US4260478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for classifying particles
Assignee: Hosokawa Funtai Kogaku Kenkyusho KK
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Filing: 1979-11-28
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Granted: 1981-04-07
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Expires: 1999-11-28
Abstract
Abstract An apparatus for classifying particles comprising a main body having a fine particle outlet and a coarse particle outlet, a classifying fan wheel disposed within the main body, and a first gas inlet channel for supplying the particles to the interior of the main body along with a gas stream. The apparatus further includes a gas passing member having a large number of gas inlets opened toward the direction of rotation of the fan wheel, and a second gas inlet channel for supplying a gas stream to the space between the gas passing member and the inner wall surface of the main body.
Inventors
- 👤 Masuo Hosokawa
- 👤 Tohei Yokoyama
- 👤 Katsuya Mizui
- 👤 Haruhisa Yamashita
- 👤 Kouichi Doi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:48
CPC Classifications
B; B07; B07B; B07B4/00; B07B4/02; B07B11/00; B07B11/04; B07B7/00; B07B7/08; B07B7/083; B07B9/00; B07B9/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
189 words
An apparatus for classifying particles comprising, a main body (1) having a fine particle outlet (5) and a coarse particle outlet (6), a classifying fan wheel (2) rotatably disposed within the main body (1) and having an inside space in communication with the fine particle outlet (5), and a first gas inlet channel (4) communicating with the interior of the main body (1) for supplying the particles to be classified to the fan wheel (2) externally thereof along with a gas stream, the apparatus being characterized in that a gas passing member (7) is disposed within the main body (1) to surround the classifying fan wheel (2) at a suitable spacing and has a large number of gas inlets (15) opened toward the direction of rotation of the fan wheel (2), and the first gas inlet channel (4) is in communication with the interior of a classifying chamber (17) provided inside the gas passing member (7), a second gas inlet channel (9) communicating with the interior of a gas chamber (8) formed between the gas passing member (7) and the inner wall surface (14) of the main body (1).
Claim 2
Independent Claim
189 words
An apparatus for classifying particles comprising, a main body (1) having a fine particle outlet (5) and a coarse particle outlet (6), a classifying fan wheel (2) rotatably disposed within the main body (1) and having an inside space in communication with the fine particle outlet (5), and a first gas inlet channel (4) communicating with the interior of the main body (1) for supplying the particles to be classified to the fan wheel (2) externally thereof along with a gas stream, the apparatus being characterized in that a gas passing member (7) is disposed within the main body (1) to surround the classifying fan wheel (2) at a suitable spacing and has a large number of gas inlets (15) opened toward the direction of rotation of the fan wheel (2), and the first gas inlet channel (4) is in communication with the interior of a classifying chamber (17) provided inside the gas passing member (7), a second gas inlet channel (9) communicating with the interior of a gas chamber (8) formed between the gas passing member (7) and the inner wall surface (14) of the main body (1).
Claim 3
Dependent Claim
26 words
An apparatus as defined in claim 1 characterized in that the third gas inlet channel (10) is disposed below the classifying chamber (17) in communication therewith.
Claim 4
Dependent Claim
29 words
An apparatus as defined in claim 2 characterized in that a pneumatically screening ring (13) is disposed below the gas passing member (7) substantially continuously with the member (7).
Claim 5
Dependent Claim
32 words
An apparatus as defined in claim 3 characterized in that the first gas inlet channel (4) has an opening (12) positioned close to a lower portion of the pneumatically screening ring (13).
Claim 6
Dependent Claim
46 words
An apparatus as defined in claim 3 characterized in that the first gas inlet channel (4) is in communication with the classifying chamber (17) at one side of the fan wheel (2) to supply the particles in the direction of rotation of the fan wheel (2).
Claim 7
Independent Claim
53 words
An apparatus as defined in any one of claims 2 to 5 characterized in that there is provided control means (31) for varying the gas flow ratio between the second gas inlet channel (9) and the third gas inlet channel (10) while maintaining the combined gas flow therethrough at an approximately constant value.
Claim 8
Dependent Claim
47 words
An apparatus as defined in claim 6 characterized in that the first gas inlet channel (4) is provided with particle supply adjusting means (29) for maintaining the weight of the particles through the inlet channel (4) at an approximately constant value per unit amount of the gas.
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) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |