EP0146852B1
Expired / Lapsed
EP
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Agitator mill
Assignee: Erich Netzsch GmbH and Co Holding KG
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Filing: 1984-12-07
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Granted: 1987-03-04
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Expires: 2004-12-07
Abstract
No abstract record available.
Inventors
- 👤 Giacomo Dr. Canepa
- 👤 Klaus Ott
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 02:28
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/16; B02C17/161
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
An agitator mill comprising a milling body (12) which includes a grinding chamber (18) to be filled at least partly with grinding media (50) and material (52) to be ground and has an inlet (28) for material to be ground and an outlet (30) for processed material, an agitator shaft (22) having an inner shaft end inside the grinding chamber (18), and a separating means (42) permitting finished processed material (52) to flow out of the grinding chamber (18) to the outlet (30) for processed material, yet retaining grinding media (50), wherein the agitator shaft (22) has an end portion (38) formed with a cavity (40) which is open at the inner shaft end, and the end portion (38) of the agitator shaft (22) includes recesses (46) which are distributed around the cavity (40) and spaced from the inner shaft end and permit grinding media (50) which entered the cavity (40) through the inner shaft end to flow back into the grinding chamber (18) characterized in that the separating means (42) is arranged at least substantially inside the cavity (40).
Claim 2
Dependent Claim
180 words
An agitator mill comprising a milling body (12) which includes a grinding chamber (18) to be filled at least partly with grinding media (50) and material (52) to be ground and has an inlet (28) for material to be ground and an outlet (30) for processed material, an agitator shaft (22) having an inner shaft end inside the grinding chamber (18), and a separating means (42) permitting finished processed material (52) to flow out of the grinding chamber (18) to the outlet (30) for processed material, yet retaining grinding media (50), wherein the agitator shaft (22) has an end portion (38) formed with a cavity (40) which is open at the inner shaft end, and the end portion (38) of the agitator shaft (22) includes recesses (46) which are distributed around the cavity (40) and spaced from the inner shaft end and permit grinding media (50) which entered the cavity (40) through the inner shaft end to flow back into the grinding chamber (18) characterized in that the separating means (42) is arranged at least substantially inside the cavity (40).
Claim 3
Dependent Claim
51 words
The agitator mill as claimed in claim 1, characterized in that at least one conveying member (66) is formed at the agitator shaft (22) to promote axial flow of grinding media (50) and material (52) to be ground from the inner shaft end through the cavity (40) to the recesses (46).
Claim 4
Dependent Claim
22 words
The agitator mill as claimed in claim 2, characterized in that the cavity (40) diverges frusticonically away from the inner shaft end.
Claim 5
Dependent Claim
30 words
The agitator mill as claimed in one of claims 1 to 3, characterized in that the separating means (42) is arranged at least approximately coaxially with the agitator shaft (22).
Claim 6
Dependent Claim
39 words
The agitator mill as claimed in claim 4, characterized in that the separating means (42) is arranged on a tube (32) which extends through part of the grinding chamber (18) from the inner shaft end into the cavity (40).
Claim 7
Dependent Claim
46 words
The agitator mill as claimed in claim 5, characterized in that the tube (32) is guided so as to be pulled out to the exterior in a tubular socket (68) which extends from an end face (36) of the milling body (12) into the cavity (40).
Claim 8
Dependent Claim
100 words
The agitator mill as claimed in claim 5, characterized in that the tube (32) is guided so as to be pulled out to the exterior in a sleeve (72) which is arranged at an end wall (36) of the milling body (12) and is adjustable between a normal operating position in which it is disposed substantially outside of the grinding chamber (18) and a position for exchange of the separating means (42), at which position the sleeve (72) protrudes into the cavity (40) and affords sealing against the agitator shaft (22) in a manner to retain the grinding media (50).
Claim 9
Dependent Claim
40 words
The agitator mill as claimed in one of claims 1 to 6, characterized in that the separating means (42) communicates through the altogether hollow agitator shaft (22) with the outlet (30) for processed material disposed at an outer shaft end.
Claim 10
Dependent Claim
37 words
The agitator mill as claimed in claim 8, wherein the separating means (42) comprises a screen cartridge, characterized in that the separating means (42) is fixed to the agitator shaft (22) and rotates together with the same.
Claim 11
Dependent Claim
54 words
The agitator mill as claimed in one of claims 1 to 8, characterized in that the separating means (42) comprises per se known separating discs (56, 58) which are disposed coaxially with the agitator shaft (22) and define an annular gap (60) and of which one is rotatable while the other one is stationary.
References Cited (Backward Citations)
No citation records indexed.
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