US4273295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agitator mill
Assignee: Erich Netzsch GmbH and Co Holding KG
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Filing: 1979-04-04
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Granted: 1981-06-16
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Expires: 1999-04-04
Abstract
Abstract An agitator mill for the continuous processing of flowable grinding stock with a bearing housing arranged on a stand, a drive shaft which turns in at least one bearing of the bearing housing with a detachable grinding chamber attached to the bearing housing which is equipped with a grinding stock intake and contains grinding stock as well as grinding bodies and also having a detachable agitator shaft coupled to the bearing housing and reaching into the grinding chamber where it carries at least one agitating element, a discharge chamber situated between the grinding chamber and at least one bearing and a separation system arranged between the grinding chamber and the discharge chamber which is equipped with a separator ring rotating about the agitator shaft and a stationary ring attached to the bearing housing. Between the two is a separation slit which will permit the processed grinding stock to flow through but will retain the grinding bodies.
Inventors
- 👤 Josef Pollmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:10
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
237 words
An agitator mill for the continuous processing of grinding stock comprising a stand, a bearing housing arranged on said stand and having at least one bearing, a drive shaft which turns in said at least one bearing of said bearing housing, a detachable grinding chamber attached to said bearing housing having a grinding stock intake and containing grinding stock as well as grinding bodies, a detachable agitator shaft coupled to said bearing housing and reaching into said grinding chamber where it includes at least one agitating element carried on said shaft, a discharge chamber situated between said grinding chamber and said at least one bearing, and a separation system arranged between said grinding chamber and said discharge chamber including a separator ring rotating together with said agitator shaft, a stationary ring attached to said bearing housing, a separation slit between the two said rings to permit the processed grinding stock to flow through but to retain the grinding bodies, characterized by the fact that said rotating separator ring (56) is attached to said drive shaft (32) independently of said agitator shaft (70) which is also attached to said drive shaft (32) and that said agitator shaft (70) in the region between said grinding chamber (20) and said at least one bearing (36) situated in said bearing housing (14) is detachable from said drive shaft (32) while said separator ring (56) remains attached to said drive shaft (32).
Claim 2
Dependent Claim
237 words
An agitator mill for the continuous processing of grinding stock comprising a stand, a bearing housing arranged on said stand and having at least one bearing, a drive shaft which turns in said at least one bearing of said bearing housing, a detachable grinding chamber attached to said bearing housing having a grinding stock intake and containing grinding stock as well as grinding bodies, a detachable agitator shaft coupled to said bearing housing and reaching into said grinding chamber where it includes at least one agitating element carried on said shaft, a discharge chamber situated between said grinding chamber and said at least one bearing, and a separation system arranged between said grinding chamber and said discharge chamber including a separator ring rotating together with said agitator shaft, a stationary ring attached to said bearing housing, a separation slit between the two said rings to permit the processed grinding stock to flow through but to retain the grinding bodies, characterized by the fact that said rotating separator ring (56) is attached to said drive shaft (32) independently of said agitator shaft (70) which is also attached to said drive shaft (32) and that said agitator shaft (70) in the region between said grinding chamber (20) and said at least one bearing (36) situated in said bearing housing (14) is detachable from said drive shaft (32) while said separator ring (56) remains attached to said drive shaft (32).
Claim 3
Dependent Claim
58 words
The agitator mill according to claim 1 wherein said drive shaft is supported in said bearing housing by more than one bearing, characterized by the fact that said agitator shaft (70) can be detached from said drive shaft (32) in the region between said bearing (36) situated closest to said separator system (66) and said grinding chamber (20).
Claim 4
Dependent Claim
62 words
The agitator mill according to claim 1 wherein said discharge chamber is separated from said at least one bearing situated in said bearing housing by a shaft packing sealing said drive shaft from said bearing housing characterized by the fact that said agitator shaft (70) is detachable from said drive shaft (32) between said shaft packing (38) and said grinding chamber (20).
Claim 5
Dependent Claim
40 words
The agitator mill according to claim 1 further characterized by the fact that said agitator shaft (70) is centered at said rotating separator ring (56) and connected through it with said drive shaft (32) for the purpose of joint rotation.
Claim 6
Dependent Claim
43 words
The agitator mill according to claim 4 further characterized by the fact that said agitator shaft (70) has a front plate (74) which is shaped at least approximately matching with said rotating separator ring (56) and connected with it by paraxial bolts (76).
Claim 7
Dependent Claim
58 words
The agitator mill according to claim 5 further characterized by the fact that said paraxial bolts (76) which are attached to said front plate (74) are thread bolts which extend through holes in said rotating separator ring (56) and are fastened with nuts (78) which are accessible from the outside of the mill through said discharge chamber (68).
Claim 8
Dependent Claim
56 words
The agitator mill according to claim 5 wherein said drive shaft is tubular along its total length and further characterized by a tie rod (98) which is braced against that end of said drive shaft (32) which is facing away from said grinding chamber (20), said agitator shaft (70) being screwed detachably to said tie rod.
Claim 9
Dependent Claim
35 words
The agitator mill according to claim 7 further characterized by the fact that said tie rod (98) is tubular and made a part of a coolant cycle for the cooling of said agitator shaft (70).
Claim 10
Dependent Claim
41 words
The agitator mill according to claim 1, further characterized by said drive shaft being tubular along its total length, a coolant pipe (92) situated coaxially in said drive shaft (32), said agitator shaft (70) connected detachably to said coolant pipe (92).
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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |