US3567141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mill for grinding hard materials
Assignee: INSTYTUT CHEMICZNEJ PREZEROBKI
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Filing: 1968-07-22
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Granted: 1971-03-02
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Expires: 1988-07-22
Abstract
Abstract A mill for grinding material in which a rotating element throws the material against a hard lining element, the material being circulated over a separating screen spaced from the lining element and thence back to the rotating element.
Inventors
- 👤 Olbracht Sylveste Zbraniborski
- 👤 Henryk Zielinski
- 👤 Helmut Kilian Skiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:54
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/14; B02C13/18; B02C13/1807; B02C13/1835; B23; B23K; B23K9/00; B23K9/12; B23K9/124; B23K9/125
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A mill for grinding hard material comprising: a housing, lining means in said housing for disintegrating material thrown thereagainst; rotating means in said housing having passage means therethrough for discharging material against said lining means; means for establishing a closed circulation path for material comprising a conical element beneath said lining means having screen means at the upper part thereof and having an imperforate bottom, and duct means for fluid connecting the interior of said housing and said rotating means, said duct means extending from adjacent said imperforate bottom centrally within said housing; means for introducing material into said housing; and means for collecting material passed through said screen means.
Claim 2
Dependent Claim
110 words
A mill for grinding hard material comprising: a housing, lining means in said housing for disintegrating material thrown thereagainst; rotating means in said housing having passage means therethrough for discharging material against said lining means; means for establishing a closed circulation path for material comprising a conical element beneath said lining means having screen means at the upper part thereof and having an imperforate bottom, and duct means for fluid connecting the interior of said housing and said rotating means, said duct means extending from adjacent said imperforate bottom centrally within said housing; means for introducing material into said housing; and means for collecting material passed through said screen means.
Claim 3
Dependent Claim
44 words
The mill of claim 1, said means for introducing material comprising feed means for discharging material into the path of said rotating means, said rotating means comprising hollow arms, whereby material fed into said housing is impelled by said arms against said lining means.
Claim 4
Dependent Claim
20 words
The mill of claim 1, said means for introducing material comprising feed means for discharging material bEneath said rotating means.
Claim 5
Dependent Claim
18 words
The mill of claim 1, said means for collecting material comprising a conical housing beneath said conical element.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |