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US3748801A
Expired / Lapsed
US
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Prefabricated girder channel for ventilation heating or air conditioning of the industrial halls
Assignee: INST USOARE IPIU
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Filing: 1971-04-19
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Granted: 1973-07-31
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Expires: 1991-04-19
Abstract
Abstract An air-diffuser girder is formed by a pair of laterally adjacent reinforced-concrete main beams and a thin sheet spanning their lower longitudinal edges. The crosspieces of the main-beams are joined together to form the upper wall of a duct while the sheet forms the lower wall and the vertical webs of the beams form the side walls. Each of the beams is molded along its lower outside edge with an angle iron to which are welded a plurality of vertical studs. Nuts mounted on these studs hold the sheet removably in place and allow this sheet to be adjustably spaced below the soles of the beams so as to form laterally opening apertures. The longitudinal edges of the sheet extend out beyond the beams and can be bent up to direct air flow upwardly, or the sheet can be shaped against the soles of the beams and formed with central downwardly opening nozzles.
Inventors
- 👤 P Constantinescu
- 👤 M Popescu
- 👤 C Dumitrescu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:21
CPC Classifications
E; E04; E04F; E04F17/00; E04F17/04; E04B; E04B5/00; E04B5/48; F; F24; F24F; F24F13/00; F24F13/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
133 words
A structural element comprising a pair of laterally adjacent reinforced-concrete T-profile main beams formed at their upper sides with mutually approaching ridges, reinforcing rods projecting laterally from said ridges, a wall region of concrete embedding said projecting rods and interconnecting said ridges, and a thin sheet spanning the lower sides of said beams and extending along their length, said ridges being longitudinally joined by and forming with said wall region the upper wall of a horizontally extending duct, said sheet Forming the lower wall of said duct and said beams forming the side walls thereof, each of said beams being provided along its lower edge with an angle iron anchored in the concrete thereof and with a plurality of studs welded laterally to the angle iron, said sheet being mounted on said studs.
Claim 2
Dependent Claim
133 words
A structural element comprising a pair of laterally adjacent reinforced-concrete T-profile main beams formed at their upper sides with mutually approaching ridges, reinforcing rods projecting laterally from said ridges, a wall region of concrete embedding said projecting rods and interconnecting said ridges, and a thin sheet spanning the lower sides of said beams and extending along their length, said ridges being longitudinally joined by and forming with said wall region the upper wall of a horizontally extending duct, said sheet Forming the lower wall of said duct and said beams forming the side walls thereof, each of said beams being provided along its lower edge with an angle iron anchored in the concrete thereof and with a plurality of studs welded laterally to the angle iron, said sheet being mounted on said studs.
Claim 3
Dependent Claim
36 words
The element defined in claim 1 wherein said sheet has longitudinal edges extending laterally beyond said beams, said sheet being spaced from at least one of said beams and thereby forming at least one lateral opening.
Claim 4
Dependent Claim
17 words
The element defined in claim 2 wherein at least one of said longitudinal edges is bent up.
Claim 5
Dependent Claim
19 words
The element defined in claim 3 wherein said sheet is formed with at least one downwardly opening central nozzle.
Claim 6
Dependent Claim
47 words
A structure comprising a support column, and a pair of structural elements, each as defined in claim 1, supported on said column in alignment with one another and with a spacing only sufficient to accommodate thermal expansion and contraction, said structural elements defining a common air duct.
Claim 7
Dependent Claim
113 words
A structure comprising a support column, a pair of structural elements supported on said column in alignment with one another and with a spacing between them, each of said structural elements comprising a pair of laterally adjacent reinforced-concrete profile main beams formed at their upper sides with mutually approaching ridges, and a thin sheet spanning the lower sides of said beams and extending along their length, said ridges being longitudinally joined and forming the upper wall of a horizontally extending duct, said sheet forming the lower wall of said duct and said beams forming the side walls thereof, and an air conditioning unit mounted on said column in the space between said elements.
Claim 8
Dependent Claim
113 words
A structure comprising a support column, a pair of structural elements supported on said column in alignment with one another and with a spacing between them, each of said structural elements comprising a pair of laterally adjacent reinforced-concrete profile main beams formed at their upper sides with mutually approaching ridges, and a thin sheet spanning the lower sides of said beams and extending along their length, said ridges being longitudinally joined and forming the upper wall of a horizontally extending duct, said sheet forming the lower wall of said duct and said beams forming the side walls thereof, and an air conditioning unit mounted on said column in the space between said elements.
Claim 9
Dependent Claim
20 words
The element defined in claim 6 wherein each of said main beams of the load carrying structure is of T-section.
Claim 10
Dependent Claim
36 words
The element defined in claim 6 wherein said sheet has longitudinal edges extending laterally beyond said beams, said sheet being spaced from at least one of said beams and thereby forming at least one lateral opening.
Claim 11
Dependent Claim
17 words
The element defined in claim 8 wherein at least one of said longitudinal edges is bent up.
Claim 12
Dependent Claim
19 words
The element defined in claim 8 wherein said sheet is formed with at least one downwardly opening central nozzle.
Claim 13
Dependent Claim
17 words
The element defined in claim 6, further comprising a wall region extending between and interconnecting said ridges.
Claim 14
Dependent Claim
30 words
The element defined in claim 11 wherein each of said beams has a plurality of reinforcing rods projecting laterally from said ridges, said rods being embedded in said wall region.
Claim 15
Dependent Claim
24 words
The element defined in claim 6 wherein each of said beams is provided along one of its lower longitudinal edges with a mounting strip.
Claim 16
Dependent Claim
14 words
The element defined in claim 13 wherein said mounting strip is an angle iron.
Claim 17
Dependent Claim
37 words
The element defined in claim 14, further comprising a plurality of vertical studs and nuts threadedly mounted thereon, said studs being secured to said angle iron and passing through said sheet, said sheet resting on said nuts.
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |