US3618864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of comminuting particulate matter
Assignee: Vickers Ltd
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Filing: 1969-04-01
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Granted: 1971-11-09
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Expires: 1989-04-01
Abstract
Abstract A method of comminuting particulate material in a mill having loosely mounted roller crushing masses that orbit inside a cylindrical chamber, the material being crushed between the masses and the chamber wall. The material is forced into one end of the chamber suspended in a carrier fluid, such as gas, liquid or a foamed substance, which is directed in a helical path along the chamber wall. The material in the carrier fluid is crushed progressively into smaller particles as it progresses through the chamber.
Inventors
- 👤 Laszlo Lazarus Szego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:38
CPC Classifications
B; B02; B02C; B02C15/00; B02C15/08; B02C2015/002
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
A method as claimed in claim 1, wherein the disclike roller crushing masses are so stacked that their crushing surfaces are spaced apart in the axial direction of the chamber, positively driving the roller crushing masses to follow orbital paths around the wall of said chamber, whereby the disclike crushing masses roll freely and substantially without sliding along individual tracks while being rotated about their own centers solely by frictional torque due to contact with a layer of particulate material intervening between the wall of the crushing chamber and the disclike roller crushing masses.
Claim 2
Dependent Claim
15 words
A method as claimed in claim 1, wherein the stream of carrier fluid is air.
Claim 3
Dependent Claim
16 words
A method as claimed in claim 2, wherein the stream of carrier fluid is a gas.
Claim 4
Dependent Claim
18 words
A method as claimed in claim 1, wherein the stream of carrier fluid is a mixture of gases.
Claim 5
Dependent Claim
16 words
A method as claimed in claim 1, wherein the stream of carrier fluid is a liquid.
Claim 6
Dependent Claim
18 words
A method as claimed in claim 1, wherein the stream of carrier fluid is a mixture of liquids.
Claim 7
Dependent Claim
22 words
A method as claimed in claim 1, wherein the stream of carrier fluid is a foam of air dispersed in a liquid.
Claim 8
Dependent Claim
24 words
A method as claimed in claim 2, wherein the stream of carrier fluid is a foam of air dispersed in a mixture of liquids.
Claim 9
Dependent Claim
23 words
A method as claimed in claim 1, wherein the stream of carrier fluid is a foam of gas bubbles dispersed in a liquid.
Claim 10
Dependent Claim
25 words
A method as claimed in claim 1, wherein the stream of carrier fluid is a foam of gas bubbles dispersed in a mixture of liquids.
Claim 11
Dependent Claim
30 words
A method as claimed in claim 1, the step of using roller crushing masses comprising stacks of separate discs whose peripheral edges are provided with grooves or recesses at intervals.
Claim 12
Dependent Claim
125 words
A method as claimed in claim 1, the step of employing roller crushing masses comprising roller masses of polyhedral form having a circumferential crushing surface made up of a series of convex part-spherical arcuate crushing faces all of equal radius of curvature greater than the mean curvature of the roller crushing mass itself, in combination with an associated crushing chamber having a cooperating internal surface made up of a series of identical concave part-cylindrical arcuate sections whose circumferential widths are equal to those of the convex crushing faces of the roller crushing masses and whose radius of curvature is greater than the mean internal radius of the associated crushing chamber and greater than the radius of curvature of the convex faces of the roller masses.
Claim 13
Dependent Claim
125 words
A method as claimed in claim 2, the step of using roller crushing masses comprising roller mAsses of polyhedral form having a circumferential crushing surface made up of a series of convex part-cylindrical arcuate crushing faces all of equal radius of curvature greater than the mean curvature of the roller crushing mass itself, in combination with an associated crushing chamber having a cooperating internal surface made up of a series of identical concave part-cylindrical arcuate sections whose circumferential widths are equal to those of the convex crushing faces of the roller crushing masses and whose radius of curvature is greater than the mean internal radius of the associated crushing chamber and greater than the radius of curvature of the convex faces of the roller masses.
Claim 14
Dependent Claim
24 words
A method as claimed in claim 1, the step of using roller crushing masses comprising stacks of coaxial discs whose axial thicknesses are alike.
Claim 15
Dependent Claim
23 words
A method as claimed in claim 1, wherein the roller crushing masses employed comprise stacks of polyhedral forms whose axial thicknesses are alike.
Claim 16
Dependent Claim
32 words
A method as claimed in claim 2, wherein the roller crushing masses employed comprise stacks of coaxial discs whose axial thicknesses vary progressively from one end to the other of the stacks.
Claim 17
Dependent Claim
33 words
A method as claimed in claim 1, the step of using roller crushing masses comprising stacks of polyhedral forms whose axial thicknesses vary progressively from one end to the other of the stacks.
Claim 18
Dependent Claim
118 words
A method as claimed in claim 1, the steps of using disclike roller crushing masses freely floating in relatively rotating crushing chambers, positively gyrating said chambers in an orbital path around a central axis of the mill and simultaneously rotating said chambers about their own axes of symmetry, thereby freely rolling the disclike crushing masses, stacked so that their crushing surfaces are spaced apart in the axial direction of the associated chamber, substantially without sliding along individual tracks while being rotated about their own axes of symmetry solely by frictional torque due to contact with a layer of particulate matter intervening between the walls of the relatively rotating and gyrating crushing chambers and the disclike roller crushing masses.
Claim 19
Dependent Claim
117 words
A method as claimed in claim 19, the step of using roller crushing masses comprising roller masses of polyhedral form having a circumferential crushing surface made up of a series of convex part-spherical arcuate crushing faces all of equal radius of curvature greater than the mean curvature of the roller crushing chamber having a cooperating internal surface made up of a series of identical concave part-cylindrical arcuate sections whose circumferential widths are equal to those of the convex crushing faces of the roller crushing masses and whose radius of curvature is greater than the mean internal radius of the associated crushing chamber and greater than the radius of curvature of the convex faces of the roller masses.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |