Patent US3630479A successfully refreshed from Google Patents.
US3630479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic slab for roofs, floors, platforms, and the like
Assignee: FUTURA ROOFS Inc
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Filing: 1969-04-23
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Granted: 1971-12-28
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Expires: 1989-04-23
Abstract
Abstract The means and method herein described may be used to produce upon supporting walls an elevated monolithic slab of concrete or the like, to serve as roofs, gabled or flat, for building structures generally, for floors of buildings, for platforms, etc. Use is made of a simplified form structure comprising a plurality of reusable form units, all alike, assembled side by side and end to end, to be erected upon supporting walls therefor and upon a temporary intermediate supporting means, in such a way as to permit pouring of fluid concrete thereover and thereinto to produce, when set, a slab which rests directly upon the tops of such walls. As part of the monolithic slab thus produced, builtin joists or trusses may be formed upon its underside concurrently in the single concrete-pouring operation involved. All form units are so interfitted as to remain fixedly in operative positions, minus any fastening means therefor, thereby facilitating a subsequent dismantling of the form structure, unit by unit, for removal and repeated use elsewhere.
Inventors
- 👤 Jack E Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:05
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/36; E04G11/40; E04G11/46; E04G11/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
325 words
A form structure for production of a concrete slab two of whose opposite edge portions are to be rested upon the coplanar tops of spaced supporting walls to be carried thereby comprising a plurality of similar form units all provided with elongated base walls having lengths approximately half the span between the supporting walls, and the fulcrum means depending at one end thereof for elevating each base wall above the tops of the supporting wall therefor, half of the form units being arranged side by side in rows extending transversely of the supporting walls, along with a like number thereof disposed end to end in pairs arranged in parallelism with the supporting walls upon the tops of which the fulcrum means of the form units are adapted to be rested when the inner end of each form unit is rested upon a temporary supporting means located intermediately between the supporting walls, whereby to maintain the base walls of all form units in substantially coplanar relation to provide a decking of substantial area whereon fluid concrete may be spread to form a slab, the resting point of the fulcrum means upon the tops of the supporting walls being located toward their inner faces whereby to leave unoccupied a substantial area therebeyond, the arrangement being such that concrete, when poured in a fluid state over the decking provided by the base walls, will be free to spread beyond the outer ends thereof to rest directly upon the unoccupied portions of the supporting wall tops and, when set to form a solidified slab thereover with the temporary supporting means also removed, permitting downward swinging movement of each form unit upon its fulcrum means around a pivotal point at the top of the supporting wall therefor close to its inner face as an incident to removal of the form unit from between said wall and the concrete slab then resting thereupon and also upon the adjacent supporting wall top.
Claim 2
Dependent Claim
325 words
A form structure for production of a concrete slab two of whose opposite edge portions are to be rested upon the coplanar tops of spaced supporting walls to be carried thereby comprising a plurality of similar form units all provided with elongated base walls having lengths approximately half the span between the supporting walls, and the fulcrum means depending at one end thereof for elevating each base wall above the tops of the supporting wall therefor, half of the form units being arranged side by side in rows extending transversely of the supporting walls, along with a like number thereof disposed end to end in pairs arranged in parallelism with the supporting walls upon the tops of which the fulcrum means of the form units are adapted to be rested when the inner end of each form unit is rested upon a temporary supporting means located intermediately between the supporting walls, whereby to maintain the base walls of all form units in substantially coplanar relation to provide a decking of substantial area whereon fluid concrete may be spread to form a slab, the resting point of the fulcrum means upon the tops of the supporting walls being located toward their inner faces whereby to leave unoccupied a substantial area therebeyond, the arrangement being such that concrete, when poured in a fluid state over the decking provided by the base walls, will be free to spread beyond the outer ends thereof to rest directly upon the unoccupied portions of the supporting wall tops and, when set to form a solidified slab thereover with the temporary supporting means also removed, permitting downward swinging movement of each form unit upon its fulcrum means around a pivotal point at the top of the supporting wall therefor close to its inner face as an incident to removal of the form unit from between said wall and the concrete slab then resting thereupon and also upon the adjacent supporting wall top.
Claim 3
Dependent Claim
146 words
A form structure, as specified in claim 1, wherein the means fixedly joined to each base wall is a pair of vertical sidewalls depending therefrom along opposite edges thereof and interconnected by a cross wall at one end thereof, and wherein relatively narrow flanges are outturned along the bottom edges of the sidewalls to engage with the sidewalls of adjacent form units to maintain a minimum spacing therebetween when disposed in side-by-side relation, the space thus defined between each two rows of adjacent form units, when assembled into a common structure, being open at its top and closed by the flanges at its bottom and also at its ends proximate to the supporting walls therefor, whereby to receive concrete in a fluid state, when poured over the base walls, to produce, when set, a slab thereover having a joist depending therefrom to resist vertical deflection thereof.
Claim 4
Dependent Claim
114 words
A form structure, as specified in claim 2, wherein a number of like form units is arranged side by side in parallel rows with the flanges thereof maintaining a uniform spacing of their base and vertical walls lengthwise of each row, the spaces below the base walls of each pair of form units, when arranged end to end, being Continuous between sidewalls thereof and extending to the vertical cross walls at opposite ends of the paired form units, whereby concrete in a fluid state, when spread over the base walls to produce slab thereover, and on to adjacent unoccupied top portions of the supporting walls, will be excluded from entering into each such space.
Claim 5
Dependent Claim
138 words
A form structure, as specified in claim 2, wherein the vertical cross walls at their point of juncture with the base walls are contoured to eliminate corners thereat, and wherein the joists to be formed are united integrally with the to-be-formed overlying slab of concrete to provide therewith a monolithic structure which extends beyond opposite ends of the joists to rest directly upon unoccupied portions of the supporting wall tops, the several form units thereafter, upon removal of the intermediate supporting means therefrom, being free at their inner ends to swing downwardly whereby to move their cornerless ends freely through arcuate paths to occupy positions, relative to the overlying concrete slab then resting upon the tops of the supporting walls, from which each form unit may then be separated for removal from the form structure in its entirety.
Claim 6
Dependent Claim
74 words
A form structure, as specified in claim 2, wherein the juncture zone between each vertical sidewall and the base wall includes at least two closely spaced parallel bend lines totaling approximately 90* to permit substantially complete interengagement between the concrete, when poured, and 100 percent of the area of one face of each sidewall, when solidified, thereby to facilitate subsequent separation of each form unit from the concrete for dismantling of the form structure.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |