Patent US4673134A successfully refreshed from Google Patents.
US4673134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agitating mill, particularly agitating ball mill
Assignee: Omya GmbH
•
Filing: 1985-11-08
•
Granted: 1987-06-16
•
Expires: 2005-11-08
Abstract
Abstract An agitating mill, particularly an agitating ball mill, comprising a housing having an inlet for material to be ground and for air, an outlet for fines and air, and at least one horizontal agitator shaft which is provided with agitating members. The outlet for fines and air has a large area and is provided in the top wall of the housing and extends throughout the length and width of the top wall of the housing. A plurality of agitator shafts are preferably provided which are juxtaposed and superposed.
Inventors
- 👤 Ulrich Barthelmess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:05
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/16; B02C2017/165
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
An agitating mill, particularly a ball mill, comprising a housing having at least one inlet for material to be ground and for air and an outlet for fines and air, and at least one horizontal agitator shaft which is provided with agitating members, said at least one inlet being parallel to said at least one horizontal agitator shaft and extending substantially throughout the length of said at least one horizontal agitator shaft, and said outlet for fines and air extending substantially throughout the length and width of a top wall of the housing.
Claim 2
Dependent Claim
93 words
An agitating mill, particularly a ball mill, comprising a housing having at least one inlet for material to be ground and for air and an outlet for fines and air, and at least one horizontal agitator shaft which is provided with agitating members, said at least one inlet being parallel to said at least one horizontal agitator shaft and extending substantially throughout the length of said at least one horizontal agitator shaft, and said outlet for fines and air extending substantially throughout the length and width of a top wall of the housing.
Claim 3
Dependent Claim
23 words
An agitating mill according to claim 1, wherein parallel, spaced apart, inclined rejecting blades are provided in the outlet as a rejecting grid.
Claim 4
Dependent Claim
20 words
An agitating mill according to claim 1, wherein a separator comprising a pneumatic centrifugal separator is disposed over the outlet.
Claim 5
Dependent Claim
37 words
An agitating mill according to claim 1, wherein the agitator shaft is hollow and is provided with at least one air intake opening outside the housing and with at least one air outlet opening inside the housing.
Claim 6
Dependent Claim
23 words
An agitating mill according to claim 4, wherein the agitating members are hollow and are provided with at least one air outlet opening.
Claim 7
Dependent Claim
41 words
An agitating mill according to claim 5, wherein the outlet openings of the agitating members are preceded by a valve comprising a valve seat and a valve ball, said valve ball being disposed between the valve seat and the respective outlet.
Claim 8
Dependent Claim
45 words
An agitating mill according to claim 1, wherein the housing is double-walled at least in part, at least one air inlet is provided in the outer wall and a plurality of inlets leading into the interior of the mill are provided in the inner wall.
Claim 9
Dependent Claim
89 words
An agitating mill, particularly a ball mill, comprising a housing having at least one inlet for material to be ground and for air and an outlet for fines and air, and a plurality of horizontal agitator shafts each of which is provided with agitating members, said agitating shafts being juxtaposed and superposed, the flight circles of the agitating members overlapping and the agitating members being correspondingly axially staggered, and said outlet for fines and air extending substantially throughout the length and width of a top wall of the housing.
Claim 10
Dependent Claim
89 words
An agitating mill, particularly a ball mill, comprising a housing having at least one inlet for material to be ground and for air and an outlet for fines and air, and a plurality of horizontal agitator shafts each of which is provided with agitating members, said agitating shafts being juxtaposed and superposed, the flight circles of the agitating members overlapping and the agitating members being correspondingly axially staggered, and said outlet for fines and air extending substantially throughout the length and width of a top wall of the housing.
Claim 11
Dependent Claim
20 words
Air agitating mill according to claim 8, wherein the agitator shafts are arranged in two rows of three shafts each.
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) | 1990-06-15 | 1990-12-15 | 1991-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-15 | 1994-12-15 | 1995-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-15 | 1998-12-15 | 1999-06-16 | $7700.00 | Window Closed / Lapsed |