US3899152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete form including extruded aluminum support structure
Assignee: Aluma Building Systems Inc
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Filing: 1974-01-18
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Granted: 1975-08-12
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Expires: 1994-01-18
Abstract
Abstract Concrete forming structures are provided particularly for use as horizontal floor forms or vertical wall forms. All such forms have a plurality of beam members placed across and secured to additional structural members such as trusses or stiffeners. Each beam is usually formed of extruded aluminum, and has an upper portion which has an open section in which an independent beam stiffening joist member may be secured. Sheeting, such as plywood panels which are usually used for concrete forming, may be nailed or screwed to a concrete forming structure at the independent beam stiffening joist members, which are usually wood. The deflection resistance of a beam having a wooden beam stiffening joist member secured in its upper portion is improved over that of a standard I-beam having an equal cross-sectionaal area of the same metal. Any of the concrete forming structures may be removed from the concrete when it is has sufficiently cured, and ''''flown'''' using known construction cranes to another working position which may be several storeys above the floor from which it has just been removed.
Inventors
- 👤 Peter J Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:39
CPC Classifications
E; E04; E04G; E04G19/00; E04G19/003; E04G11/00; E04G11/36; E04G11/38; E04G11/48; E04G11/50; E04G17/00; E04G17/14; E04G2011/505
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
417 words
For use in the construction of buildings, a concrete forming structure having a concrete forming panel comprising a plurality of substantially planar sheets of material secured to a plurality of beams, each of which is formed of extruded aluminum and has base, web and upper portions; said base portion of each said beam having a pair of laterally extending flanges and a centrally located, generally T-shaped slot formed longitudinally therein, and having substantially parallel side walls said slot having upper and lower sections where the width of said upper section is greater than the width of said lower section; said web portion of each said beam being formed between said upper portion and said base portion substantially along the entire length of said beam so as to be able to transfer load forces from said upper portion to said base portion at any place along the length of said beam; said upper portion of each said beam being in the form of an inverted top hat portion which is open upwardly and being defined by a horizontally extending bottom, a pair of substantially parallel side walls extending vertically upwardly from said bottom, and a flange extending horizontally outwardly at the top of each said side wall; where the width and height of said inverted top hat portion of said beam are each substantially greater than the width and height of the upper section of said generally T-shaped slot; and the width of each laterally extending flange of said base portion is substantially greater than the width of each of the flanges of said inverted top hat portion; and an independent beam stiffening joist member of substantially rectangular cross-section with a crosswise dimension substantially equal to the average crosswise dimension between said side walls of said upper, inverted top hat portion of said beam being secured in said upper section of each of said beams by means projecting inwardly from at least one of said side walls in each respective upper section and forced into said beam stiffening joist member so as to preclude upward movement therefrom, and so as to increase the deflection resistance of each of said beams; said planar sheets being secured to said beams by driveable fastening meAns driven through said sheets and into said independent beam stiffening joist members; said beams being further secured by bolts having heads in said generally T-shaped slots of said beams to additional structural members so that said concrete forming structure can be moved as an integral unit.
Claim 2
Dependent Claim
417 words
For use in the construction of buildings, a concrete forming structure having a concrete forming panel comprising a plurality of substantially planar sheets of material secured to a plurality of beams, each of which is formed of extruded aluminum and has base, web and upper portions; said base portion of each said beam having a pair of laterally extending flanges and a centrally located, generally T-shaped slot formed longitudinally therein, and having substantially parallel side walls said slot having upper and lower sections where the width of said upper section is greater than the width of said lower section; said web portion of each said beam being formed between said upper portion and said base portion substantially along the entire length of said beam so as to be able to transfer load forces from said upper portion to said base portion at any place along the length of said beam; said upper portion of each said beam being in the form of an inverted top hat portion which is open upwardly and being defined by a horizontally extending bottom, a pair of substantially parallel side walls extending vertically upwardly from said bottom, and a flange extending horizontally outwardly at the top of each said side wall; where the width and height of said inverted top hat portion of said beam are each substantially greater than the width and height of the upper section of said generally T-shaped slot; and the width of each laterally extending flange of said base portion is substantially greater than the width of each of the flanges of said inverted top hat portion; and an independent beam stiffening joist member of substantially rectangular cross-section with a crosswise dimension substantially equal to the average crosswise dimension between said side walls of said upper, inverted top hat portion of said beam being secured in said upper section of each of said beams by means projecting inwardly from at least one of said side walls in each respective upper section and forced into said beam stiffening joist member so as to preclude upward movement therefrom, and so as to increase the deflection resistance of each of said beams; said planar sheets being secured to said beams by driveable fastening meAns driven through said sheets and into said independent beam stiffening joist members; said beams being further secured by bolts having heads in said generally T-shaped slots of said beams to additional structural members so that said concrete forming structure can be moved as an integral unit.
Claim 3
Dependent Claim
24 words
The concrete forming structure of claim 1 where said additional structural members are a plurality of spaced apart stiffener members secured to said beams.
Claim 4
Dependent Claim
25 words
The concrete forming structure of claim 1 where said additional structural members are at least a pair of spaced apart trusses secured to said beams.
Claim 5
Dependent Claim
81 words
The concrete forming structure of claim 3 where said pair of spaced apart trusses, said beams and beam stiffening joist members, and said sheets of material comprise an integral structure where said trusses are upwardly extending and substantially parallel, each truss having upper and lower chord members and truss members rigidly secured to and extending between said chord members; each of said beams being secured transversely across said trusses; each said truss member and chord member being formed of extruded aluminum.
Claim 6
Dependent Claim
32 words
The concrete forming structure of claim 4, where the thickness of each said horizontally extending flange is greater than the thickness of each said side wall, at least at its juncture therewith.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |