Patent US4575984A successfully refreshed from Google Patents.
US4575984A
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Construction element
Assignee: IMEX AG
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Filing: 1983-06-09
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Granted: 1986-03-18
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Expires: 2003-06-09
Abstract
Abstract A construction element for constructing a supporting floor or the like consists of a slab made of reinforced concrete. The side walls of the slab are provided with protection profiles connected with each other. Two series of aligned, alternating projections and complementary recesses are lying above each other on each side wall of the slab, wherein the projections of one of the series are staggered with respect to the projections of the other series in such a manner that the recesses of one of the series lie above respectively below the projections of the other series. The projections of the lower series lie at a distance from the lower surface of the slab. As the construction elements forming a supporting floor are connected with each other by the interlocking projections and recesses of the adjacent side walls, the load of a construction element is distributed over the adjacent construction elements so that each construction element can take up a very high load.
Inventors
- 👤 Gijsbert Versteeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:55
CPC Classifications
E; E01; E01C; E01C5/00; E01C5/06; E01C5/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
176 words
Construction element for constructing a supporting floor or the like, comprising a slab made of reinforced concrete having an upper and a lower surface, each of the side walls of the slab being provided with an upper and lower series of aligned, alternating projections and complementary recesses, each projection having an upper and a lower surface, the bottom wall of each recess being flush with the corresponding side wall of the slab, wherein the recesses of the upper series lie above the projections of the lower series, wherein the recesses of the lower series lie below the projections of the upper series and, wherein the recesses and projections of the lower series lie at a distance from the lower surface of the slab, and wherein the side walls of the slab are provided with protection profiles connected with each other, the projections being carried by the protection profiles and wherein a corner plate is mounted in each corner formed by two of said protection profiles joining each other, a hole being formed in each corner plate.
Claim 2
Dependent Claim
176 words
Construction element for constructing a supporting floor or the like, comprising a slab made of reinforced concrete having an upper and a lower surface, each of the side walls of the slab being provided with an upper and lower series of aligned, alternating projections and complementary recesses, each projection having an upper and a lower surface, the bottom wall of each recess being flush with the corresponding side wall of the slab, wherein the recesses of the upper series lie above the projections of the lower series, wherein the recesses of the lower series lie below the projections of the upper series and, wherein the recesses and projections of the lower series lie at a distance from the lower surface of the slab, and wherein the side walls of the slab are provided with protection profiles connected with each other, the projections being carried by the protection profiles and wherein a corner plate is mounted in each corner formed by two of said protection profiles joining each other, a hole being formed in each corner plate.
Claim 3
Dependent Claim
26 words
Construction element according to claim 1 wherein the upper surface of the projections of the upper series are flush with the upper surface of the slab.
Claim 4
Dependent Claim
20 words
Construction element according to claim 1 wherein the length of a projection is smaller than the length of a recess.
Claim 5
Dependent Claim
62 words
Construction element according to claim 1 wherein the projections comprise end faces at their longitudinal ends, said end faces enclosing an angle of approximately 45° with the corresponding side wall of the slab, wherein the length of the outer end of each projection directed away from the slat is substantially equal to the length of each recess at the bottom wall thereof.
Claim 6
Dependent Claim
32 words
Construction element according to claim 1 wherein the protection profiles consist of U-sections, the webs of which form the side walls of the slab, the massive projections being fixed on these webs.
Claim 7
Dependent Claim
19 words
Construction element according to claim 1 wherein each protection profile with the corresponding projections is made in one piece.
Claim 8
Dependent Claim
18 words
Construction element according to claim 1 wherein the reinforcement of the concrete is connected with the protection profiles.
Claim 9
Dependent Claim
37 words
Construction element according to claim 7, wherein at least one short U-section with a lower height than the protection profile is fixed on the inner side of each protection profile for supporting the reinforcement of the concrete.
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |