Patent US4931340A successfully refreshed from Google Patents.
US4931340A
Expired / Lapsed
US
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Honeycomb panel structure
Assignee: SMITOMO LIGHT METAL INUDSTRIES Ltd
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Filing: 1986-12-22
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Granted: 1990-06-05
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Expires: 2006-12-22
Abstract
Abstract A honeycomb panel structure for thermal and acoustic insulation and for load bearing capability has a honeycomb panel which comprises a honeycomb core laminated with two facing plates, and a pair of housings. Each housing has a channel to engage and support a edge of the honeycomb panel. A first neutral axis passes through the center of gravity of the honeycomb panel and extends in the direction of the panel. A second neutral axis passes through the centers of gravity of the housings and extends parallel to the first neutral axis. The first and second neutral axes are spaced apart in a vertical direction so that the structure has much higher flexural rigidity.
Inventors
- 👤 Takeaki Baba
- 👤 Keizo Nanba
- 👤 Yoshio Takeshima
- 👤 Hiromichi Sano
- 👤 Koji Tobita
- 👤 Atsuo Muneto
- 👤 Toshihiro Hara
- 👤 Kazuki Fujise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:36
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B32B15/00; B32B15/01; B32B15/20; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B29/00; B32B29/002; B32B29/005; B32B7/00; B32B7/04; B32B7/12; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; B32B2305/00; B32B2305/02; B32B2305/024; B32B2605/00; B32B2605/08; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/236; Y10T428/24; Y10T428/24149; Y10T428/24777
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
A honeycomb panel structure comprising: a honeycomb panel having a honeycomb core, and two facing plates attached to the upper and lower surfaces, respectively, of said core, said honeycomb panel having a first neutral axis which passes through the center of gravity of, and extends in the longitudinal direction of, said panel; and a pair of housings each having a base portion and two parallel projections extending from said base portion which form an engagement channel of substantially uniform cross-section therebetween for engaging said panel without deformation of said core, said base portion for each of said housings extending beyond said projections in a non-parallel direction such that said pair of housings has a second neutral axis which passes through the centers of gravity of said pair of housings parallel to said first neutral axis and spaced from said first neutral axis by a predetermined distance in the direction of loading, thereby providing said panel structure with increased flexural rigidity.
Claim 2
Dependent Claim
160 words
A honeycomb panel structure comprising: a honeycomb panel having a honeycomb core, and two facing plates attached to the upper and lower surfaces, respectively, of said core, said honeycomb panel having a first neutral axis which passes through the center of gravity of, and extends in the longitudinal direction of, said panel; and a pair of housings each having a base portion and two parallel projections extending from said base portion which form an engagement channel of substantially uniform cross-section therebetween for engaging said panel without deformation of said core, said base portion for each of said housings extending beyond said projections in a non-parallel direction such that said pair of housings has a second neutral axis which passes through the centers of gravity of said pair of housings parallel to said first neutral axis and spaced from said first neutral axis by a predetermined distance in the direction of loading, thereby providing said panel structure with increased flexural rigidity.
Claim 3
Dependent Claim
18 words
The honeycomb panel structure of claim 1 wherein said housing serves as a frame of an automotive vehicle.
Claim 4
Dependent Claim
19 words
The honeycomb panel structure of claim 2 wherein said honeycomb panel serves as a floor member of said vehicle.
Claim 5
Dependent Claim
30 words
The honeycomb panel structure of claim 1 wherein said engagement channels have varying widths and a plurality of said honeycomb panels having various thicknesses are engaged in said engagement channels.
Claim 6
Dependent Claim
17 words
The honeycomb panel structure of claim 1 wherein said housing serves as a frame of a construction.
Claim 7
Dependent Claim
18 words
The honeycomb panel structure of claim 5 wherein said honeycomb panel serves as a floor of said construction.
Claim 8
Dependent Claim
22 words
The honeycomb panel structure of claim 1 wherein said base portion extends in a substantially perpendicular direction with respect to said projections.
References Cited (Backward Citations)
US2126278A
Cited
US3476422A
Cited
US3814655A
Cited
US3709161A
Cited
US3769767A
Cited
US4020207A
Cited
US3998024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |