horizontal plane, each of said tension members being connected between the members of the other pair of said boundary members, said tension members being subjected substantially exclusively to tension stress.
Claim 3
Dependent Claim
37 words
A roof structure as claimed in claim 1 comprising a plurality of hyperbolic paraboloids joined in at least one common boundary, the structural boundary members at said common boundary being combined in a single structural boundary member.
Claim 4
Dependent Claim
61 words
A roof structure as claimed in claim 1 wherein each of said trusses is positioned so that at least the central portion thereof is in substantial alignment with the adjacent edge portion of the hyperbolic paraboloid bounded by said truss so that said central portion of said truss effectively forms an extension of the adjacent edge portion of the hyperbolic paraboloid.
Claim 5
Dependent Claim
58 words
A roof structure as claimed in claim 3 wherein each of said trusses is twisted so that each portion thereof is in substantial alignment with the adjacent edge portion of the hyperbolic paraboloid bounded by said truss and so that each portion of each truss effectively forms an extension of the adjacent edge portion of the hyperbolic paraboloid.
Claim 6
Dependent Claim
36 words
A roof structure as claimed in claim 1 wherein each of said trusses comprises an inner rail and an outer rail and a plurality of diagonally arranged truss braces attached between said inner and outer rails.
Claim 7
Dependent Claim
35 words
A roof structure as claimed in claim 5 wherein the boundary line corresponding to the boundary of the hyperbolic paraboloid at each edge truss is substantially coincident with said inner rail of said edge truss.
Claim 8
Dependent Claim
34 words
A roof structure as claimed in claim 5 wherein said tension members connected to said boundary members comprised by said trusses are connected to each of said trusses at said inner rail member thereof.
Claim 9
Dependent Claim
50 words
A roof structure as claimed in claim 7 wherein each truss includes a separate cross-tie member extending from the point of attachment of each tension member at said inner rail to said outer rail, each said cross-tie member being substantially in alignment with the direction of the associated tension member.
Claim 10
Dependent Claim
20 words
A roof structure as claimed in claim 5 wherein said rails and said diagonal braces are comprised of metal tubes.
Claim 11
Dependent Claim
26 words
A roof structure as claimed in claim 9 wherein said tubes consist of steel, and said tubes are attached together by welds to form said truss.
Claim 12
Dependent Claim
63 words
A roof structure as claimed in claim 5 in combination in a building wherein there is provided a side wall arranged substantially directly beneath said inner rail of at least one of said trusses so that the portion of the roof formed by the width of said truss between said inner rail and said outEr rail provides a roof overhang for said wall.
Claim 13
Dependent Claim
48 words
A roof structure as claimed in claim 1 including at least one layer of chain link fence material arranged and supported upon said tension members and said boundary members to fill in the openings therebetween to form a substantially continuous roof structure for the application of roofing materials.
Claim 14
Dependent Claim
56 words
A roof structure as claimed in claim 2 wherein there are provided at least three hyperbolic paraboloids joined together with at least three common boundaries, the low corners of all of said hyperbolic paraboloids being at substantially the same level, and the high corners of all of said hyperbolic paraboloids being at substantially the same level.
Claim 15
Dependent Claim
138 words
A roof structure as claimed in claim 13 wherein a support pier is provided for support of said roof structure at said low corners of each of said hyperbolic paraboloids, a common low point and a common support pier for all of said hyperbolic paraboloids being provided at the center of said roof structure, and a penthouse arranged above said roof structure, said penthouse being centered above said roof structure and being supported substantially completely upon said center pier, said penthouse having an outline shape which is substantially identical to the outline shape of said roof structure and having basic dimensions which are exactly one-half of each of the corresponding dimensions of said roof structure so that the periphery of said penthouse is positioned above the central chords of said hyperbolic paraboloids which define a common horizontal plane.
References Cited (Backward Citations)
US2103859A
Cited
US2912940A
Cited
US2928360A
Cited
GB843529A
Cited
US3280518A
Cited
US3226892A
Cited
US3215153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |