Patent US4388183A successfully refreshed from Google Patents.
US4388183A
Expired / Lapsed
US
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Swirling air centrifugal scatter classifier
Assignee: CHRISTIAN PFEIFFER AGERMAN FIRM
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Filing: 1981-09-21
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Granted: 1983-06-14
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Expires: 2001-09-21
Abstract
Abstract A classifier using a swirling air current has two or more scatter plates turning about a common axis at different speeds and designed for causing outward motion of feed towards baffle rings placed round and turning with the scatter plates.
Inventors
- 👤 Franz Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:23
CPC Classifications
B; B07; B07B; B07B4/00; B07B4/02; B07B4/025; B07B7/00; B07B7/08; B07B7/083; B07B7/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
In a scatter classifier having a housing, a system for producing a swirling gas current in said housing, an upper first scatter plate, a lower second scatter plate under said upper plate, a system for turning said plates about a common upright axis at different speeds, said lower second plate having a greater diameter than said upper first plate, a middle feed inlet duct over said upper first plate, a system without said housing for producing a classifying gas current within said housing, said upper first plate having a first baffle ring thereon and designed to be turned therewith for guiding said feed, as moved by said plate, with a baffle function, the improvement residing in that said lower second plate has a second baffle ring thereon designed to be turned therewith.
Claim 2
Dependent Claim
132 words
In a scatter classifier having a housing, a system for producing a swirling gas current in said housing, an upper first scatter plate, a lower second scatter plate under said upper plate, a system for turning said plates about a common upright axis at different speeds, said lower second plate having a greater diameter than said upper first plate, a middle feed inlet duct over said upper first plate, a system without said housing for producing a classifying gas current within said housing, said upper first plate having a first baffle ring thereon and designed to be turned therewith for guiding said feed, as moved by said plate, with a baffle function, the improvement residing in that said lower second plate has a second baffle ring thereon designed to be turned therewith.
Claim 3
Dependent Claim
28 words
The classifier as claimed in claim 1, having a third, still lower, scatter plate and a third baffle ring fixed to said third scatter plate for turning therewith.
Claim 4
Dependent Claim
68 words
The classifier as claimed in claim 2 wherein the first baffle ring has an inner structure fixed thereto in the form of at least one stirrer; the second baffle ring has an inner structure fixed thereto in the form of at least one blade; and the third baffle ring has an inner structure fixed thereto in the form of a round skirt capable of adjustment by axial movement.
Claim 5
Dependent Claim
40 words
The classifier as claimed in claim 1 having a structure fixed to the first and uppermost baffle ring and designed for speeding up solid feed to be classified, said structure being designed to be turned with said first baffle ring.
Claim 6
Dependent Claim
52 words
The classifier as claimed in any one of claims 1 or 2, having a ring-like take-up pocket for small-size grains of feed from the swirling air, such grains being put in motion by parts on said topmost baffle ring at a position past and outside a top limit of the classifying space.
Claim 7
Dependent Claim
27 words
The classifier as claimed in claim 1 wherein at least one baffle ring has an inner structure fixed thereto in the form of at least one stirrer.
Claim 8
Dependent Claim
27 words
The classifier as claimed in claim 1 wherein at least one baffle ring has an inner structure fixed thereto in the form of at least one blade.
Claim 9
Dependent Claim
21 words
The classifier as claimed in claim 7 wherein the at least one blade is fixed to the lower second baffle ring.
Claim 10
Dependent Claim
29 words
The classifier as claimed in claim 1 or 2 wherein at least one baffle ring has an inner structure fixed thereto in the form of at least one rod.
Claim 11
Dependent Claim
29 words
The classifier as claimed in claim 1 or 2 wherein at least one baffle ring has an inner structure fixed thereto in the form of at least one grid.
Claim 12
Dependent Claim
30 words
The classifier as claimed in claim 1 or 2 wherein at least one baffle ring has an inner structure fixed thereto in the form of at least one round plate.
Claim 13
Dependent Claim
21 words
The classifier as claimed in claim 6 wherein the at least one stirrer is fixed to the upper first baffle ring.
Claim 14
Dependent Claim
26 words
The classifier as claimed in claim 2 wherein at least one baffle ring has an inner structure fixed thereto in the form of a round skirt.
Claim 15
Dependent Claim
33 words
The classifier as claimed in claim 2 wherein the third still lower baffle ring has an inner structure fixed thereto in the form of a round skirt capable of adjustment by axial movement.
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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |