US3561678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge for spraying liquid material to be prilled
Assignee: Norsk Hydro Elektrisk Kvaelstof AS
•
Filing: 1968-10-14
•
Granted: 1971-02-09
•
Expires: 1988-10-14
Abstract
Abstract Centrifuge for use in spraying liquid material intended to be converted into so-called prills. The centrifuge comprises a centrifuge container having a perforated wall, a displacement body arranged in said container and means for rotating the container. Liquid material to be sprayed is supplied through a pipe, either to the annular space between the displacement body and the perforated wall of the centrifuge container, or to the inner space of a hollow displacement body having orifices through which the liquid material can flow out in the space between the body and the perforated wall of the centrifuge container. The displacement body may be mounted axially moveable and/or rotatable independently of the centrifuge container.
Inventors
- 👤 Isak Andreas Friestad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:50
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/02; Y; Y02; Y02P; Y02P60/00; Y02P60/20; Y02P60/21
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
32 words
A centrifuge as claimed in claim 1, wherein the distance between the perforated wall of the centrifuge container and the said surface of the displacement body is not more than 20 mm.
Claim 2
Dependent Claim
95 words
A centrifuge suitable for spraying liquid material, which may have dispersed solid particles therein so as to form droplets comprising a perforated container through which in operation the material is sprayed, a displacement body in said container, the surface of said body facing the perforated wall of said container having substantially the same rotational shape as the said wall and being substantially concentric therewith, means for rotating the centrifuge container and a supply pipe for liquid material to be sprayed, said pipe communicating with the annular space between the centrifuge wall and the displacement body.
Claim 3
Dependent Claim
118 words
A centrifuge suitable for spraying liquid material so as to form droplets, comprising a perforated container through which in operation the material is sprayed, a hollow displacement body in said container, the surface of said body facing the perforated wall of the centrifuge container having substantially the same rotational shape as said wall and being concentric therewith, the wall of the hollow displacement body being provided with orifices through which liquid material can flow from the inner space of the displacement body into the annular space between the said body and the perforated wall of the centrifuge container, means for supplying liquid material to the inner space of the displacement body, and means for rotating the centrifuge container.
Claim 4
Dependent Claim
77 words
A centrifuge suitable for spraying liquid material so as to form droplets, comprising a vertically mounted, rotatable shaft, means for rotating the shaft, a centrifuge container rigidly mounted on said shaft, said container having a perforated wall having an increasing cross section from the lower end upwardly, a displacement body in said container, the surface of said body having substantially the same rotational shape as the perforated wall of the centrifuge container, and being substantially concentric therewith.
Claim 5
Dependent Claim
43 words
A centrifuge as claimed in claim 5 comprising a second vertically mounted, rotatable shaft on which the displacement body is rigidly mounted, and means for rotating said second shaft independently of the rotation of the shaft on which the centrifuge container is mounted.
Claim 6
Dependent Claim
22 words
Centrifuge as claimed in claim 1 wherein the distance between the displacement body and the centrifuge wall is from 2- 10 mm.
Claim 7
Dependent Claim
22 words
Centrifuge as claimed in claim 4 wherein the distance between the displacement body and the centrifuge wall is from 2- 10 mm.
References Cited (Backward Citations)
US2779473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |