US3777457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning the exhaust air from workshops
Assignee: Rio Tinto Switzerland AG
•
Filing: 1972-01-17
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Granted: 1973-12-11
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Expires: 1992-01-17
Abstract
Abstract An apparatus for cleaning the exhaust air from workshops, said apparatus comprising a cyclone and a filter attached to the delivery end of the cyclone, whereby within the cyclone and before a rotary movement of the exhaust air, dusty and/or gaseous constituents of the air are combined with droplets of liquid to increase the action of rotary movement for removal of these constituent from the air and further delivering the air cleaned by rotary action through a wet operated filter removing all remaining constituents from the air.
Inventors
- 👤 M Laube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:13
CPC Classifications
B; B01; B01D; B01D50/00; B01D47/00; B01D47/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
111 words
A cleaner for exhaust air from a workshop, comprising: a housing having an air entry at its bottom, a lower enclosing wall impermeable to air, and an upper enclosing wall permeable to air; a ring of stator blades downstream of the air entry, arranged to direct the air flow through outlet openings of the ring and in so doing to impart rotation to the air flow; a fan upstream of the ring of stator blades; means for supplying water to wet the upper enclosing wall; means for supplying water to the outlet openings of the ring; and means for collecting dirt which has become separated from the air in the housing.
Claim 2
Dependent Claim
111 words
A cleaner for exhaust air from a workshop, comprising: a housing having an air entry at its bottom, a lower enclosing wall impermeable to air, and an upper enclosing wall permeable to air; a ring of stator blades downstream of the air entry, arranged to direct the air flow through outlet openings of the ring and in so doing to impart rotation to the air flow; a fan upstream of the ring of stator blades; means for supplying water to wet the upper enclosing wall; means for supplying water to the outlet openings of the ring; and means for collecting dirt which has become separated from the air in the housing.
Claim 3
Dependent Claim
52 words
Device according to claim 1, characterised in that the fan is an axial fan and is arranged inside suction pipe opening into the exhaust air entry, and between the axial fan and the ring of stator blades there is provided a water distributing ring for injecting water into the exhaust air stream.
Claim 4
Dependent Claim
17 words
Device according to claim 1, characterised in that the air-permeable housing part is formed as a filter.
Claim 5
Dependent Claim
32 words
Device according to claim 3, characterised in that the filter, formed octagonal in cross section, consists of two filter baskets arranged axially after one another, and holding in between a filter packing.
Claim 6
Dependent Claim
25 words
Device according to claim 4, characterised in that the filter baskets constitute a contracting truncated cone in the direction of flow of the exhaust air.
Claim 7
Dependent Claim
32 words
Device according to claim 3, characterised in that the water supply is arranged above the filter and is formed as a reservoir delivering into the filter with a saw-tooth shaped perforated floor.
Claim 8
Dependent Claim
20 words
Device according to claim 6, characterised in that, nozzles are provided spraying the upstream surface of the inner filter basket.
Claim 9
Dependent Claim
45 words
Device according to claim 1, characterised in that the water supply to the ring of stator blades consists of an open or closed gutter with outlet openings arranged above exit openings whereby said gutter is provided along the circumference of the ring of stator blades.
Claim 10
Dependent Claim
46 words
Device according to claim 8, characterised in that the ring of stator blades carries a guide cone extending in the direction of flow of exhaust air, which is wettable by means of a water supply pipe for directing water in the direction towards the outlet openings.
Claim 11
Dependent Claim
16 words
Device according to claim 9, characterised in that open channels are provided on the guide cone.
Claim 12
Dependent Claim
27 words
Device according to claim 9, characterised in that along the guide cone, starting from the apex of the guide cone, a spirally extending open channel is provided.
Claim 13
Dependent Claim
30 words
Device according to claim 8, characterised in that the ring of stator blades is axially enclosed at a distance by a pipe for bringing water into the exhaust air stream.
Claim 14
Dependent Claim
27 words
Device according to claim 12, characterised in that upstream of the axial fan, in the direction of flow of exhaust air, a water distributing ring is provided.
References Cited (Backward Citations)
US3526082A
Cited
US3563004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |