Patent US3944924A successfully refreshed from Google Patents.
US3834629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for shaping a stream of melt flowing from a tapping hole
Assignee: Stora Enso Oyj
•
Filing: 1972-08-18
•
Granted: 1974-09-10
•
Expires: 1992-08-18
Abstract
Abstract A falling stream of a liquid tends to obtain a circular cross sectional shape, owing to the surface tension of the liquid. In the manufacture of metal powder by atomizing a falling stream of molten metal it is desired, however, that the stream shall have a flattened cross sectional shape. It has been found useful to make the molten metal flow through an orifice having a rectangular cross sectional area, and to make the molten metal follow the short sides of the orifice for a longer distance than it follows the long sides of the orifice.
Inventors
- 👤 P Hellman
- 👤 J Sondell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:51
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; B22D; B22D41/00; B22D41/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A nozzle stone for a casting ladle or a casting box, having a substantially rectangular outlet opening of a pair of long and short edges for a molten stream of metal spread in a plane extending in the longitudinal direction of the rectangular outlet, said rectangular opening defined by, inwardly from the opening, projecting walls of the rectangular outlet, and walls arranged in pairs opposite each other, said walls forming a pair of short sided walls and a pair of long sided walls, said long sided walls defining narrow edges of said rectangle and wherein a projecting boss at each of the short edges of the rectangular outlet opening protrude outside the outer edges of the long walls whereby the bosses provide an extension of the narrower edges of the rectangular opening.
Claim 2
Dependent Claim
132 words
A nozzle stone for a casting ladle or a casting box, having a substantially rectangular outlet opening of a pair of long and short edges for a molten stream of metal spread in a plane extending in the longitudinal direction of the rectangular outlet, said rectangular opening defined by, inwardly from the opening, projecting walls of the rectangular outlet, and walls arranged in pairs opposite each other, said walls forming a pair of short sided walls and a pair of long sided walls, said long sided walls defining narrow edges of said rectangle and wherein a projecting boss at each of the short edges of the rectangular outlet opening protrude outside the outer edges of the long walls whereby the bosses provide an extension of the narrower edges of the rectangular opening.
Claim 3
Dependent Claim
23 words
The nozzle stone according to claim 1 and wherein the long sided walls of the rectangular opening diverge outwardly at the rectangular opening.
Claim 4
Dependent Claim
17 words
The nozzle stone according to claim 1 and wherein the bosses are convexly round towards each other.
Claim 5
Dependent Claim
26 words
The nozzle stone according to claim 1 and wherein the bosses are convexly round towards each other and their faces divergent in respect to each other.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |