Patent US3759009A successfully refreshed from Google Patents.
US3759009A
Expired / Lapsed
US
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Composite load bearing panels
Assignee: GORDON T KINDER
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Filing: 1971-01-28
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Granted: 1973-09-18
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Expires: 1991-01-28
Abstract
Abstract Composite, load bearing panels comprising two thin metal sheets, preferably mild steel, having a low density cementatious core material therebetween. Each metal sheet has a plurality of integral keys pressed angularly outward the refrom to extend into the cementatious core material. The keys of one sheet, which extend to a depth greater than 50 per cent of the thickness of the core material, are alternately spaced in relation to the keys of the other sheet and act both as a mechanical bond for the sheets and the core material and as reinforcement to the panel giving it substantial strength in both tension and compression.
Inventors
- 👤 F Ransome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:17
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
A composite load bearing panel comprising two thin metal faces having a cementatious core material therebetween, each metal face having a plurality of integral keys positioned substantially 90* outward therefrom to extend into the core material to a depth of greater than 50 per cent of the core material thickness, the keys including a web portion extending from the metal face and terminating in a flange portion, at least one of the web portion and flange portion having a plurality of holes extending therethrough, said keys of one face being alternately spaced in relation to the keys of the other face and being in overlapping relationship so as to prevent failure by a straight shear plane, said keys acting both as a mechanical bond between the faces and the core material and as reinforcement of the panel giving said panel substantial strength in both tension and compression.
Claim 2
Dependent Claim
147 words
A composite load bearing panel comprising two thin metal faces having a cementatious core material therebetween, each metal face having a plurality of integral keys positioned substantially 90* outward therefrom to extend into the core material to a depth of greater than 50 per cent of the core material thickness, the keys including a web portion extending from the metal face and terminating in a flange portion, at least one of the web portion and flange portion having a plurality of holes extending therethrough, said keys of one face being alternately spaced in relation to the keys of the other face and being in overlapping relationship so as to prevent failure by a straight shear plane, said keys acting both as a mechanical bond between the faces and the core material and as reinforcement of the panel giving said panel substantial strength in both tension and compression.
Claim 3
Dependent Claim
37 words
The panel of claim 1 wherein the webs of said keys of each sheet have sides which angle toward each other away from the metal face and terminate in the flange to define a substantially T-shaped key.
Claim 4
Dependent Claim
56 words
The panel of claim 1 wherein said keys of each face are positioned in rows crosswise of said face, the keys of a given row in each face being staggered in relation to the keys of an adjacent row, said rows of one face aligning with the rows of the other face in alternating key relationship.
Claim 5
Dependent Claim
28 words
The panel of claim 1 wherein each metal face extends outwardly at 90* along at least one edge thereof to form panel sides to encapsulate the cementatious core.
Claim 6
Dependent Claim
34 words
The panel of claim 4 wherein at least one side has a free end to accommodate a free end of an adjacent panel to form a space therebetween, said space being filled with grout.
Claim 7
Dependent Claim
22 words
The panel of claim 1 wherein the metal faces are mild steel sheets having a thickness between 22 and 30 gauge, inclusive.
Claim 8
Dependent Claim
22 words
The panel of claim 6 wherein the cementatiouS core material has a density less than 50 lbs./cu.ft. and preferably below 20 lbs./cu.ft.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |