US3807552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cooling and classifying ground material
Assignee: ThyssenKrupp Industrial Solutions AG
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Filing: 1969-12-24
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Granted: 1974-04-30
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Expires: 1989-12-24
Abstract
Abstract An air separator is provided with an inlet for blowing cooling air into a circulating stream containing separated fines leaving a primary separating chamber and entering a secondary separating chamber. An excess of warm air is extracted through a pipe to maintain the quality of air flowing through the primary chamber constant.
Inventors
- 👤 B Gotthard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:14
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/08; B07B7/083
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
199 words
Apparatus for cooling and classifying ground material, comprising means defining a primary chamber for separating coarse material from an air stream; means defining a secondary chamber for separating fine material from an air stream, which has an inlet connection leading from the upper portion of the primary chamber into the secondary chamber and an outlet connection leading from the secondary chamber into the lower portion of the primary chamber; an inlet for ground material leading into the upper portion of the primary chamber; a fan arranged to recirculate an air stream upward through the primary chamber into contact with the incoming ground material, through the secondary chamber and back into the lower portion of the primary chamber, causing coarse material to separate by gravity in the primary chamber, and causing fine material to be carried by the air stream into the secondary chamber and there separated from the air stream; wherein the improvement comprises means for introducing, into the recirculating air stream entering the secondary chamber, air which is cooler than such entering air stream; and means for withdrawing air from the recirculating air stream leaving the secondary chamber before such air stream again contacts said incoming ground material.
Claim 2
Dependent Claim
199 words
Apparatus for cooling and classifying ground material, comprising means defining a primary chamber for separating coarse material from an air stream; means defining a secondary chamber for separating fine material from an air stream, which has an inlet connection leading from the upper portion of the primary chamber into the secondary chamber and an outlet connection leading from the secondary chamber into the lower portion of the primary chamber; an inlet for ground material leading into the upper portion of the primary chamber; a fan arranged to recirculate an air stream upward through the primary chamber into contact with the incoming ground material, through the secondary chamber and back into the lower portion of the primary chamber, causing coarse material to separate by gravity in the primary chamber, and causing fine material to be carried by the air stream into the secondary chamber and there separated from the air stream; wherein the improvement comprises means for introducing, into the recirculating air stream entering the secondary chamber, air which is cooler than such entering air stream; and means for withdrawing air from the recirculating air stream leaving the secondary chamber before such air stream again contacts said incoming ground material.
Claim 3
Dependent Claim
31 words
Apparatus according to claim 1 wherein the means for withdrawing air is arranged to withdraw air from the air stream leaving the secondary chamber before such air stream enters the fan.
Claim 4
Dependent Claim
200 words
Apparatus for cooling and classifying ground material, comprising means defining a primary separating chamber, means defining a secondary separating chamber, an inlet connection leading from the upper portion of the primary chamber into the secondary chamber and an outlet connection leading from the secondary chamber into the lower portion of the primary chamber, an inlet for said ground material leading into the upper portion of the primary chamber, a fan constructed and arranged to circulate an air stream upwardly through the primary chamber into contact with the incoming ground material, through the secondAry chamber and back into the lower portion of the primary chamber, causing coarse material to separate by gravity in the primary chamber, and causing fine material to be carried by the air stream into the secondary chamber and there separated from the air stream, wherein the improvement comprises means for introducing cooling air into the circulating air stream leaving the primary chamber and entering the secondary chamber, and means for withdrawing an excess of air from said circulating air stream leaving the secondary chamber before such air stream again contacts said incoming ground material to maintain a substantially constant quantity of air flowing through said primary chamber.
Claim 5
Dependent Claim
200 words
Apparatus for cooling and classifying ground material, comprising means defining a primary separating chamber, means defining a secondary separating chamber, an inlet connection leading from the upper portion of the primary chamber into the secondary chamber and an outlet connection leading from the secondary chamber into the lower portion of the primary chamber, an inlet for said ground material leading into the upper portion of the primary chamber, a fan constructed and arranged to circulate an air stream upwardly through the primary chamber into contact with the incoming ground material, through the secondAry chamber and back into the lower portion of the primary chamber, causing coarse material to separate by gravity in the primary chamber, and causing fine material to be carried by the air stream into the secondary chamber and there separated from the air stream, wherein the improvement comprises means for introducing cooling air into the circulating air stream leaving the primary chamber and entering the secondary chamber, and means for withdrawing an excess of air from said circulating air stream leaving the secondary chamber before such air stream again contacts said incoming ground material to maintain a substantially constant quantity of air flowing through said primary chamber.
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |