US4504017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for comminuting materials to extremely fine size using a circulating stream jet mill and a discrete but interconnected and interdependent rotating anvil-jet impact mill
Assignee: NORANDY Inc
•
Filing: 1983-06-08
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Granted: 1985-03-12
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Expires: 2003-06-08
Abstract
Abstract Apparatus for comminuting materials to extremely fine size includes a circulating stream jet mill and a discrete but functionally interconnected and interdependent rotating anvil-jet impact mill. New material is injected into the impact mill against a rotor, and the partly comminuted material is transferred to the jet mill with vortex feed into the jet mill. Uncomminuted material in the jet mill is reinjected into the impact mill. The two mills transfer the material back and forth until the particles are comminuted, classified, and removed from the jet mill. The anvil-jet mill is provided with stationary anvils and support for turning the rotor at increased velocity.
Inventors
- 👤 Norwood H. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:02
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/06
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
259 words
Comminuting apparatus comprising: (a) a discrete re-entrant circulating stream jet mill; (b) a discrete rotating anvil-jet impact mill; (c) said circulating stream jet mill and said rotating anvil-jet impact mill being functionally interconnected to comminute material to extremely fine sizes; (d) said re-entrant circulating stream jet mill comprising a vortex chamber including an annular peripheral wall and opposed lateral walls, an axial outlet, and a vortex feed chamber closed at one end and opening at the other end into one of said lateral walls through an annular opening adjacent the jet tangent circle; (e) said rotating anvil-jet impact mill comprising an impact chamber including an annular peripheral wall and opposed lateral walls, shaft means extending into said impact chamber and supporting a rotor thereon, said rotor including a plurality of anvils; (f) raw material feed means for introducing uncomminuted material into said rotating anvil-jet impact mill; (g) conduit means connecting an opening in the peripheral wall of said rotating anvil-jet impact mill to said vortex feed chamber, said conduit being connected to said impact mill so that material flows therefrom to said vortex feed chamber; (h) fluid jet means for reinjecting fluid and material into said impact mill against and in a direction opposite to the direction of rotation of said rotor; (i) second conduit means for connecting an opening in the peripheral wall of said circulating stream jet mill to said fluid jet reinjection means whereby partly ground material flows from the circulating stream jet mill to said reinjection means and is thereby injected into said impact mill.
Claim 2
Dependent Claim
259 words
Comminuting apparatus comprising: (a) a discrete re-entrant circulating stream jet mill; (b) a discrete rotating anvil-jet impact mill; (c) said circulating stream jet mill and said rotating anvil-jet impact mill being functionally interconnected to comminute material to extremely fine sizes; (d) said re-entrant circulating stream jet mill comprising a vortex chamber including an annular peripheral wall and opposed lateral walls, an axial outlet, and a vortex feed chamber closed at one end and opening at the other end into one of said lateral walls through an annular opening adjacent the jet tangent circle; (e) said rotating anvil-jet impact mill comprising an impact chamber including an annular peripheral wall and opposed lateral walls, shaft means extending into said impact chamber and supporting a rotor thereon, said rotor including a plurality of anvils; (f) raw material feed means for introducing uncomminuted material into said rotating anvil-jet impact mill; (g) conduit means connecting an opening in the peripheral wall of said rotating anvil-jet impact mill to said vortex feed chamber, said conduit being connected to said impact mill so that material flows therefrom to said vortex feed chamber; (h) fluid jet means for reinjecting fluid and material into said impact mill against and in a direction opposite to the direction of rotation of said rotor; (i) second conduit means for connecting an opening in the peripheral wall of said circulating stream jet mill to said fluid jet reinjection means whereby partly ground material flows from the circulating stream jet mill to said reinjection means and is thereby injected into said impact mill.
Claim 3
Dependent Claim
42 words
Apparatus in accordance with claim 1 wherein said vortex feed means in partly closed by a disc at the end which opens into said comminuting and classifying chamber, said disc defining the annular opening through which material is fed into said chamber.
Claim 4
Dependent Claim
24 words
Apparatus in accordance with claim 1 wherein said jet reinjection means is positioned to direct said material against the rotating anvils on said rotor.
Claim 5
Dependent Claim
23 words
Apparatus in accordance with claim 1 wherein said jet reinjection means is positioned to direct said material against the surface of said rotor.
Claim 6
Dependent Claim
16 words
Apparatus in accordance with claim 1 wherein said anvils are on the periphery of said rotor.
Claim 7
Dependent Claim
20 words
Apparatus in accordance with claim 1 wherein said anvils are on the surface of said rotor adjacent the periphery thereof.
Claim 8
Dependent Claim
21 words
Apparatus in accordance with claim 1 wherein said anvils are on the periphery and on the adjacent surface of said rotors.
Claim 9
Dependent Claim
28 words
Apparatus in accordance with claim 1 wherein said lateral walls diverge from each other with the greatest distance of divergence being spaced radially inward from the peripheral wall.
Claim 10
Dependent Claim
228 words
Comminuting apparatus comprising: (a) a discrete re-entrant circulating stream jet mill; (b) a discrete rotating anvil-jet impact mill; (c) said circulating stream jet mill and said rotating anvil-jet impact mill being functionally interconnected to comminute material to extremely fine sizes; (d) said re-entrant circulating stream jet mill comprising a vortex chamber including an annular peripheral wall and opposed lateral walls, an axial outlet, and a vortex feed chamber at the axis of said mill opening into one of said lateral walls through an annular opening; (e) said rotating anvil-jet impact mill comprising an impact chamber including an annular peripheral wall and opposed lateral walls, shaft means extending into said impact chamber and supporting a rotor thereon; (f) raw material feed means for introducing uncomminuted material into said comminuting apparatus; (g) conduit means connecting said rotating anvil-jet impact mill to said vortex feed chamber, said conduit being connected to said impact mill so that material flows therefrom to said vortex feed chamber; (h) fluid jet means for reinjecting fluid and material into said impact mill against and in a direction opposite to the direction of rotation of said rotor; (i) second conduit means for connecting said circulating stream jet mill to said fluid jet reinjection means whereby partly ground material flows from the circulating stream jet mill to said reinjection means and is thereby injected into said impact mill.
Claim 11
Dependent Claim
228 words
Comminuting apparatus comprising: (a) a discrete re-entrant circulating stream jet mill; (b) a discrete rotating anvil-jet impact mill; (c) said circulating stream jet mill and said rotating anvil-jet impact mill being functionally interconnected to comminute material to extremely fine sizes; (d) said re-entrant circulating stream jet mill comprising a vortex chamber including an annular peripheral wall and opposed lateral walls, an axial outlet, and a vortex feed chamber at the axis of said mill opening into one of said lateral walls through an annular opening; (e) said rotating anvil-jet impact mill comprising an impact chamber including an annular peripheral wall and opposed lateral walls, shaft means extending into said impact chamber and supporting a rotor thereon; (f) raw material feed means for introducing uncomminuted material into said comminuting apparatus; (g) conduit means connecting said rotating anvil-jet impact mill to said vortex feed chamber, said conduit being connected to said impact mill so that material flows therefrom to said vortex feed chamber; (h) fluid jet means for reinjecting fluid and material into said impact mill against and in a direction opposite to the direction of rotation of said rotor; (i) second conduit means for connecting said circulating stream jet mill to said fluid jet reinjection means whereby partly ground material flows from the circulating stream jet mill to said reinjection means and is thereby injected into said impact mill.
Claim 12
Dependent Claim
35 words
Apparatus in accordance with claim 9 wherein said rotor comprises two conical discs joined at their apexes, and said jet reinjection means is positioned to direct material into the channel defined by said two discs.
Claim 13
Dependent Claim
31 words
Apparatus in accordance with claim 10 wherein a plurality of regularly spaced fan blades are mounted on said rotor at a position spaced radially inward from the periphery of said rotor.
Claim 14
Dependent Claim
70 words
Comminuting apparatus in accordance with claims 1 or 9 wherein said shaft means extends through said impact chamber, is supported on opposite sides of said impact chamber by rotary bearing means, and each of said bearing means includes conduit means for conducting gaseous fluid into said impact chamber where said shaft enters said chamber, whereby material in said chamber is prevented from flowing along said shaft into the bearing means.
Claim 15
Dependent Claim
14 words
Apparatus in accordance with claim 9 wherein said rotor includes a plurality of anvils.
Claim 16
Dependent Claim
22 words
Apparatus in accordance with claim 13 wherein said anvils are on the periphery and on the adjacent side surface of said rotors.
Claim 17
Dependent Claim
25 words
Comminuting apparatus in accordance with claim 13 wherein stationary anvils are positioned on the interior of the annular peripheral wall of said anvil-jet impact mill.
Claim 18
Dependent Claim
16 words
Apparatus in accordance with claim 9 wherein said anvils are on the periphery of said rotor.
Claim 19
Dependent Claim
23 words
Apparatus in accordance with claim 9 wherein said anvils are on a side surface of said rotor adjacent to periphery of the rotor.
Claim 20
Dependent Claim
43 words
Comminuting apparatus in accordance with claim 9 wherein said vortex feed means is partly closed by a disc at the end which opens into said comminuting and classifying chamber, said disc defining the annular opening through which material is fed into said chamber.
Claim 21
Dependent Claim
25 words
Apparatus in accordance with claim 18 wherein said annular opening is positioned adjacent to the stream jet tangent circle of said circulating stream jet mill.
Claim 22
Dependent Claim
217 words
Comminuting apparatus comprising: (a) a discrete re-entrant circulating stream jet mill; (b) a discrete rotating anvil-jet impact mill; (c) said circulating stream jet mill and said rotating anvil-jet impact mill being functionally interconnected to comminute material to extremely fine sizes; (d) said re-entrant circulating stream jet mill comprising a vortex chamber including an annular peripheral wall and opposed lateral walls, an axial outlet, and feed means opening into the said chamber at the axis thereof; (e) said rotating anvil-jet impact mill comprising an impact chamber including an annular peripheral wall and opposed lateral walls, shaft means extending into said impact chamber and rotatably supporting anvil means thereon; (f) raw feed materials for introducing uncomminuted material into said comminuting apparatus; (g) conduit means connecting said rotating anvil-jet impact mill to said feed means for said circulating stream jet mill for transferring material from said impact mill to said re-entrant circulating stream jet mill; (h) fluid jet means for reinjecting fluid and material into said impact mill against and in a direction opposite to the direction of rotation of said rotor; (i) second conduit means for connecting said circulating stream jet mill to said fluid jet reinjection means for transferring partly ground material from said circulating stream jet mill to said reinjection means for injection into said impact mill.
Claim 23
Dependent Claim
217 words
Comminuting apparatus comprising: (a) a discrete re-entrant circulating stream jet mill; (b) a discrete rotating anvil-jet impact mill; (c) said circulating stream jet mill and said rotating anvil-jet impact mill being functionally interconnected to comminute material to extremely fine sizes; (d) said re-entrant circulating stream jet mill comprising a vortex chamber including an annular peripheral wall and opposed lateral walls, an axial outlet, and feed means opening into the said chamber at the axis thereof; (e) said rotating anvil-jet impact mill comprising an impact chamber including an annular peripheral wall and opposed lateral walls, shaft means extending into said impact chamber and rotatably supporting anvil means thereon; (f) raw feed materials for introducing uncomminuted material into said comminuting apparatus; (g) conduit means connecting said rotating anvil-jet impact mill to said feed means for said circulating stream jet mill for transferring material from said impact mill to said re-entrant circulating stream jet mill; (h) fluid jet means for reinjecting fluid and material into said impact mill against and in a direction opposite to the direction of rotation of said rotor; (i) second conduit means for connecting said circulating stream jet mill to said fluid jet reinjection means for transferring partly ground material from said circulating stream jet mill to said reinjection means for injection into said impact mill.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |