US3765155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the suction and purification of polluted air
Assignee: Charbonnages de France CDF
•
Filing: 1970-04-06
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Granted: 1973-10-16
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Expires: 1990-04-06
Abstract
Abstract Apparatus for purification of polluted air comprising a radial fan, constituted by a thick filtering element made of permeable material and an impermeable supporting plate fixed together for rotation and rotating at a high and preferably constant speed in the interior of a closed sampling chamber provided with a suction orifice located on the filter side and with evacuation orifices situated on the supporting plate side, the sections of the suction orifice, the evacuation orifices and the sampling chamber having values such that the suction flow is less than the actual flow-rate of the radial fan.
Inventors
- 👤 P Courbon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:42
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/26; F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/167; G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2202; G01N1/2205; G01N1/2211; G01N1/24; G01N2001/222; G01N2001/2223
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
161 words
A device for removing at least a sample of particles in suspension in polluted atmosphere comprising a radial fan rotor including a supporting plate having a cylindrical edge and mounted for rotation, and a thick filter of permeable material mounted to be retained by and rotate with said supporting plate, means for rotation of said radial fan rotor connected to said rotor, and means for recirculation of the atmosphere through said filter including said rotor to move the flow through said filter and a static sampling chamber having walls fully enclosing said radial fan rotor, and means to restrict the flow of the atmosphere into and out of said chamber to a lower rate of flow than the delivery flow from said radial fan rotor in said sampling chamber including a suction orifice through a said chamber wall adjacent the center of said filter located therein and evacuation orifices through a said chamber wall adjacent the periphery of said supporting plate.
Claim 2
Independent Claim
161 words
A device for removing at least a sample of particles in suspension in polluted atmosphere comprising a radial fan rotor including a supporting plate having a cylindrical edge and mounted for rotation, and a thick filter of permeable material mounted to be retained by and rotate with said supporting plate, means for rotation of said radial fan rotor connected to said rotor, and means for recirculation of the atmosphere through said filter including said rotor to move the flow through said filter and a static sampling chamber having walls fully enclosing said radial fan rotor, and means to restrict the flow of the atmosphere into and out of said chamber to a lower rate of flow than the delivery flow from said radial fan rotor in said sampling chamber including a suction orifice through a said chamber wall adjacent the center of said filter located therein and evacuation orifices through a said chamber wall adjacent the periphery of said supporting plate.
Claim 3
Dependent Claim
24 words
A device as claimed in claim 1 further characterized by a cylindrical recess hollowed out of the center zone of said radial fan rotor.
Claim 4
Dependent Claim
24 words
A device as claimed in claim 2 further characterized by said suction orifice being provided with a conduit which passes into said cylindrical recess.
Claim 5
Dependent Claim
43 words
A device as claimed in claim 2 further characterized by an additional filtering disc made of a filtering material of higher permeability than said first mentioned filter and having a thickness less than that of said fiRst-mentioned filter being provided inside said recess.
Claim 6
Dependent Claim
31 words
A device as claimed in claim 1 further characterized by the free upper face of said radial fan rotor being covered near the periphery thereof by a washer of impermeable material.
Claim 7
Dependent Claim
29 words
A device as claimed in claim 1, in which said suction orifice is provided with a conduit delivering in the vicinity of the free upper face of said rotor.
Claim 8
Dependent Claim
20 words
A device in accordance with claim 1, in which said filter is made of a plastic foam with open pores.
Claim 9
Dependent Claim
40 words
A device as claimed in claim 1, further comprising a second chamber and wherein said suction orifice provides communication between said closed sampling chamber and said second chamber, said second chamber being provided with a plurality of peripheral suction orifices.
Claim 10
Dependent Claim
36 words
A device as claimed in claim 8, in which the axes of said peripheral suction orifices and the axes of said evacuation orifices are directed tangentially with respect to a lateral wall of said sampling chamber.
Claim 11
Dependent Claim
27 words
A device as claimed in claim 1, in which at least the wall of said sampling chamber pierced with said suction orifice is made of transparent material.
Claim 12
Dependent Claim
35 words
A device as claimed in claim 10 in which an element impregnated with colored reagents is fixed on the internal face of the wall of said sampling chamber which is pierced with said suction orifice.
Claim 13
Dependent Claim
29 words
A device as claimed in claim 1, in which said filter is impregnated with a purifying substance permitting the elimination of certain noxious or bad smelling gases or vapors.
Claim 14
Dependent Claim
84 words
A device as claimed in claim 1, further characterized by said supporting plate with said cylindrical edge opening in a downward direction, said peripheral evacuation orifices arranged tangentially with respect to a said chamber wall in the direction of rotation of said rotor, a cyclone-separator comprising at least one tangential inlet and fixed in an air-tight and removable manner underneath a lower wall of said sampling chamber, and a transfer tube directed upward from said cyclone-separator through said suction orifice of said sampling chamber.
Claim 15
Dependent Claim
35 words
A device as claimed in claim 13, characterized by the fact that the cylindrical edge of said plate is provided with an inturned annular portion engaging with pressure on the periphery of said thick filter.
Claim 16
Dependent Claim
32 words
A device as claimed in claim 13 characterized by the fact that the diameter of the cylindrical edge of said plate is slightly smaller than the normal diameter of the thick filter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |