Patent US4840828A successfully refreshed from Google Patents.
US4840828A
Expired / Lapsed
US
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Structural element formed of a resin-hardened velour fabric and fabrication method
Assignee: Vorwerk and Co Interholding GmbH
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Filing: 1988-07-15
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Granted: 1989-06-20
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Expires: 2008-07-15
Abstract
Abstract A structure based on velour fabric, having at least a first layer and a second layer and intermediate ribs connecting these layers provides a production-efficient, stable and nevertheless light-weight product. The velour fabric is made of a commercial yarn such as aramid fiber, carbon fiber, ceramic fiber or in particular glass fiber. The velour fabric is resin-hardened, wherein the intermediate ribs for rigid spacing elements between the first layer and the second layer.
Inventors
- 👤 Wolfgang Bottger
- 👤 Kurt Biedermann
- 👤 Werner Pensel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:44
CPC Classifications
D; D06; D06M; D06M17/00; D06N; D06N7/00; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/16; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/24; Y10T428/24025; Y10T428/24058; Y10T428/24074; Y10T428/24116; Y10T428/24124; Y10T428/24149; Y10T428/24174; Y10T428/24182; Y10T428/24802; Y10T428/2481; Y10T428/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
Structural element comprising a velour fabric formed of two generally parallel layers and intermediate ribs connected between and separating said layers, said intermediate ribs being formed of threads, said velour fabric being made of aramid fibers, carbon fibers, ceramic fibers or glass fibers, and a hardened resin impregnated within said velour fabric.
Claim 2
Dependent Claim
52 words
Structural element comprising a velour fabric formed of two generally parallel layers and intermediate ribs connected between and separating said layers, said intermediate ribs being formed of threads, said velour fabric being made of aramid fibers, carbon fibers, ceramic fibers or glass fibers, and a hardened resin impregnated within said velour fabric.
Claim 3
Dependent Claim
22 words
Structural element according to claim 1, wherein the medium-sized length of said threads is greater than the distance (x) between said layers.
Claim 4
Dependent Claim
19 words
Structural element according to claim 1, wherein said threads extend between said layers at an angle other than 90°.
Claim 5
Dependent Claim
23 words
Structural element according to claim 3, wherein the intermediate threads extend at an angle (alpha) of about 65° with respect to said layers.
Claim 6
Dependent Claim
23 words
Structural element according to claim 3, wherein the intermediate threads extend at an angle (alpha) of about 85° with respect to said layers.
Claim 7
Dependent Claim
16 words
Structural element according to claim 1, wherein said intermediate ribs comprise two slightly twisted single threads.
Claim 8
Dependent Claim
20 words
Structural element according to claim 6, wherein said intermediate ribs comprise individual ribs twisted in the shape of an 8.
Claim 9
Dependent Claim
24 words
Structural element according to claim 6, wherein said intermediate ribs are formed of threads which are connected to one another at a crossing-over region.
Claim 10
Dependent Claim
21 words
Structural element according to claim 1, wherein the intermediate ribs have prop-like transition regions in the outlet region of the layers.
Claim 11
Dependent Claim
18 words
Structural element according to claim 1, wherein the intermediate ribs are arranged alternately at larger and smaller intervals.
Claim 12
Dependent Claim
13 words
Structural element according to claim 1, including intermediate ribs formed of crossed threads.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |