US3581948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding gate of a casting ladle for pouring liquid metals
Assignee: Interstop AG
•
Filing: 1969-08-11
•
Granted: 1971-06-01
•
Expires: 1989-08-11
Abstract
Abstract A sliding gate for a casting ladle provided with a bottom lip, for pouring liquid metals, particularly steel, composed of a fireproof plate provided with an aperture to be firmly set under the bottom of the ladle by means of a metal frame piece, and a further refractory shutter plate provided with an outlet, set on a metal sliding piece which slides on the first plate and is slidably set in the rigid frame piece. A sliding shutter is provided with an installation which will allow the prevention and/or the elimination of the solidification of the melt in the discharge canal of the casting ladle, particularly in the aperture of the firmly set plate of the sliding shutter.
Inventors
- 👤 Pol Detalle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:26
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
Sliding gate for a casting ladle or similar container, provided with a bottom lip, for pouring liquid metals, particularly steel, comprising a rigid metal frame piece 8 under the bottom of the ladle; a fireproof plate 9 provided with an aperture firmly set in said frame piece; a sliding piece 11 under said fireproof plate, slidably set in said frame piece and having a pair of spaced apertures; a refractory shutter plate 13 having an outlet 12 cooperating with one of said apertures of the sliding piece, and being supportEd on said sliding piece 11, said shutter plate 13 having adjacent said outlet 12 at least one boring 16 cooperating with the other of said apertures of said sliding piece and having shutter means 17 under said aperture 10 of said fireproof plate whereby a gas supply line may discharge onto the lower end of said boring.
Claim 2
Dependent Claim
147 words
Sliding gate for a casting ladle or similar container, provided with a bottom lip, for pouring liquid metals, particularly steel, comprising a rigid metal frame piece 8 under the bottom of the ladle; a fireproof plate 9 provided with an aperture firmly set in said frame piece; a sliding piece 11 under said fireproof plate, slidably set in said frame piece and having a pair of spaced apertures; a refractory shutter plate 13 having an outlet 12 cooperating with one of said apertures of the sliding piece, and being supportEd on said sliding piece 11, said shutter plate 13 having adjacent said outlet 12 at least one boring 16 cooperating with the other of said apertures of said sliding piece and having shutter means 17 under said aperture 10 of said fireproof plate whereby a gas supply line may discharge onto the lower end of said boring.
Claim 3
Dependent Claim
20 words
Sliding gate according to claim 1 wherein said shutter means is a gas permeable plug set into said boring 16.
Claim 4
Dependent Claim
20 words
Sliding gate according to claim 2 wherein said plug is a stone made of a gas permeable and refractory material.
Claim 5
Dependent Claim
17 words
Sliding gate according to claim 2 wherein said boring 16 and said plug taper off upwards conically.
Claim 6
Dependent Claim
29 words
Sliding gate according to claim 1 wherein at least the upper end of said boring 16 has a smaller cross section than said aperture 10 of said fireproof plate.
Claim 7
Dependent Claim
26 words
Sliding gate according to claim 2 wherein the operative cross section of said plug is smaller on its upper end than that of said aperture 10.
Claim 8
Dependent Claim
24 words
Sliding gate according to claim 2 wherein said plug is made of a gas permeable material which does not react with the liquid metal.
Claim 9
Dependent Claim
39 words
Sliding gate according to claim 1 wherein a plurality of borings are provided which when said shutter means is closed cover part of said aperture 10 of said fireproof plate and are connected with a common gas supply line.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |