US4554766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling construction for clean rooms
Assignee: ABB Technology FLB AB
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Filing: 1984-08-20
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Granted: 1985-11-26
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Expires: 2004-08-20
Abstract
Abstract Ceiling construction for clean rooms in which beneath a main ceiling (3) a lower ceiling (18) is mounted which is formed by a light and air permeable capillary structure (19), so that, with a high light transmission factor in respect of optimal and simultaneously dazzle free illumination of the clean room a turbulence-free laminar air flow is possible in the clean room.
Inventors
- 👤 Wolf Ziemer
- 👤 Wilhelm Holle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:31
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
Ceiling construction for clean rooms comprising: an intermediate ceiling arranged at a spacing beneath a raw ceiling to form a pressure chamber, which intermediate ceiling is formed from heavy duty mechanical filters: a lower ceiling arranged at a spacing beneath the intermediate ceiling to form an air distribution chamber, which lower ceiling is formed from laminar elements having vertical passages for a vertically downwardly directed air flow: and ceiling lamps, wherein the laminar elements of the lower ceiling are formed by a capillary structure which is both air permeable and also light permeable, and the ceiling lamps are installed above the lower ceiling between the mechanical filters.
Claim 2
Dependent Claim
107 words
Ceiling construction for clean rooms comprising: an intermediate ceiling arranged at a spacing beneath a raw ceiling to form a pressure chamber, which intermediate ceiling is formed from heavy duty mechanical filters: a lower ceiling arranged at a spacing beneath the intermediate ceiling to form an air distribution chamber, which lower ceiling is formed from laminar elements having vertical passages for a vertically downwardly directed air flow: and ceiling lamps, wherein the laminar elements of the lower ceiling are formed by a capillary structure which is both air permeable and also light permeable, and the ceiling lamps are installed above the lower ceiling between the mechanical filters.
Claim 3
Dependent Claim
33 words
Ceiling construction according to claim 1, wherein capillary structure of the capillary plates has capillary tubes which are approximately 1 mm wide and about 50 mm long with approximately 85% exposed outer surface.
Claim 4
Dependent Claim
31 words
Ceiling construction according to claim 2, wherein the intermediate ceiling is provided with a connection plate profile for the connection to a clean room wall in a manner sealed against particles.
Claim 5
Dependent Claim
14 words
Ceiling construction according to claim 2, wherein capillary structure plates are manufactured of polycarbonate.
Claim 6
Dependent Claim
30 words
Ceiling construction according to claim 1, wherein the intermediate ceiling comprises a frame construction in which the source and lamps elements are installed to form a system sealed against particles.
Claim 7
Dependent Claim
21 words
Ceiling construction according to claim 5, wherein the dimensions of the frame construction correspond to the European frame size 600×600 mm.
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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |