US3715972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clean work station
Assignee: Donaldson Co Inc
•
Filing: 1971-05-28
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Granted: 1973-02-13
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Expires: 1991-05-28
Abstract
Abstract A laminar flow clean work station adapted for rapid change in work setup by utilizing a common exhaust plenum and drain and interchangeable work modules. Each module empties separately into the common exhaust plenum and drain. Each module has a separate exhaust damper which is adjustable to suit the particular exhaust requirement of the work to be undertaken at the module. Air is exhausted through the series of apertures formed in each module below a work receiving opening the station work surface. The opening forms a lip overhanging the module work receiving space and has a depending flange to further baffle the apertures from the station work surface.
Inventors
- 👤 F Kelso
- 👤 A Gustin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:04
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/02; B08; B08B; B08B15/00; B08B15/02; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
18 words
In a clean work station, the combination of: a work station frame; at least one work module having
Claim 2
Dependent Claim
18 words
In a clean work station, the combination of: a work station frame; at least one work module having
Claim 3
Dependent Claim
5 words
a generally flat upper surface;
Claim 4
Dependent Claim
5 words
a generally flat upper surface;
Claim 5
Dependent Claim
152 words
In a clean work station, the combination of: a work station frame; at least one work module having 1. a generally flat upper surface; 2. a hollow interior; 3. a module exhaust plenum communicating with the hollow interior; 4. an adjustable damper control for said module exhaust plenum; and 5. means forming a work receiving opening in the upper surface; a common exhaust plenum attached to the frame; means connecting each module exhaust plenum to the common exhaust plenum, whereby the module damper control controls the flow of air from the hollow interior of the work module to the common exhaust plenum; wall means formed within said module and below and recessed from the periphery of the work receiving opening so that the opening forms an overhanging lip about said wall means; and a plurality of apertures formed in said wall means and disposed in horizontal alignment immediately below said overhanging lip.
Claim 6
Dependent Claim
152 words
In a clean work station, the combination of: a work station frame; at least one work module having 1. a generally flat upper surface; 2. a hollow interior; 3. a module exhaust plenum communicating with the hollow interior; 4. an adjustable damper control for said module exhaust plenum; and 5. means forming a work receiving opening in the upper surface; a common exhaust plenum attached to the frame; means connecting each module exhaust plenum to the common exhaust plenum, whereby the module damper control controls the flow of air from the hollow interior of the work module to the common exhaust plenum; wall means formed within said module and below and recessed from the periphery of the work receiving opening so that the opening forms an overhanging lip about said wall means; and a plurality of apertures formed in said wall means and disposed in horizontal alignment immediately below said overhanging lip.
Claim 7
Dependent Claim
3 words
a hollow interior;
Claim 8
Dependent Claim
3 words
a hollow interior;
Claim 9
Dependent Claim
32 words
The combination of claim 1, and including a master damper control and means connecting said master damper control to the common exhaust plenum for controlling vacuum applied to the common exhaust plenum.
Claim 10
Dependent Claim
25 words
The combination of claim 1 and in which the overhanging lip has a depending flange attached thereto, said flange terminating short of the aperture alignment.
Claim 11
Dependent Claim
9 words
a module exhaust plenum communicating with the hollow interior;
Claim 12
Dependent Claim
9 words
a module exhaust plenum communicating with the hollow interior;
Claim 13
Dependent Claim
10 words
an adjustable damper control for said module exhaust plenum; and
Claim 14
Dependent Claim
10 words
an adjustable damper control for said module exhaust plenum; and
Claim 15
Dependent Claim
27 words
The combination of claim 1, and in which the apertures are aligned approximately 0.75 inches below the upper surface of the module at the work receiving opening.
Claim 16
Dependent Claim
21 words
The combination of claim 1, and in which the overhanging lip overhangs the wall forming means by at least 0.75 inches.
Claim 17
Dependent Claim
102 words
means forming a work receiving opening in the upper surface; a common exhaust plenum attached to the frame; means connecting each module exhaust plenum to the common exhaust plenum, whereby the module damper control controls the flow of air from the hollow interior of the work module to the common exhaust plenum; wall means formed within said module and below and recessed from the periphery of the work receiving opening so that the opening forms an overhanging lip about said wall means; and a plurality of apertures formed in said wall means and disposed in horizontal alignment immediately below said overhanging lip.
Claim 18
Dependent Claim
102 words
means forming a work receiving opening in the upper surface; a common exhaust plenum attached to the frame; means connecting each module exhaust plenum to the common exhaust plenum, whereby the module damper control controls the flow of air from the hollow interior of the work module to the common exhaust plenum; wall means formed within said module and below and recessed from the periphery of the work receiving opening so that the opening forms an overhanging lip about said wall means; and a plurality of apertures formed in said wall means and disposed in horizontal alignment immediately below said overhanging lip.
Claim 19
Dependent Claim
44 words
The combination of claim 3, and in which the overhanging lip overhangs the wall forming means by approximately 1 inch, the apertures are aligned approximately 0.75 inches below the module upper surface, and the depending flange terminates approximately 0.25 inches above the aperture alignment.
Claim 20
Dependent Claim
21 words
The combination of claim 4, and in which the overhanging lip overhangs the wall forming means by at least 0.75 inches.
Claim 21
Dependent Claim
32 words
The combination of claim 6, and including a master damper control and means connecting said master damper control to the common exhaust plenum for controlling vacuum applied to the common exhaust plenum.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |