Patent EP0238144A2 successfully refreshed from Google Patents.
EP0129384A2
Expired / Lapsed
EP
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Sandmill rotor discs
Assignee: Morehouse Industries Inc
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Filing: 1984-06-11
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Granted: —
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Expires: 2004-06-11
Abstract
Abstract A rotor disc (18) for a sand mill is formed with a rim (38) which is considerably thicker in the axial direction than the web (36) extending between the rim and the hub of the disc. This improves the milling operation and extends the life of the disc. Forming the rim and hub of an abrasively tough, high molecular weight material, such as polyethylene instead of steel, further extends the life of the rotor disc by reducing wear and also reducing contamination of the product being processed. Ceramic materials also provide excellent wearability.
Inventors
- 👤 Edward J. Szkaradek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 22:43
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/16; B02C17/163
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
134 words
Industrial milling apparatus for reducing the size of particles in liquid including a vessel (12), a rotor (14) in said vessel having a shaft (16) and a plurality of axially spaced rotor discs (18) mounted on the shaft, a quantity of grinding media (25) in the vessel (12) to be agitated by said rotor (14) as the liquid is pumped through the vessel, the improvement wherein: said rotor discs (18) each have a hub (28) attached to the shaft (16), a generally planar web (36) extending out from the hub having a plurality of enlarged ports (40) extending axially through the web for permitting the liquid and media to circulate in the vessel, and a rim (38) extending outwardly from the hub (28) having an axial thickness considerably greater than the web axial thickness.
Claim 2
Dependent Claim
134 words
Industrial milling apparatus for reducing the size of particles in liquid including a vessel (12), a rotor (14) in said vessel having a shaft (16) and a plurality of axially spaced rotor discs (18) mounted on the shaft, a quantity of grinding media (25) in the vessel (12) to be agitated by said rotor (14) as the liquid is pumped through the vessel, the improvement wherein: said rotor discs (18) each have a hub (28) attached to the shaft (16), a generally planar web (36) extending out from the hub having a plurality of enlarged ports (40) extending axially through the web for permitting the liquid and media to circulate in the vessel, and a rim (38) extending outwardly from the hub (28) having an axial thickness considerably greater than the web axial thickness.
Claim 3
Dependent Claim
20 words
The apparatus of Claim 1 wherein the rim (38) is more than twice the axial thickness of the web (36).
Claim 4
Dependent Claim
33 words
The apparatus of Claim 1 or 2 wherein the rim (38) includes a transition portion (38a) which tapers axially and radially outwardly from the web to a rim portion of greater axial thickness.
Claim 5
Dependent Claim
28 words
The apparatus of Claim 1 or 2 wherein the spacing between the rims (38) of adjacent discs (18) is approximately three times the axial thickness of the rims.
Claim 6
Dependent Claim
36 words
The apparatus of Claim 1 wherein the axial spacing of said discs (18) from one disc to the corresponding point of the adjacent disc is approximately four times the thickness of the rim of a disc.
Claim 7
Dependent Claim
20 words
The apparatus of Claim 1 or 2 wherein the diameter of a disc is about ten times the rim thickness.
Claim 8
Dependent Claim
23 words
The apparatus of Claim 1 or 2 wherein the radial thickness of the disc rim (38) is about equal to its axial thickness.
Claim 9
Dependent Claim
17 words
The apparatus of Claim 1 wherein the ports extend substantially from the hub (28) to the rim.
Claim 10
Dependent Claim
30 words
The apparatus of Claim 1 or 2 wherein"said hub (28) is made of metal while the web and rim are made of an abrasively tough plastic material, such as polyethylene.
Claim 11
Dependent Claim
24 words
The apparatus of Claim 9 wherein said web (36) and rim (38) are made of one piece and the web threads onto said hub.
Claim 12
Dependent Claim
31 words
The apparatus of Claim 9 wherein said hub (28) is axially thicker than the web (36) and the hub is secured to the shaft by means axially offset from the web.
Claim 13
Dependent Claim
21 words
The apparatus of Claim 1 wherein the ratio of a rim axial thickness to web thickness is about eight to three.
Claim 14
Dependent Claim
31 words
The apparatus of Claim 1 wherein the hub (28) is made of metal and the web and rim are made of a separate ceramic member which is mounted on the hub.
Claim 15
Dependent Claim
41 words
The apparatus of Claim 1 wherein, the radial dimension of the web (36) is about twice the radial dimension of the rim (38) and the axial thickness of the rim (38) is at least twice of that of the web (36).
Claim 16
Dependent Claim
28 words
The apparatus of Claim 1 wherein the outer diameter of the disc rim (38) portion is about twice that of the outer diameter of the hub portion (28).
Claim 17
Dependent Claim
55 words
In an industrial milling apparatus having a generally cylindrical vessel (12), grinding media (25) in the vessel, a rotor (14) rotatably mounted in the vessel (12) including a shaft (16) and a plurality of discs (18) axially spaced on the shaft for agitating the media (25) as a liquid/solid slurry is pumped through the vessel
Claim 18
Dependent Claim
55 words
In an industrial milling apparatus having a generally cylindrical vessel (12), grinding media (25) in the vessel, a rotor (14) rotatably mounted in the vessel (12) including a shaft (16) and a plurality of discs (18) axially spaced on the shaft for agitating the media (25) as a liquid/solid slurry is pumped through the vessel
Claim 19
Dependent Claim
108 words
(12), the improvement wherein: each of said rotor discs (18) has a hub (28) attached to the shaft (16), a web (36) attached to the hub having a plurality of large, axially extending ports (40) through which the slurry can flow, and a rim (38) formed integral with the web, and tapering axially from the web to an axial thickness considerably greater than that of the web so that the grinding media and product being propelled radially outwardly by a disc web is directed axially by the rim towards a similar flow from the adjacent disc to enhance thorough mixing and agitation of the media and the product.
Claim 20
Dependent Claim
108 words
(12), the improvement wherein: each of said rotor discs (18) has a hub (28) attached to the shaft (16), a web (36) attached to the hub having a plurality of large, axially extending ports (40) through which the slurry can flow, and a rim (38) formed integral with the web, and tapering axially from the web to an axial thickness considerably greater than that of the web so that the grinding media and product being propelled radially outwardly by a disc web is directed axially by the rim towards a similar flow from the adjacent disc to enhance thorough mixing and agitation of the media and the product.
Claim 21
Dependent Claim
31 words
The apparatus of Claim 16 wherein said hub (28) is made of metal while the web (36) and rim (38) are made of an abrasively tough plastic material, such as polypropylene.
Claim 22
Dependent Claim
22 words
The apparatus of Claim 16 wherein said hub (28) is made of metal while the web and rim are made of ceramic.
References Cited (Backward Citations)
No citation records indexed.
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