Patent US3640040A successfully refreshed from Google Patents.
US3640040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast-in-place structural truss slab and manufactured pan
Assignee: Individual
•
Filing: 1969-09-19
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Granted: 1972-02-08
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Expires: 1989-09-19
Abstract
Abstract A structural two-way truss slab of egg-crate form is provided with manufactured pans that have openings in the sidewalls thereof with interconnecting members between the openings. The arrangement is such that the pan can remain in place and thus provide a finished ceiling effect. The system further provides an ability to run air-conditioning, electrical, plumbing and other conduits through the slab itself after the slab has been poured. The slab is structurally equivalent to conventional two-way slabs but is of less gross weight.
Inventors
- 👤 Charles C Maclean
- 👤 Alfonso Villa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:07
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/16; E04B5/17; E04B5/18; E04B5/21; E04B5/23; E04B5/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
A structural two-way beam truss slab comprising a slab of concrete having integrally formed therebeneath a plurality of supporting intersecting beams arranged in a grid, said grid made up of a plurality of grid sections each having individual cells formed by inverted plastic pans open at their bottom and whose top walls are firmly attached to the underside of the slab and whose sidewalls are firmly attached to the downwardly extending walls formed by said beams, the sidewalls of selected adjacent pans having aligned openings of substantial cross section, horizontally elongated interconnecting members of substantial cross section that conform in size and shape to the openings in the sidewalls of said pans, the opposite ends of said interconnecting members inserted in tightly fitting engagement in said openings in the sidewalls of said pans, and reinforcing members in said beams that produce a beam grid system of concrete formed with a network of apertures therethrough.
Claim 2
Dependent Claim
154 words
A structural two-way beam truss slab comprising a slab of concrete having integrally formed therebeneath a plurality of supporting intersecting beams arranged in a grid, said grid made up of a plurality of grid sections each having individual cells formed by inverted plastic pans open at their bottom and whose top walls are firmly attached to the underside of the slab and whose sidewalls are firmly attached to the downwardly extending walls formed by said beams, the sidewalls of selected adjacent pans having aligned openings of substantial cross section, horizontally elongated interconnecting members of substantial cross section that conform in size and shape to the openings in the sidewalls of said pans, the opposite ends of said interconnecting members inserted in tightly fitting engagement in said openings in the sidewalls of said pans, and reinforcing members in said beams that produce a beam grid system of concrete formed with a network of apertures therethrough.
Claim 3
Dependent Claim
62 words
A structural two-way beam truss slab as recited in claim 1 wherein said pans have horizontally outwardly extending flanges at their bottoms with said adjacent pans having their flanges in abutting relationship, said flanges having an upwardly recessed sector at their outer periphery to form between the abutting flanges of said adjacent pans a channel which may receive a vertical wall structure.
Claim 4
Dependent Claim
54 words
A structural two-way beam truss slab as recited in claim 1 wherein said openings are V-shaped and the reinforcing members in the beams include a number of longitudinal reinforcing rods and a number of angularly bent rods whose angular portion thereon is substantially parallel to the inclination of the V-shaped opening in each beam.
Claim 5
Dependent Claim
19 words
A structural two-way beam truss slab as recited in claim 1 wherein said horizontally elongated connecting members are hollow.
Claim 6
Dependent Claim
46 words
A structural two-way beam truss slab as recited in claim 1 further comprising covers for said cells essentially formed by two intersecting hollow truncated triangular structures that are slightly larger in cross-sectional form than said openings in said pans with web corners connecting their top edges.
References Cited (Backward Citations)
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Cited
US1633715A
Cited
US2043697A
Cited
US2592634A
Cited
US2534580A
Cited
US2775019A
Cited
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Cited
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US3495367A
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |