US3724146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibro-gyratory mills
Assignee: William Boulton Ltd
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Filing: 1971-01-04
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Granted: 1973-04-03
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Expires: 1991-01-04
Abstract
Abstract A vibro-gyratory grinding or finishing mill with an annular treatment chamber round which the charge of workpieces and media progresses under the influence of the vibratory movement, separation of workpieces and media being effected by exposing a normally covered screen to the charge, one component the charge falling through the screen and back into the chamber and the other component being retained by the screen and delivered to a discharge opening.
Inventors
- 👤 D Fahey
- 👤 R Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:12
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/06; B24B31/073
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
In a vibro-gyratory mill having a processing or treatment chamber which is of annular shape in plan and a vibratory mechanism serving to promote progression of a charge of workpieces and media around said chamber, the improvement comprising a separating chamber disposed beneath the floor of said chamber and including a separating screen and an outlet through which, after screening, separated workpieces can be discharged from the machine, means for returning the media to the treatment chamber, and deflector means selectively moveable between a discharge position in which the charge is directed into said separating chamber and a recirculation position in which the charge continues round the chamber.
Claim 2
Dependent Claim
108 words
In a vibro-gyratory mill having a processing or treatment chamber which is of annular shape in plan and a vibratory mechanism serving to promote progression of a charge of workpieces and media around said chamber, the improvement comprising a separating chamber disposed beneath the floor of said chamber and including a separating screen and an outlet through which, after screening, separated workpieces can be discharged from the machine, means for returning the media to the treatment chamber, and deflector means selectively moveable between a discharge position in which the charge is directed into said separating chamber and a recirculation position in which the charge continues round the chamber.
Claim 3
Dependent Claim
158 words
In a vibro-gyratory mill having a processing or treatment chamber which is of annular shape in plan and has an upward slope in the floor with a step connecting the upper and lower ends of the floor, and a vibratory mechanism serving to promote progression of a charge of workpieces and media around said chamber, the improvement comprising a separating chamber disposed beneath the upper end of said floor and including a separating screen and an outlet through which, after screening, separated workpieces can be discharged from the machine, means for returning the media to the lower end of the floor of said treatment chamber, and deflector means at the upper end of said floor selectively movable between a discharge position in which the charge is directed beneath the upper end of said floor into said separating chamber and a recirculation position in which the charge is directed back to the lower end of said floor for recirculation.
Claim 4
Dependent Claim
158 words
In a vibro-gyratory mill having a processing or treatment chamber which is of annular shape in plan and has an upward slope in the floor with a step connecting the upper and lower ends of the floor, and a vibratory mechanism serving to promote progression of a charge of workpieces and media around said chamber, the improvement comprising a separating chamber disposed beneath the upper end of said floor and including a separating screen and an outlet through which, after screening, separated workpieces can be discharged from the machine, means for returning the media to the lower end of the floor of said treatment chamber, and deflector means at the upper end of said floor selectively movable between a discharge position in which the charge is directed beneath the upper end of said floor into said separating chamber and a recirculation position in which the charge is directed back to the lower end of said floor for recirculation.
Claim 5
Dependent Claim
39 words
A vibro-gyratory mill according to claim 2 wherein said deflector means comprises a deflector plate pivotally movable about a horizontal axis extending transversely of said treatment chamber at a level below that of the upper end of said floor.
Claim 6
Dependent Claim
38 words
A vibro-gyratory mill according to claim 2 wherein said separating chamber includes an inclined screen sloping downwardly from said deflector means to said separating screen, said horizontal axis being located at the upper end of said inclined screen.
Claim 7
Dependent Claim
30 words
A vibro-gyratory mill according to claim 2 wherein said separating screen is disposed at a level below that of the lower end of said floor, the media discharged through the
Claim 8
Dependent Claim
31 words
A vibro-gyratory mill according to claim 2 wherein said treatment chamber is resiliently mounted and is vibrated by means of a motor secured to the treatment chamber and carrying eccentric weights.
Claim 9
Dependent Claim
18 words
A vibro-gyratory mill according to claim 2 wherein the floor of said treatment chamber is of arcuate cross-section.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |