Patent US4615605A successfully refreshed from Google Patents.
US5741574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truss reinforced foam core sandwich
Assignee: Vencore Services and Solutions Inc
•
Filing: 1995-05-03
•
Granted: 1998-04-21
•
Expires: 2015-05-03
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 to form a combined foam/tow member core wherein the compressive strength or shear strength of the combined foam/tow member core is greater than the compressive strength or shear strength, respectively, of the foam core alone or the tow members alone forming a support structure within the foam core between the face sheets.
Inventors
- 👤 Joseph Santin Boyce
- 👤 Glenn Alexander Freitas
- 👤 Thomas Gerard Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:06
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: 7
Claim 1
Independent Claim
96 words
A reinforced foam core sandwich structure comprising: opposing multi-layer laminate face sheets; a foam core therebetween; and a plurality of discrete supporting tow members encapsulated within said foam core forming a support structure therein, at least a number of said tow member extending into said face sheets to anchor the face sheets to the foam core to form a combined foam/tow member core wherein the compressive strength or shear strength of the combined foam/tow member core is greater than the compressive strength or shear strength, respectively, of the foam core alone or the tow members alone.
Claim 2
Dependent Claim
96 words
A reinforced foam core sandwich structure comprising: opposing multi-layer laminate face sheets; a foam core therebetween; and a plurality of discrete supporting tow members encapsulated within said foam core forming a support structure therein, at least a number of said tow member extending into said face sheets to anchor the face sheets to the foam core to form a combined foam/tow member core wherein the compressive strength or shear strength of the combined foam/tow member core is greater than the compressive strength or shear strength, respectively, of the foam core alone or the tow members alone.
Claim 3
Dependent Claim
36 words
The reinforced foam core sandwich structure 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 4
Dependent Claim
20 words
The reinforced foam core sandwich structure of claim 2 in which said truss structure includes a number of X-braced members.
Claim 5
Dependent Claim
24 words
The reinforced foam core sandwich structure of claim 1 in which a number of said tow members are disposed perpendicularly between said face sheets.
Claim 6
Dependent Claim
94 words
A reinforced foam core sandwich structure comprising: opposing face sheets; a foam core therebetween; and a plurality of discrete supporting tow members encapsulated within said foam core forming a support structure therein, at least a number of said tow member extending into said face sheets to anchor the face sheets to the foam core to form a combined foam/tow member core wherein the compressive strength or shear strength of the combined foam/tow member core is greater than the compressive strength or shear strength, respectively, of the foam core alone or the tow members alone.
Claim 7
Dependent Claim
94 words
A reinforced foam core sandwich structure comprising: opposing face sheets; a foam core therebetween; and a plurality of discrete supporting tow members encapsulated within said foam core forming a support structure therein, at least a number of said tow member extending into said face sheets to anchor the face sheets to the foam core to form a combined foam/tow member core wherein the compressive strength or shear strength of the combined foam/tow member core is greater than the compressive strength or shear strength, respectively, of the foam core alone or the tow members alone.
References Cited (Backward Citations)
US2557668A
Cited
US3122465A
Cited
US3031349A
Cited
US3394283A
Cited
US3243332A
Cited
US3146141A
Cited
US3328218A
Cited
US3357090A
Cited
US3367809A
Cited
US3440117A
Cited
US3401861A
Cited
US3480492A
Cited
US3460238A
Cited
US3579411A
Cited
US3538668A
Cited
US3719212A
Cited
US3666599A
Cited
US3750355A
Cited
US3837985A
Cited
US3900651A
Cited
US4027370A
Cited
US4109435A
Cited
US4136226A
Cited
US4274901A
Cited
US4172916A
Cited
EP0009403A1
Cited
US4247345A
Cited
GB2040805A
Cited
US4328272A
Cited
JPS55121027A
Cited
US4299871A
Cited
DE3027217A1
Cited
US4350728A
Cited
US4373653A
Cited
US4361613A
Cited
US4556591A
Cited
US4556592A
Cited
DE3147228A1
Cited
US4582740A
Cited
US4469470A
Cited
US4426414A
Cited
US4528051A
Cited
DE3246803A1
Cited
US4567076A
Cited
US4637947A
Cited
DE3531519A1
Cited
US4622091A
Cited
US4786343A
Cited
US4679291A
Cited
US4761871A
Cited
US4798639A
Cited
US4863551A
Cited
US4808461A
Cited
US5021280A
Cited
US4910067A
Cited
US5102723A
Cited
US5108830A
Cited
US5345738A
Cited
US5466506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-20 | 2001-10-20 | 2002-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-20 | 2005-10-20 | 2006-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-20 | 2009-10-20 | 2010-04-21 | $7700.00 | Window Closed / Lapsed |