US3574341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve closure for ladles and the like
Assignee: Didier Werke AG
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Filing: 1968-12-26
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Granted: 1971-04-13
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Expires: 1988-12-26
Abstract
Abstract In a valve closure assembly for controlling the discharge of molten material from the base of a container (e.g. the discharge of molten steel from a casting ladle) in which the flow takes place downwards through a valve seat controlled by an axiallymovable valve head, the valve head is supported on a movable support member which is disposed in a flow passage through a valve body and is supported from the latter by a plurality of circumferentially-spaced struts. The valve body is movable upwards, to open the valve, by raising the valve head through the mechanism of the support member and the downward flow from the valve seat is divided by the struts in the flow passage into a plurality of streams passing the support member.
Inventors
- 👤 Hans Reinhard Fehling
- 👤 Hans-Joachim Winkler
- 👤 Karl Modler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:51
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A valve closure assembly for controlling the discharge of molten metal from a container comprising a valve seat, an axially movable valve head made of refractory material having a generally concave upper surface so as to retain molten material therein, the valve head being axially movable toward and away from the valve seat to control the flow of molten material therethrough, an axially movable valve actuator disposed beneath the valve head, and means for imparting vertical motion to the valve actuator to control the flow of molten metal through the valve seat.
Claim 2
Dependent Claim
92 words
A valve closure assembly for controlling the discharge of molten metal from a container comprising a valve seat, an axially movable valve head made of refractory material having a generally concave upper surface so as to retain molten material therein, the valve head being axially movable toward and away from the valve seat to control the flow of molten material therethrough, an axially movable valve actuator disposed beneath the valve head, and means for imparting vertical motion to the valve actuator to control the flow of molten metal through the valve seat.
Claim 3
Dependent Claim
41 words
A valve closure assembly according to claim 1 in which the valve actuator supports the valve head by surface engagement therewith and is removable from the valve head by downward motion following engagement of the valve head with the valve seat.
Claim 4
Dependent Claim
53 words
A valve closure assembly according to claim 1 including support means for the valve head comprising at least one support member traversing the path of flow of molten metal through the valve assembly, whereby the flow of metal is divided into a plurality of streams which are reunited after passing the support member.
Claim 5
Dependent Claim
84 words
A valve closure assembly for controlling the discharge of molten metal from a container comprising a valve seat, an axially movable valve head made of refractory material and having a metal core, the valve head being axially movable toward and away from the valve seat to control the flow of molten material therethrough, an axially movable valve actuator disposed beneath the valve head, and means for imparting vertical motion to the valve actuator to control the flow of molten metal through the valve seat.
Claim 6
Dependent Claim
84 words
A valve closure assembly for controlling the discharge of molten metal from a container comprising a valve seat, an axially movable valve head made of refractory material and having a metal core, the valve head being axially movable toward and away from the valve seat to control the flow of molten material therethrough, an axially movable valve actuator disposed beneath the valve head, and means for imparting vertical motion to the valve actuator to control the flow of molten metal through the valve seat.
Claim 7
Dependent Claim
40 words
A valve closure assembly according to claim 4 in which the valve actuator supports the valve head by surface engagement therewith and is removable from the valve head by downward motion following engagement of valve head with the valve seat.
Claim 8
Dependent Claim
53 words
A valve closure assembly according to claim 4 including support means for the valve head comprising at least one support member traversing the path of flow of molten metal through the valve assembly, whereby the flow of metal is divided into a plurality of streams which are reunited after passing the support member.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |