Patent US2536787A successfully refreshed from Google Patents.
Patent US3739991A successfully refreshed from Google Patents.
US3739991A
Expired / Lapsed
US
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Vibrating mill
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1971-09-29
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Granted: 1973-06-19
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Expires: 1991-09-29
Abstract
Abstract In a vibrating mill installation having a horizontally extending grinding chamber between a closed material feed device and a closed material discharge device the grinding chamber is provided between its ends with a plurality of serially arranged openings from which portions of gas are withdrawn by pipelines leading to the suction side of a blower or pump, while a cooling agent -such as liquid nitrogen-is introduced into the grinding chamber and cools the material being ground therein. The pressure side of the blower or pump is connected with the material feed device so that the still cool gas withdrawn from the grinding chamber is used to subject the material in the feed device to a preliminary treatment before the material to be ground enters the grinding chamber of the vibrating mill.
Inventors
- 👤 P Wehren
- 👤 H Haas
- 👤 G Demel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:46
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/14; B02C23/00; Y; Y10; Y10S; Y10S241/00; Y10S241/37
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A vibrating mill installation having a closed material feed means and a closed material discharge means and therebetween means for grinding the material introduced into said mill, said means for grinding said material comprising two parallel disposed horizontal grinding tubes each of which is provided with at least one opening used for the withdrawal of gas from the interior of said grinding tubes, means forming a source of reduced pressure, and pipelines connecting said openings with said source of reduced pressure.
Claim 2
Dependent Claim
81 words
A vibrating mill installation having a closed material feed means and a closed material discharge means and therebetween means for grinding the material introduced into said mill, said means for grinding said material comprising two parallel disposed horizontal grinding tubes each of which is provided with at least one opening used for the withdrawal of gas from the interior of said grinding tubes, means forming a source of reduced pressure, and pipelines connecting said openings with said source of reduced pressure.
Claim 3
Dependent Claim
31 words
A vibrating mill installation according to claim 1, including an adjustable throttling device in each pipeline connecting a gas withdrawal opening in said grinding tubes with said source of reduced pressure.
Claim 4
Dependent Claim
30 words
A vibrating mill installation according to claim 1, including a pipeline connecting the pressure side of said means forming a source of reduced pressure with said closed material feed means,
Claim 5
Dependent Claim
45 words
A vibrating mill installation according to claim 1, including a pipeline connecting the pressure side of said means forming a source of reduced pressure with said closed material feed means, and an adjustable throttling device in said pipeline leading to said closed material feed means.
Claim 6
Dependent Claim
35 words
A vibrating mill installation according to claim 1, including a material lock which is impermeable to gas arranged between the material feed device and the inlet of the first one of said two grinding tubes.
Claim 7
Dependent Claim
43 words
A vibrating mill installation according to claim 1, including a material lock which is impermeable to gas arranged between the material feed device and the inlet of the first one of said two grinding tubes, said material lock comprising a bucket wheel lock.
Claim 8
Dependent Claim
39 words
A vibrating mill according to claim 1, including a collecting means connected with said material discharge means and a material lock which is impermeable to gas arranged in the connection between said material discharge means and said collecting means.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |