US3765134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction of rigid tensioned frame structure
Assignee: Individual
•
Filing: 1970-08-10
•
Granted: 1973-10-16
•
Expires: 1990-08-10
Abstract
Abstract In a roof structure a flexible roofing membrane is supported and secured between at least two layers of tensioned flexible elements such as wires or cords. Each layer comprises a number of longitudinal tensioned wires and a number of transverse tensioned wires. The wires are attached to curved anchorage units, and the entire structure is supported on tensioned trellis trusses and purlins.
Inventors
- 👤 T Gilchrist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:31
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/14; A01G9/1407; A01G9/1469; A01G9/22; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
A curved roof structure comprising in combination at least one layer of flexible roofing membrane supported and secured between at least two layers of tensioned flexible elements, each layer comprising a plurality of longitudinal tensioned flexible elements, a plurality of transverse tensioned flexible elements so arranged as to bear against one another, curved anchorage units for the tensioned flexible elements of one of said layers, said units being disposed in respective planes spaced apart and substantially perpendicular to the ground, a plurality of stabilizing purlins disposed between the anchorage units substantially parallel to the ground, a pair of said purlins disposed adjacent the level of the ground, said flexible elements being steel wires, the steel wires of said one layer being connected between the ground purlins, the wires of one layer being substantially perpendicular to the wires of the other layer.
Claim 2
Dependent Claim
141 words
A curved roof structure comprising in combination at least one layer of flexible roofing membrane supported and secured between at least two layers of tensioned flexible elements, each layer comprising a plurality of longitudinal tensioned flexible elements, a plurality of transverse tensioned flexible elements so arranged as to bear against one another, curved anchorage units for the tensioned flexible elements of one of said layers, said units being disposed in respective planes spaced apart and substantially perpendicular to the ground, a plurality of stabilizing purlins disposed between the anchorage units substantially parallel to the ground, a pair of said purlins disposed adjacent the level of the ground, said flexible elements being steel wires, the steel wires of said one layer being connected between the ground purlins, the wires of one layer being substantially perpendicular to the wires of the other layer.
Claim 3
Dependent Claim
18 words
A roof structure of claim 1, wherein the roofing membrane consists of at least one plastic material sheet.
Claim 4
Dependent Claim
17 words
The roof structure of claim 1, further comprising curved stabilizing units disposed intermedially of the anchorage units.
Claim 5
Dependent Claim
22 words
The roof structure of claim 1, further comprising tensioned trellis trusses supporting the anchorage units and extending substantially perpendicularly from the ground.
Claim 6
Dependent Claim
26 words
The roof structure of claim 1, further comprising tensioned trellis trusses supporting at least one of the stabilizing purlins and extending substantially perpendicularly from the ground.
Claim 7
Dependent Claim
16 words
The roof structure of claim 1, wherein one of said stabilizing purlins is an apex purlin.
Claim 8
Dependent Claim
18 words
The roof structure of claim 6, wherein the flexible roofing membrane is detachably secured to the apex purlin.
Claim 9
Dependent Claim
15 words
The roof structure of claim 1, further comprising means for tensioning each of said wires.
Claim 10
Dependent Claim
21 words
The roof structure of claim 8, wherein said means includes a turnbuckle connected to each wire for individually tensioning each wire.
Claim 11
Dependent Claim
33 words
The roof structure of claim 8, wherein said tensioning means comprises a pulley system, each layer consisting of a length of steel wire associated with the pulley system and arranged in grid formation.
Claim 12
Dependent Claim
21 words
The roof structure of claim 1, further comprising a slidable sheeting movably mounted under the layers of contra-tensioned elongated flexible elements.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |