US3691576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Span structure
Assignee: Individual
•
Filing: 1970-12-18
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Granted: 1972-09-19
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Expires: 1990-12-18
Abstract
Abstract The invention relates to a novel span structure as for ramps and bridges having a series of crossbeam members secured to an assembly of side elements which comprise an upper hollow longitudinal member capable of withstanding compression forces, a lower longitudinal runner element capable of withstanding tension forces, a vertical side element between the hollow member and the lower element, and a vertical stiffener element between the crossbeam and the lower element. The structure has uniform longitudinal flex and the side elements provide a column effect.
Inventors
- 👤 Ray P Miles
- 👤 Andrew F Szucs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:53
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A span structure useable as a bridge or ramp comprising a series of crossbeam members each end of which is secured perpendicularly to an assembly of longitudinal side elements, said elements comprising: a. an upper hollow longitudinal element capable of withStanding compression forces and functioning as a curb element, b. a lower longitudinal element capable of withstanding tension forces, c. a vertical web element connecting said upper and lower elements, d. a vertical stiffener element connected to said web element, to said lower element, and to the underside of said crossbeam member, e. said crossbeam member end portion connected to said web element and to said hollow longitudinal element.
Claim 2
Dependent Claim
109 words
A span structure useable as a bridge or ramp comprising a series of crossbeam members each end of which is secured perpendicularly to an assembly of longitudinal side elements, said elements comprising: a. an upper hollow longitudinal element capable of withStanding compression forces and functioning as a curb element, b. a lower longitudinal element capable of withstanding tension forces, c. a vertical web element connecting said upper and lower elements, d. a vertical stiffener element connected to said web element, to said lower element, and to the underside of said crossbeam member, e. said crossbeam member end portion connected to said web element and to said hollow longitudinal element.
Claim 3
Dependent Claim
17 words
The span structure of claim 1 wherein said series of crossbeams have an overlay of grating strip.
Claim 4
Dependent Claim
15 words
The span structure of claim 1 wherein said upper element has a substantially rectangular cross-section.
Claim 5
Dependent Claim
15 words
The span structure of claim 1 wherein said upper element has a substantially tubular cross-section.
Claim 6
Dependent Claim
17 words
The span structure of claim 1 wherein said vertical stiffener element is perpendicular to said web element.
Claim 7
Dependent Claim
20 words
The span structure of claim 1 wherein said hollow longitudinal element is connected to the upperside of said crossbeam member.
References Cited (Backward Citations)
US60205A
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US527430A
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US795899A
Cited
US2246766A
Cited
US2266543A
Cited
US2336622A
Cited
US2390194A
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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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |