US3834487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sandwich core panel with structural decoupling between the outer face sheets thereof
Assignee: Individual
•
Filing: 1973-03-08
•
Granted: 1974-09-10
•
Expires: 1993-03-08
Abstract
Abstract A sandwich core panel is formed from an inner and an outer pair of face sheets which are spaced from each other and having core structures formed from first and second anticlastic membranes respectively sandwiched therebetween. The membranes each have a first set of nodes which project in a first direction and a second set of nodes which project in a direction opposite to the first direction. The nodes of the first set have end faces of a smaller diameter than the end portions of the second set. The end face portions of the second set of nodes of both membranes have apertures formed therein such that the end portions of the first sets of nodes of each of the membranes pass through the node end portions of the other membrane. The end face portions of the first set of nodes for each of the membranes is adhered to the inner surface of a respective one of the outer face sheets, while the end portions of the other set of nodes of each of the membranes is adhered to the inner surface of a respective one of the inner face sheets. This arrangement provides a structurally rigid unit having a high strength to weight ratio with decoupling between the face sheets such that the transfer of energy therebetween is attenuated.
Inventors
- 👤 J Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:21
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/3405; B32B2307/00; B32B2307/10; B32B2307/102; B32B2607/00; E04B2001/8423; E04B2001/8428; E04B2001/8457; E04B2001/8461; E04B2001/8471; E04B2001/8476; E04C2002/3411; E04C2002/3433; E04C2002/3438; E04C2002/3472; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24628; Y10T428/24661
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
278 words
A sandwich core panel structure comprising: first and second outer face sheets, first and second inner face sheets, said inner face sheets having a plurality of spaced apertures formed therein, a first anticlastic membrane having a first set of nodes projecting in a first direction and a second set of nodes projecting in a direction opposite to said first direction, a second anticlastic membrane having a first set of nodes projecting in said opposite direction and a second set of nodes porjecting in said first direction, the nodes of said second sets of nodes having end faces with a greater diameter than the end faces of the first sets of nodes, means for connecting said first and second outer face sheets to said first and second inner face sheets respectively at the edges thereof with their broad surfaces opposite to each other in spaced relationship, the end faces of said second set of nodes of said first and second membranes having apertures formed therein and being adhered to said first and second inner face sheets respectively at the portions thereof surrounding the apertures formed in said inner face sheets, the end faces of the first set of nodes of said first and second membranes passing through the apertures in the second set of nodes of said second and first membranes and said second and first inner face sheets respectively, the end faces of the first set of nodes of said first and second membranes being adhered to said second and first outer face sheets respectively, whereby said membranes are interleaved with each other in spaced relationship and said outer face sheets are substantially acoustically decoupled from each other.
Claim 2
Dependent Claim
278 words
A sandwich core panel structure comprising: first and second outer face sheets, first and second inner face sheets, said inner face sheets having a plurality of spaced apertures formed therein, a first anticlastic membrane having a first set of nodes projecting in a first direction and a second set of nodes projecting in a direction opposite to said first direction, a second anticlastic membrane having a first set of nodes projecting in said opposite direction and a second set of nodes porjecting in said first direction, the nodes of said second sets of nodes having end faces with a greater diameter than the end faces of the first sets of nodes, means for connecting said first and second outer face sheets to said first and second inner face sheets respectively at the edges thereof with their broad surfaces opposite to each other in spaced relationship, the end faces of said second set of nodes of said first and second membranes having apertures formed therein and being adhered to said first and second inner face sheets respectively at the portions thereof surrounding the apertures formed in said inner face sheets, the end faces of the first set of nodes of said first and second membranes passing through the apertures in the second set of nodes of said second and first membranes and said second and first inner face sheets respectively, the end faces of the first set of nodes of said first and second membranes being adhered to said second and first outer face sheets respectively, whereby said membranes are interleaved with each other in spaced relationship and said outer face sheets are substantially acoustically decoupled from each other.
Claim 3
Dependent Claim
30 words
The device of claim 1 wherein the means for separating said inner and outer face sheets from each other comprises spacer tab members spaced along edges of said face sheets.
Claim 4
Dependent Claim
235 words
A sandwich core panel structure comprising: a first anticlastic membrane having a first set of nodes projecting in a first direction and a second set of nodes projecting in a direction opposite to said first direction, a second anticlastic membrane having a first set of nodes projecting in said opposite direction and a second set of nodes projecting in said first direction, the end faces of the second sets of nodes having a greater diameter than that of the first sets of nodes and having apertures formed therein, the nodes of said membranes being interleaved with each other in spaced relationship with the first set of nodes of each membrane passing through the apertures in the second set of nodes of the other membrane, first and second outer face sheets spaced from each other in opposing relationship, the membranes being sandwiched between said outer face sheets with the end faces of the first set of nodes of said first and second membranes being adhered to said second and first outer face sheets respectively, and first and second inner face sheets spaced from each other in opposing relationship between said outer face sheets, said inner face sheets having apertures formed therein through which the end portions of said first set of nodes pass, the end faces of said second sets of nodes being adhered to said inner face sheets at the portions thereof surrounding said apertures.
Claim 5
Dependent Claim
235 words
A sandwich core panel structure comprising: a first anticlastic membrane having a first set of nodes projecting in a first direction and a second set of nodes projecting in a direction opposite to said first direction, a second anticlastic membrane having a first set of nodes projecting in said opposite direction and a second set of nodes projecting in said first direction, the end faces of the second sets of nodes having a greater diameter than that of the first sets of nodes and having apertures formed therein, the nodes of said membranes being interleaved with each other in spaced relationship with the first set of nodes of each membrane passing through the apertures in the second set of nodes of the other membrane, first and second outer face sheets spaced from each other in opposing relationship, the membranes being sandwiched between said outer face sheets with the end faces of the first set of nodes of said first and second membranes being adhered to said second and first outer face sheets respectively, and first and second inner face sheets spaced from each other in opposing relationship between said outer face sheets, said inner face sheets having apertures formed therein through which the end portions of said first set of nodes pass, the end faces of said second sets of nodes being adhered to said inner face sheets at the portions thereof surrounding said apertures.
Claim 6
Dependent Claim
38 words
The structure of claim 4 and including spacer tab members attached to edge portions of said inner and outer face sheets for holding each of said inner face sheets to an associated one of said outer face sheets.
References Cited (Backward Citations)
US2481046A
Cited
US3013641A
Cited
US3108924A
Cited
US3227598A
Cited
US3525663A
Cited
US3479779A
Cited
US3527664A
Cited
US3663346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |