US3686836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust-free work station with two crossed laminar flows
Assignee: Individual
•
Filing: 1970-06-22
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Granted: 1972-08-29
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Expires: 1990-06-22
Abstract
Abstract A dust-free work station according to the invention comprises a working space limited inter alia by a substantially horizontal lower surface and apertured side walls, and provided with a passage in front. Means are provided for establishing two laminar flows of air, i.e., horizontally between side walls and vertically through said passage.
Inventors
- 👤 Pierre Rabilloud
- 👤 Jean-Claude Guichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:42
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/16; F24F3/163; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A dust-free work station comprising, for the purpose of bounding a working space, a set of walls including a generally horizontal work surface having an access opening to said surface in a non-horizontal side of said walls, means for producing a first laminar air current within said space above said work surface moving generally horizontally from one wall side to an opposite wall side, and means for producing a second curtain-like laminar current of air, distinct from said first current, passing in a generally vertical direction over said access opening outside said work space.
Claim 2
Dependent Claim
94 words
A dust-free work station comprising, for the purpose of bounding a working space, a set of walls including a generally horizontal work surface having an access opening to said surface in a non-horizontal side of said walls, means for producing a first laminar air current within said space above said work surface moving generally horizontally from one wall side to an opposite wall side, and means for producing a second curtain-like laminar current of air, distinct from said first current, passing in a generally vertical direction over said access opening outside said work space.
Claim 3
Dependent Claim
37 words
A work station as claimed in claim 1 wherein said set of walls includes an end-wall opposite said opening, a ceiling wall, and two side walls formed by a diffusion grid and by an offtake grip respectively.
Claim 4
Dependent Claim
48 words
A work station as claimed in claim 2 including a second set of walls generally surrounding said first set and providing a second opening arranged in forwardly spaced communicating relation to said first opening, said second current moving vertically in the space between said first and second openings.
Claim 5
Dependent Claim
18 words
A work station as claimed in claim 2 wherein said diffusion grid is formed by a dust filter.
Claim 6
Dependent Claim
22 words
A work station as claimed in claim 1 wherein separate means are provided for impelling said horizontal flow and said vertical flow.
Claim 7
Dependent Claim
23 words
A work station as claimed in claim 1 wherein separate means are provided for impelling said horizontal and vertical flows at different rates.
Claim 8
Dependent Claim
42 words
A work station as claimed in claim 1 including an enclosed conduit extending outside said space with its opposite ends in communication with said grids to provide a circulatory path for said first air current, and air impelling means in said conduit.
Claim 9
Dependent Claim
73 words
A work station as claimed in claim 1 including an enclosed conduit extending outside said space and terminating at its opposite ends in mutually facing openings disposed adjacent the upper and lower edges of said access opening, the planes of said mutually facing openings projecting forwardly and generally perpendicularly of the plane of said access opening, to provide a circulatory path for said second air current, and air impelling means in said conduit.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |