US4769968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truss-core corrugation for compressive loads
Assignee: National Aeronautics and Space Administration
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Filing: 1987-03-05
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Granted: 1988-09-13
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Expires: 2007-03-05
Abstract
Abstract A corrugated panel structure for supporting compressive loads includes curved cap strips 22 separated by truss-core web segments 30. The truss-core web segments 30 are formed from first and second flat panels 32 and 34 with a corrugated filler 36 therebetween. The corrugated filler 36 extends in the direction of the compressive load, thereby providing load carrying capability for the compressive load. As a result, all components of the panel structure have a compressive load carrying capability resulting in a high strength-to-weight ratio when the compressive load is limiting.
Inventors
- 👤 Randall C. Davis
- 👤 L. Robert Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:26
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/06; B64C1/12; E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/34; E04C2/3405; B64C2001/0054; B64C2001/0072; B64C2001/0081; E04C2002/3444; E04C2002/345; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
A corrugated panel structure for supporting a compressive load in a length direction, comprising: cap strips extending in the length direction, having a curved cross-section; and truss-core web segments, bonded to and separating said cap strips in an open cross-section arrangement each truss-core web segment having a sandwich construction, including first and second flat panels parallel to the length direction and a corrugated filler, bonded between said first and second flat panels, extending in the length direction with a non-linear cross-section.
Claim 2
Dependent Claim
81 words
A corrugated panel structure for supporting a compressive load in a length direction, comprising: cap strips extending in the length direction, having a curved cross-section; and truss-core web segments, bonded to and separating said cap strips in an open cross-section arrangement each truss-core web segment having a sandwich construction, including first and second flat panels parallel to the length direction and a corrugated filler, bonded between said first and second flat panels, extending in the length direction with a non-linear cross-section.
Claim 3
Dependent Claim
18 words
A corrugated panel structure as recited in claim 1, wherein said corrugated filler has a substantially saw-toothed cross-section.
Claim 4
Dependent Claim
18 words
A corrugated panel structure as recited in claim 1, wherein said corrugated filler has a substantially sinusoidal cross-section.
Claim 5
Dependent Claim
44 words
A corrugated panel structure as recited in claim 1, wherein said cap strips have a first side bonded to said truss-core web segments and the curved cross-section of each of said cap strips forms an apex on a second side opposite the first side.
Claim 6
Dependent Claim
28 words
A corrugated panel structure as recited in claim 1, wherein the cross-section of each of said cap strips has an apex formed between two of said truss-core segments.
Claim 7
Dependent Claim
78 words
A corrugated panel structure as recited in claim 1, wherein said first and second flat panels are offset in a width direction perpendicular to the length direction, said first flat panel thereby including a first extension extending beyond said second flat panel at one side of each of said truss-core web segments and said second flat panel including a second extension extending beyond said first flat panel at an opposite side of each of said truss-core web segments.
Claim 8
Dependent Claim
63 words
A corrugated panel structure as recited in claim 6, wherein said first and second flat panels each have an inside and an outside, the inside being bonded to said corrugated filler, and wherein each of said cap strips include third and fourth extensions, each bonding to the outside of one of said first and second panels of one of said truss-core web segments.
Claim 9
Dependent Claim
40 words
A corrugated panel structure as recited in claim 6, wherein said first and second panels each include a flange, formed on one of said first and second extensions of said first and second panels, for bonding to said cap strips.
Claim 10
Dependent Claim
44 words
A corrugated panel structure as recited in claim 8, wherein said cap strips have a first side bonded to said truss-core web segments and the curved cross-section of each of said cap strips forms an apex on a second side opposite the first side.
Claim 11
Dependent Claim
28 words
A corrugated panel structure as recited in claim 8, wherein the cross-section of each of said cap strips has an apex formed between two of said truss-core segments.
Claim 12
Dependent Claim
102 words
A corrugated panel structure for supporting a compressive load in a length direction, comprising: cap strips extending in the length direction, having a curved cross-section with an apex; and truss-core web segments, bonded to and separating said cap strips, the apex of the curved cross-section of each of said cap strips being formed between two of said truss-core web segments, each of said truss-core web segments having a sandwich construction, including first and second flat panels parallel to the length direction and a corrugated filler, bonded between said first and second flat panels, extending in the length direction with a non-linear cross-section.
Claim 13
Dependent Claim
102 words
A corrugated panel structure for supporting a compressive load in a length direction, comprising: cap strips extending in the length direction, having a curved cross-section with an apex; and truss-core web segments, bonded to and separating said cap strips, the apex of the curved cross-section of each of said cap strips being formed between two of said truss-core web segments, each of said truss-core web segments having a sandwich construction, including first and second flat panels parallel to the length direction and a corrugated filler, bonded between said first and second flat panels, extending in the length direction with a non-linear cross-section.
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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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |