US4020205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural cores
Assignee: United States Department of the Army
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Filing: 1975-06-13
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Granted: 1977-04-26
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Expires: 1995-06-13
Abstract
Abstract Structural cores are quasi-isotropic load-carrying constructional elementsn the form of parallel rows of polyhedrons disposed in alternating sequence. These have been made from interwoven fibrous filaments, coated with plastic. Such structural cores are made herein from a continuous ribbon.
Inventors
- 👤 Philip J. Haselbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:34
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; Y; Y10; Y10S; Y10S52/00; Y10S52/10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24628; Y10T428/24661; Y10T428/24669
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
209 words
A structural core medium formed from structural core elements, each structural core element being a strip formed from a continuous ribbon, the ribbon being in the form of a series of offset sections, each section having bend lines defining the sides of six alternate upright and inverted triangular surfaces having the bend lines as common sides therebetween, the last triangular surface of each section having superimposed thereabove, with a common side therebetween, the first triangular surface of a subsequent section to form the next offset section, the triangular surfaces of each section being angularly disposed relative to each other by bends along the bend lines to form dihedral angles, the common sides between triangular surfaces forming the vertices of the dihedral angles, the triangular surfaces of each offset section forming two terminal and three internal dihedral angles, the terminal angles opening in one direction, the internal dihedral angles opening in the opposite direction, the superimposed triangular surfaces forming a dihedral section-connecting angle opening in the same general direction as the internal dihedral angles, and at least two offset sections thus bent forming said strip, the structural core medium resulting from two similarly bent strips being joined at their common sides to form a row of alternately offset open-faced tetrahedrons.
Claim 2
Dependent Claim
209 words
A structural core medium formed from structural core elements, each structural core element being a strip formed from a continuous ribbon, the ribbon being in the form of a series of offset sections, each section having bend lines defining the sides of six alternate upright and inverted triangular surfaces having the bend lines as common sides therebetween, the last triangular surface of each section having superimposed thereabove, with a common side therebetween, the first triangular surface of a subsequent section to form the next offset section, the triangular surfaces of each section being angularly disposed relative to each other by bends along the bend lines to form dihedral angles, the common sides between triangular surfaces forming the vertices of the dihedral angles, the triangular surfaces of each offset section forming two terminal and three internal dihedral angles, the terminal angles opening in one direction, the internal dihedral angles opening in the opposite direction, the superimposed triangular surfaces forming a dihedral section-connecting angle opening in the same general direction as the internal dihedral angles, and at least two offset sections thus bent forming said strip, the structural core medium resulting from two similarly bent strips being joined at their common sides to form a row of alternately offset open-faced tetrahedrons.
Claim 3
Dependent Claim
209 words
A structural core medium formed from structural core elements, each structural core element being a strip formed from a continuous ribbon, the ribbon being in the form of a series of offset sections, each section having bend lines defining the sides of six alternate upright and inverted triangular surfaces having the bend lines as common sides therebetween, the last triangular surface of each section having superimposed thereabove, with a common side therebetween, the first triangular surface of a subsequent section to form the next offset section, the triangular surfaces of each section being angularly disposed relative to each other by bends along the bend lines to form dihedral angles, the common sides between triangular surfaces forming the vertices of the dihedral angles, the triangular surfaces of each offset section forming two terminal and three internal dihedral angles, the terminal angles opening in one direction, the internal dihedral angles opening in the opposite direction, the surperimposed triangular surfaces forming a dihedral section-connecting angle opening in the same general direction as the internal dihedral angles, and at least two offset sections thus bent forming said strip, the structural core medium resulting from two conversely bent strips being joined at their common sides to form a row of alternately offset open-faced octahedrons.
Claim 4
Dependent Claim
209 words
A structural core medium formed from structural core elements, each structural core element being a strip formed from a continuous ribbon, the ribbon being in the form of a series of offset sections, each section having bend lines defining the sides of six alternate upright and inverted triangular surfaces having the bend lines as common sides therebetween, the last triangular surface of each section having superimposed thereabove, with a common side therebetween, the first triangular surface of a subsequent section to form the next offset section, the triangular surfaces of each section being angularly disposed relative to each other by bends along the bend lines to form dihedral angles, the common sides between triangular surfaces forming the vertices of the dihedral angles, the triangular surfaces of each offset section forming two terminal and three internal dihedral angles, the terminal angles opening in one direction, the internal dihedral angles opening in the opposite direction, the surperimposed triangular surfaces forming a dihedral section-connecting angle opening in the same general direction as the internal dihedral angles, and at least two offset sections thus bent forming said strip, the structural core medium resulting from two conversely bent strips being joined at their common sides to form a row of alternately offset open-faced octahedrons.
Claim 7
Dependent Claim
214 words
A structural core medium formed from structural core elements, each structural core element being a strip formed from a continuous ribbon, the ribbon being in the form of a series of offset sections, each section having bend lines defining the sides of six alternate upright and inverted triangular surfaces having the bend lines as common sides therebetween, the last triangular surface of each section having superimposed thereabove, with a common side therebetween, the first triangular surface of a subsequent section to form the next offset section, the triangular surfaces of each section being angularly disposed relative to each other by bends along the bend lines to form dihedral angles, the common sides between triangular surfaces forming the vertices of the dihedral angles, the triangular surfaces of each offset section forming two terminal and three internal dihedral angles, the terminal angles opening in one direction, the internal dihedral angles opening in the opposite direction, the superimposed triangular surfaces forming a dihedral section-connecting angle opening in the same general direction as the internal dihedral angles, and at least two offset sections thus bent forming said strip, the structural core medium resulting from similarly bent strips and conversely bent strips being alternately joined at their common sides to form alternate rows of offset, open-faced tetrahedrons and octahedrons.
Claim 8
Dependent Claim
214 words
A structural core medium formed from structural core elements, each structural core element being a strip formed from a continuous ribbon, the ribbon being in the form of a series of offset sections, each section having bend lines defining the sides of six alternate upright and inverted triangular surfaces having the bend lines as common sides therebetween, the last triangular surface of each section having superimposed thereabove, with a common side therebetween, the first triangular surface of a subsequent section to form the next offset section, the triangular surfaces of each section being angularly disposed relative to each other by bends along the bend lines to form dihedral angles, the common sides between triangular surfaces forming the vertices of the dihedral angles, the triangular surfaces of each offset section forming two terminal and three internal dihedral angles, the terminal angles opening in one direction, the internal dihedral angles opening in the opposite direction, the superimposed triangular surfaces forming a dihedral section-connecting angle opening in the same general direction as the internal dihedral angles, and at least two offset sections thus bent forming said strip, the structural core medium resulting from similarly bent strips and conversely bent strips being alternately joined at their common sides to form alternate rows of offset, open-faced tetrahedrons and octahedrons.
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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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |