US4522284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite panel structure
Assignee: NORAEF ACQUISITION CORP A CORP OF OH
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Filing: 1983-04-20
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Granted: 1985-06-11
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Expires: 2003-04-20
Abstract
Abstract A panel having a cellular core and an acoustically semi-transparent facing is provided. The core, which may be a honeycomb, has cells opening to a face of the core. The facing is bonded to the face of the core such that pillow-like portions of the facing extend into the open cells of the core to provide a mechanical interlock between the facing and the core and to improve the absorption of acoustic energy directed upon the panel. The panel may include a layer bonded to the core opposite the facing for reducing the transmission of acoustic energy through the panel or for increasing its strength and rigidity. Preferably, the facing is non-homogeneous such that the density of the pillow-like portions is less than the portions of the facing adjacent the structure of the core. The panel may be formed by heating and compressing an uncured fibrous element of relatively uniform thickness and density against a cellular core. A heated platen may be used to produce a relatively flat, hardened outer surface of the panel.
Inventors
- 👤 William W. Fearon
- 👤 Arnel M. Macy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:46
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B; B29; B29D; B29D24/00; B29D24/002; B29D24/005; E04B1/8227; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; G; G10; G10K; G10K11/00; G10K11/16; G10K11/172; E04B2001/742; E04B2001/748; E04B2001/8423; E04B2001/8452; G10K11/162; G10K11/168; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
A composite panel structure having acoustical absorbing properties, comprising: a core having structure means forming cells open to at least one side of the core; and an acoustically semi-transparent facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the facing being bonded to the structure means at said open side of the core and having portions extending into the adjacent open cells of the core to a depth sufficient to provide a mechanical interlock between the facing and the core to increase the strength of the structure in resisting shear forces adjacent the facing, said portions of the facing being relatively soft and partially filling the adjacent open cells of the core to enhance absorption of acoustic energy directed upon the facing.
Claim 2
Dependent Claim
135 words
A composite panel structure having acoustical absorbing properties, comprising: a core having structure means forming cells open to at least one side of the core; and an acoustically semi-transparent facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the facing being bonded to the structure means at said open side of the core and having portions extending into the adjacent open cells of the core to a depth sufficient to provide a mechanical interlock between the facing and the core to increase the strength of the structure in resisting shear forces adjacent the facing, said portions of the facing being relatively soft and partially filling the adjacent open cells of the core to enhance absorption of acoustic energy directed upon the facing.
Claim 3
Dependent Claim
64 words
The composite panel structure of claim 1 wherein the structure means of the core is a honeycomb dividing the core into a plurality of cells, the facing being bonded to the honeycomb by the same binder bonding the fibers together, the density of the facing adjacent the honeycomb being greater than the density of the facing portions extending into the cells of the core.
Claim 4
Dependent Claim
42 words
The composite panel structure of claim 2 wherein the facing has a substantially planar outer surface, the thickness of the facing being greater at the portions extending into the cells of the core than the thickness of the facing adjacent the honeycomb.
Claim 5
Dependent Claim
46 words
The composite panel structure of claim 1 further comprising a non-porous layer bonded to a side of the core substantially opposite the side to which the facing is bonded, the non-porous layer serving as a barrier to reduce the transmission of sound energy through the structure.
Claim 6
Dependent Claim
34 words
The composite panel structure of claim 1 wherein the portion of the facing extending into the cells of the core is curved and the surface of the facing opposite the core is relatively flat.
Claim 7
Dependent Claim
173 words
A composite panel structure having acoustical absorbing properties, comprising: a core having wall means forming cells open to a first side and a second side thereof; an acoustically semi-transparent first facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the first facing being bonded to said first side of the core; and an acoustically semi-transparent second facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the second facing being bonded to said second side of the core, the facings having portions extending inwardly into the adjacent open cells of the core a depth sufficient to increase the strength of the structure in resisting shear forces adjacent the facings, the facings being non-homogeneous, said portions extending into the cells being of less density than the portions adjacent said cell wall means, the facings being relatively flat on the outwardly facing surfaces and curved on the inwardly facing surfaces.
Claim 8
Dependent Claim
173 words
A composite panel structure having acoustical absorbing properties, comprising: a core having wall means forming cells open to a first side and a second side thereof; an acoustically semi-transparent first facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the first facing being bonded to said first side of the core; and an acoustically semi-transparent second facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the second facing being bonded to said second side of the core, the facings having portions extending inwardly into the adjacent open cells of the core a depth sufficient to increase the strength of the structure in resisting shear forces adjacent the facings, the facings being non-homogeneous, said portions extending into the cells being of less density than the portions adjacent said cell wall means, the facings being relatively flat on the outwardly facing surfaces and curved on the inwardly facing surfaces.
Claim 9
Dependent Claim
210 words
A composite panel structure having acoustical absorbing properties, comprising: a first core having wall means forming cells; a second core having wall means forming cells; a septum of non-porous material interposed between and bonded to the first and second cores such that the first and second cores have cells open to a first side and a second side, respectively, for service as a barrier to reduce the transmission of acoustic energy from one of the cores to the other; an acoustically semi-transparent first facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the facing being bonded to said first side; and an acoustically semi-transparent second facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the facing being bonded to said second side, the first and second facings having portions extending inward into the adjacent open cells of the first and second cores to a depth sufficient to provide a mechanical interlock between the facings and the cores and to enhance absorption of acoustic energy, the facings having outwardly facing substantially parallel surfaces that are relatively flat and have inwardly facing surfaces that are curved.
Claim 10
Dependent Claim
210 words
A composite panel structure having acoustical absorbing properties, comprising: a first core having wall means forming cells; a second core having wall means forming cells; a septum of non-porous material interposed between and bonded to the first and second cores such that the first and second cores have cells open to a first side and a second side, respectively, for service as a barrier to reduce the transmission of acoustic energy from one of the cores to the other; an acoustically semi-transparent first facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the facing being bonded to said first side; and an acoustically semi-transparent second facing of fibrous material and a binder formed to provide a relatively hard outer surface of partially bonded fibers with interstices therebetween, the facing being bonded to said second side, the first and second facings having portions extending inward into the adjacent open cells of the first and second cores to a depth sufficient to provide a mechanical interlock between the facings and the cores and to enhance absorption of acoustic energy, the facings having outwardly facing substantially parallel surfaces that are relatively flat and have inwardly facing surfaces that are curved.
Claim 11
Dependent Claim
123 words
A composite panel structure having acoustical absorbing properties, comprising: a honeycomb core having wall means forming cells having a polygonal cross-section, the cells being open to a side of the core; and a fibrous facing of acoustically semi-transparent material bonded to the wall means at the open side of the core so as to bind together the fibers and form a quilt-like facing having pillow-like portions partially filling the cells and having a curved surface at the portions partially filling the cells and a relatively flat surface opposite the honeycomb core, said facing being made of a fibrous material and a urea-phenol formaldehyde resin thermosetting binder formed under heat and pressure to provide an outer surface of partially bonded fibers with interstices therebetween.
Claim 12
Dependent Claim
123 words
A composite panel structure having acoustical absorbing properties, comprising: a honeycomb core having wall means forming cells having a polygonal cross-section, the cells being open to a side of the core; and a fibrous facing of acoustically semi-transparent material bonded to the wall means at the open side of the core so as to bind together the fibers and form a quilt-like facing having pillow-like portions partially filling the cells and having a curved surface at the portions partially filling the cells and a relatively flat surface opposite the honeycomb core, said facing being made of a fibrous material and a urea-phenol formaldehyde resin thermosetting binder formed under heat and pressure to provide an outer surface of partially bonded fibers with interstices therebetween.
References Cited (Backward Citations)
US3166149A
Cited
US1172710A
Cited
US2113128A
Cited
US3021916A
Cited
US3095943A
Cited
US3249659A
Cited
US3380206A
Cited
FR2150511A1
Cited
US3831710A
Cited
US3913702A
Cited
US3934382A
Cited
US3948346A
Cited
US4084367A
Cited
US4021983A
Cited
US4167598A
Cited
US4155211A
Cited
US4265955A
Cited
US4275801A
Cited
US4213516A
Cited
US4300978A
Cited
US4318453A
Cited
US4269882A
Cited
US4301890A
Cited
US4294329A
Cited
US4353947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |