US3615974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate-shaped structural elements filled with expanded material
Assignee: Individual
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Filing: 1968-07-08
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Granted: 1971-10-26
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Expires: 1988-07-08
Abstract
Abstract A structural element and a method of making the same. A plate member consists of a material having inherently low bending resistance and is provided with a plurality of spaced reinforcing ribs which project from at least one major surface of the plate member. The ribs are hollow and define internal passages. Bodies of solidified flowable material are introduced into and fill these passages for the purpose of reinforcing the ribs and thereby the plate member.
Inventors
- 👤 Roderich W Graeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/22; B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/18; B29C44/181; B29C70/00; B29C70/04; B29C70/06; B29C70/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
A method as defined in claim 1, comprising the step of inserting into said passages respective perforated tubes for thereby moving said layers apart in said zones; and introducing said flowable material into said tubes to fill the latter and penetrate through the perforations thereof so as to fill interstices surrounding the tubes and further expand said plate member in said zones for obtaining said ribs.
Claim 2
Dependent Claim
39 words
A method as defined in claim 1, and comprising the step of disposing between said layers in said zones prior to bonding of the surfaces to one another, types of a material which does not bond with said layers.
Claim 3
Dependent Claim
50 words
A method as defined in claim 1, said plate member having two major outwardly direct surfaces; and further comprising the step of forming said plate member before expanding prior to expanding with grooves indented inwardly of one of said major surfaces and extending in direction of said zones coextensively therewith.
Claim 4
Dependent Claim
59 words
A method as defined in claim 4, wherein the thickness of one of said layers at least in the region of said zones is less than the thickness of the other layer to assure that on expansion of the material of said plate member said ribs expand only in direction of the major surface associated with said one layer.
Claim 5
Dependent Claim
51 words
A method as defined in claim 6, wherein said one layer is provided with said one major surface, and wherein the thickness of said one layer is less than the thickness of the other layer at least in the region of the respective grooves indented inwardly of said one major surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |