US3856269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing apparatus
Assignee: Imperial Chemical Industries Ltd
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Filing: 1972-10-24
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Granted: 1974-12-24
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Expires: 1992-10-24
Abstract
Abstract Apparatus for mixing liquids and particulate solids wherein a continuous vortex of liquid is formed in a funnel and particulate solids are dropped along the axis of the funnel and deflected radially outward into the vortex. The deflection is accomplished by a corona discharge electrode. The invention is particularly applicable to the manufacture of high potash prilled NPK fertilizers.
Inventors
- 👤 B Fothergill
- 👤 H Earle
- 👤 W Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:31
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/10; B01F33/00; B01F33/05; C; C05; C05G; C05G5/00; C05G5/10; C05G5/12; B01F23/00; B01F23/50; B01F23/56
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
An apparatus for mixing together liquids and particulate solids, comprising a funnel shaped base having a substantially vertical axis, fluid injection means for introducing a stream of liquid tangentially into the mixer to establish a continuous vortex in at least the lower part of the funnel shaped base, solid inlet means for introducing a stream of solid particles into the mixer, and substantially down the axis thereof, deflection means comprising a corona discharge electrode located substantially at the axis of the funnel, below the level of the solid inlet means and adapted to deflect the solid particles substantially radially outward into the vortex, when the apparatus is in use, to form a mixture of the solid with the liquid, and an outlet for the mixture at the base of the funnel.
Claim 2
Independent Claim
131 words
An apparatus for mixing together liquids and particulate solids, comprising a funnel shaped base having a substantially vertical axis, fluid injection means for introducing a stream of liquid tangentially into the mixer to establish a continuous vortex in at least the lower part of the funnel shaped base, solid inlet means for introducing a stream of solid particles into the mixer, and substantially down the axis thereof, deflection means comprising a corona discharge electrode located substantially at the axis of the funnel, below the level of the solid inlet means and adapted to deflect the solid particles substantially radially outward into the vortex, when the apparatus is in use, to form a mixture of the solid with the liquid, and an outlet for the mixture at the base of the funnel.
Claim 3
Dependent Claim
22 words
An apparatus according to claim 1 wherein the deflection means is located no higher than the level of the fluid injection means.
Claim 4
Dependent Claim
17 words
An apparatus according to claim 2 wherein the fluid injection means comprises at least two tangential inlets.
Claim 5
Dependent Claim
26 words
An apparatus according to claim 3 wherein the total cross sectional area of the inlets is less than half the cross sectional area of the outlet.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 1 wherein the height of the deflection means is adjustable.
Claim 7
Dependent Claim
26 words
An apparatus according to claim 1 which additionally comprises a skirt located above and substantially co-axially around the deflection means to protect the latter from splashes.
Claim 8
Dependent Claim
50 words
An apparatus according to claim 1 wherein the deflection means comprises a substantially linear conductor lying substantially in the axis of the mixer and insulated therefrom a grounded skirt substantially co-axially surrounding at least part of the conductor and means for charging the conductor sufficiently to establish a corona discharge.
Claim 9
Dependent Claim
41 words
An apparatus according to claim 7 wherein said deflection means includes a conical deflector located above the corona discharge electrode and below the solids inlet, to form the falling solidS into a circular curtain around the electrode and within the skirt.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |