US5624622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a truss reinforced foam core sandwich structure
Assignee: Vencore Services and Solutions Inc
•
Filing: 1996-02-07
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Granted: 1997-04-29
•
Expires: 2016-02-07
Abstract
Abstract A reinforced foam core sandwich structure including opposing face sheets, a foam core therebetween, and tow members encapsulated within the foam core and extending between the opposing face sheets forming a support structure within the foam core between the face sheets.
Inventors
- 👤 Joseph S. Boyce
- 👤 Glenn A. Freitas
- 👤 Thomas G. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:52
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/569; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/083; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/22; E04C2/26; E04C2/284; E04C2/296; B32B2305/00; B32B2305/02; B32B2305/022; B32B2305/08; B32B2305/10; B32B2305/18; B32B2307/00; B32B2307/50; B32B2307/542; B32B2607/00; B32B38/00; B32B38/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49835; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/23907; Y10T428/23914; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24116; Y10T428/24174; Y10T428/249921; Y10T428/249923; Y10T428/249953; Y10T428/24996; Y10T428/249986
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
A method of fabricating a reinforced foam core sandwich structure comprising: disposing a plurality of discrete supporting tow members within a foam core, at least a number of said tow members each extending between the outer surfaces of said foam core; assembling face sheets on the opposing faces of said foam core; and compressing said foam core to drive said tow members into said face sheets.
Claim 2
Independent Claim
66 words
A method of fabricating a reinforced foam core sandwich structure comprising: disposing a plurality of discrete supporting tow members within a foam core, at least a number of said tow members each extending between the outer surfaces of said foam core; assembling face sheets on the opposing faces of said foam core; and compressing said foam core to drive said tow members into said face sheets.
Claim 3
Dependent Claim
31 words
The method of claim 1 in which said foam core includes outer compactable layers of a first density and an interior layer of a second density greater than said first density.
Claim 4
Dependent Claim
34 words
The method of claim 1 in which said face sheets are dry fabric and said method further includes wetting said fabric with resin after compressing said foam core and then curing said face sheets.
Claim 5
Dependent Claim
27 words
The method of claim 1 in which said face sheets are a prepreg material and said method further includes curing said structure after compressing said foam core.
Claim 6
Dependent Claim
23 words
The method of claim 1 in which said tow members are rigid rods of multifilamentary bundles preimpregnated with a resin and then cured.
Claim 7
Dependent Claim
32 words
The method of claim 1 in which a number of said tow members form a shear bearing truss structure within said foam core for reinforcing the shear strength of the sandwich structure.
Claim 8
Dependent Claim
16 words
The method of claim 6 in which said truss structure includes a number of X-braced chords.
Claim 9
Dependent Claim
20 words
The method of claim 6 in which a number of said tow members are disposed perpendicularly between said face sheets.
Claim 10
Dependent Claim
18 words
The method of claim 1 in which compressing said foam core includes applying pressure to said face sheets.
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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) | 2000-04-28 | 2000-10-28 | 2001-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-28 | 2004-10-28 | 2005-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-28 | 2008-10-28 | 2009-04-29 | $7700.00 | Window Closed / Lapsed |