US3787020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete forming structure
Assignee: Aluma Building Systems Inc
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Filing: 1971-12-02
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Granted: 1974-01-22
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Expires: 1991-12-02
Abstract
Abstract A concrete forming structure is provided wherein a pair of substantially parallel trusses have a plurality of beam members placed transversely across their upper end with a substantially planar upper deck secured to the upper edges of the beams. Each beam has an upper portion which comprises an open, inverted top hat section into which a wooden joist member may be forced and graspingly secured in snug manner. Panels, such as plywood, which are usually used for concrete forming, may be nailed or screwed to the concrete forming structure at the wooden joists engaged in the open top hat sections of the beams. The deflection resistance of a beam having a wooden joist graspingly and snugly secured therein is improved over that of an I-beam having a similar metal cross-section. When a floor panel poured on the concrete forming structure is cured, the structure may be lowered from beneath that panel and ''''flown'''' using known construction cranes to a position several storeys above the floor from which it had just been removed in order for a new floor panel to be poured on the emplaced concrete forming structure.
Inventors
- 👤 P Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:44
CPC Classifications
E; E04; E04G; E04G19/00; E04G19/003; E04G11/00; E04G11/36; E04G11/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
225 words
For use in construction of buildings having poured concrete floors, a concrete forming structure comprising: truss and beam members arranged to form upwardly extending, substantially parallel trusses having beams placed transversely across their upper ends, and a substantially planar uppeR deck placed across the upper edges of said beams and secured thereto; each of said transverse beams having an upper section in the form of an inverted top hat open at its upper end, and adapted to graspingly secure a wooden joist member having a crosswise dimension substantially equal to the average crosswise dimension of said open, upper section when such a wooden joist member is placed therein; said upper deck comprising a plurality of panels secured to said joist members by drivable fastening means driven through said panels and into said joist members; said upper and lower ends of each of said truss members comprising a beam member extending along the length of each said truss at the upper and lower extremities of each, respectively; and support means to support the lower ends of said trusses comprising a plurality of screw jack means placed benath said lower beam member of each of said trusses; each said screw jack means being hingedly secured to a respective one of said lower beam members, and being adapted to be swung away from beneath said lower beam member.
Claim 2
Dependent Claim
225 words
For use in construction of buildings having poured concrete floors, a concrete forming structure comprising: truss and beam members arranged to form upwardly extending, substantially parallel trusses having beams placed transversely across their upper ends, and a substantially planar uppeR deck placed across the upper edges of said beams and secured thereto; each of said transverse beams having an upper section in the form of an inverted top hat open at its upper end, and adapted to graspingly secure a wooden joist member having a crosswise dimension substantially equal to the average crosswise dimension of said open, upper section when such a wooden joist member is placed therein; said upper deck comprising a plurality of panels secured to said joist members by drivable fastening means driven through said panels and into said joist members; said upper and lower ends of each of said truss members comprising a beam member extending along the length of each said truss at the upper and lower extremities of each, respectively; and support means to support the lower ends of said trusses comprising a plurality of screw jack means placed benath said lower beam member of each of said trusses; each said screw jack means being hingedly secured to a respective one of said lower beam members, and being adapted to be swung away from beneath said lower beam member.
Claim 3
Dependent Claim
80 words
The concrete forming structure of claim 1 wherein each said screw jack means comprises a post having a screw thread at each end; said post being received in a base and a top; and means to turn said threaded post to cause its advance or withdrawal from each of said base and said top; said top being hingedly secured to said lower beam member; and means to secure said screw jack when swung away from beneath said lower beam member.
Claim 4
Dependent Claim
17 words
The concrete forming structure of claim 1 wherein each truss and beam member is formed of aluminum.
Claim 5
Dependent Claim
257 words
For use in construction of buildings having poured concrete floors, a concrete forming structure comprising: upwardly extending, substantially parallel trusses having upper and lower beam members extending along the length of each said truss at the upper and lower extremities of each, respectively; a plurality of transverse beams placed transversely across said trusses and adapted to be secured thereto; and a substantially planar upper deck placed across the upper edges of said transverse beams and secured thereto; each of said transverse beams having an upper section in the form of an inverted top hat open at its upper end, and adapted to graspingly secure a wooden joist member having a crosswise dimension substantially equal to the average crosswise dimension of said open, upper section when such a wooden joist member is placed therein; said upper deck comprising a plurality of panels secured to said joist members by drivable fastening means driven through said panels and into said joist members; and support means to support the lower ends of said trusses; wherein each said wooden joist member is snugly secured in a respective inverted top hat section of one of said transverse beams so as to increase the deflection resistance of said transverse beam; and wherein said snugly secured joist member is held in said inverted top hat section by a plurality of ridges formed in each side thereof and shaped to grip the sides of the wooden joist member so as to preclude upward movement of the wooden joist member out of said inverted top hat section.
Claim 6
Dependent Claim
257 words
For use in construction of buildings having poured concrete floors, a concrete forming structure comprising: upwardly extending, substantially parallel trusses having upper and lower beam members extending along the length of each said truss at the upper and lower extremities of each, respectively; a plurality of transverse beams placed transversely across said trusses and adapted to be secured thereto; and a substantially planar upper deck placed across the upper edges of said transverse beams and secured thereto; each of said transverse beams having an upper section in the form of an inverted top hat open at its upper end, and adapted to graspingly secure a wooden joist member having a crosswise dimension substantially equal to the average crosswise dimension of said open, upper section when such a wooden joist member is placed therein; said upper deck comprising a plurality of panels secured to said joist members by drivable fastening means driven through said panels and into said joist members; and support means to support the lower ends of said trusses; wherein each said wooden joist member is snugly secured in a respective inverted top hat section of one of said transverse beams so as to increase the deflection resistance of said transverse beam; and wherein said snugly secured joist member is held in said inverted top hat section by a plurality of ridges formed in each side thereof and shaped to grip the sides of the wooden joist member so as to preclude upward movement of the wooden joist member out of said inverted top hat section.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |